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mkvtoolnix: updated to 88.0

Version 88.0 "All I Know" 2024-10-19

New features and enhancements

* mkvmerge, MKVToolNix GUI's chapter editor: added support for reading
  chapters from PotPlayer bookmark files.

Bug fixes

* configure: fixed setting `HAVE_QTDBUS` properly if the QtDbus module is
  found.
* mkvmerge: MP4 reader: mkvmerge will no longer warn when multiple identical
  FourCCs are present within the same track headers.
* mkvmerge man page: removed the wrong statement that an attachment's MIME
  type must be set before use of the `--attach-file` & `--attach-file-once`
  options. If not given, mkvmerge auto-detects the MIME type.

mkvtoolnix: updated to 87.0

Version 87.0 "Black as the Sky" 2024-09-07

New features and enhancements

* mkvmerge: chapters: added support for specifying MPLS files with
 `--chapters`, too, not just as regular source files. The documentation
 stated this was possible already, but that wasn't actually the
 case.
* MKVToolNix GUI: multiplexer: added a progress dialog that is shown during
 file identification.
* MKVToolNix GUI: jobs: the status bar now differentiates between numbers of
 warnings/errors that occurred in the current session and those that occurred
 before the current session.

Bug fixes

* mkvmerge: AAC parser: LOAS/LATM streams: if the first `AudioSpecificConfig`
 element is not found within the first LOAS/LATM frame, `mkvmerge` will no
 longer discard the frames before it but defer parsing them until after it
 has found the `AudioSpecificConfig` element.
* MKVToolNix GUI: job queue: fixed the GUI crashing when re-ordering the jobs
 in the job queue. This regression was introduced while fixing 3720.

Build system changes

* The bundled `fmt` library was updated to v10.2.1.

mkvtoolnix: updated to 86.0

ersion 86.0 "Winter" 2024-07-13

New features and enhancements

* mkvmerge: Matroska reader: track statistics tags are included in the JSON
  identification output just like other tags had already been included: as
  part of the track properties, prefixed with `tag_`.
* mkvmerge: MPEG TS reader: mkvmerge will now detect teletext subtitle tracks
  even if they're not listed in the PMT as long as it can find teletext pages
  flagged as subtitles in the header within the probed ranged of the
  file.
* MKVToolNix GUI: multiplexer: the default mode for escaping the arguments in
  the "Show command line" dialog can now be set in the preferences.
* MKVToolNix GUI: multiplexer: the "Show command line" dialog now includes the
  command lines for all currently open multiplex settings, switchable with a
  combo box.
* MKVToolNix GUI: multiplexer: some users add the option
  `--regenerate-track-uids` to the "additional options", even though
  `--regenerate-track-uids` is a file-specific option, and you can only use
  global options in the "additional options". However, the GUI currently
  doesn't have an option for specifying additional file-specific options. The
  GUI now detects the use of this option in the "additional options" & adds it
  for each of the source files instead.
* MKVToolNix GUI: multiplexer: the option `--regenerate-track-uids` has been
  added to the "additional command line options" dialog.
* translations: added a Norwegian Bokmål translation of the man pages by Roger
  Knutsen (see `AUTHORS`).

Bug fixes

* mkvmerge: when using timestamp files for subtitle tracks, mkvmerge will no
  longer set a default duration for the track.
* mkvmerge: when using timestamp files for subtitle tracks, mkvmerge will no
  longer queue frames longer than necessary, which resulted in the frames
  sometimes being written much later than they should have been according to
  their timestamps.
* mkvmerge: when using timestamp files for subtitle tracks, mkvmerge will now
  write the packets' duration properly.
* MKVToolNix GUI: job queue: the shortcut from the "Job queue" menu are now
  enabled correctly whenever the number of jobs in the queue changes (e.g. by
  adding new jobs).

mkvtoolnix: updated to 85.0

Version 85.0 "Shame For You" 2024-06-02

Bug fixes

* fixed compilation of `src/common/sorting.h` with certain compilers due to
  the deprecation & removal of `std::result_of<>` in C++20.
* fixed compilation with the `gtest` library when `gtest` requires additional
  libraries by querying `pkg-config` for the correct flags & libraries to
  build with.
* MKVToolNix GUI: multiplexer: restored the keyboard shortcut for switching to
  the "Attachments" tab (Alt+C for the English interface).
* MKVToolNix GUI: multiplexer: fixed several cases when the keyboard shortcuts
  for copying the first source file's name/the destination file's name to the
  title (Ctrl+F & Ctrl+D) and the one for copying the title to the destination
  file name (Ctrl+T) were not enabled.

mkvtoolnix: updated to 84.0

Version 84.0 "Sleeper" 2024-04-28

New features and enhancements

* mkvmerge: added a new file-specific option `--regenerate-track-uids`. When
  used for Matroska files, `mkvmerge` will generate new random track UIDs
  instead of keeping existing track UIDs. This is done automatically when a
  Matroska file was created by MakeMKV.
* mkvmerge: MP4 reader: added support for FLAC in MP4.
* MKVToolNix GUI: multiplexer: the "Attachments" tab's title will now include
  the total number of attachments (both from source files & to newly
  attach).
* translations: added a Norwegian Bokmål translation of the programs by Roger
  Knutsen (see `AUTHORS`).

Bug fixes

* configure: when called with `--disable-gui` the build system still ran the
  check for the GUI libraries & failed if they weren't found. This check is
  now skipped when the option is given.
* mkvmerge: several color-related track header properties were parsed into &
  stored as a wrong integer type internally. This could result in wrong values
  being copied when very large values were present in source files, or in
  error messages when very large values were used as command-line parameters.
* MKVToolNix GUI: multiplexer: the keyboard shortcuts from the "modify
  selected tracks" sub-menu didn't work right after opening a file. They only
  started working after opening the "multiplexer" menu.

Build system changes

* Release v8.0.0 of the `fmt` library is now required. If not found, the
  bundled copy will be used.
* A C++20 compatible compiler is now required for several but certainly not
  all C++20 features. g++ v10 & clang++ v10 should suffice.

mkvtoolnix: updated to 83.0

Version 83.0 "Circle Of Friends" 2024-03-10

New features and enhancements

* translations: added a Belarusian translation of the programs & the man pages
  by prydespar (see `AUTHORS`).
* mkvmerge, MKVToolNix GUI's chapter editor: added support for reading
  chapters from ffmpeg metadata files.
* MKVToolNix GUI: added a new action type for execution after jobs or the
  queue finishes: quitting MKVToolNix.

Build system changes

* The bundled `fmt` library was updated to v10.2.1.

Other changes

* Tons of changes were made to support the latest development versions of
  libEBML & libMatroska.

mkvtoolnix: updated to 82.0

Version 82.0 "I'm The President" 2024-01-02

New features and enhancements

* mkvmerge: Matroska reader: the "video alpha mode" track header property will
 be copied to the output file if present.
* mkvmerge: Matroska reader: the "video alpha mode" track header property will
 be reported in JSON identification mode as the track property
 `alpha_mode`.
* mkvmerge: Matroska reader: the file's timestamp scaling factor will be
 reported in JSON identification mode as the container property
 `timestamp_scale`.
* mkvmerge: MPEG transport stream reader: teletext subtitles intended for
 hearing impaired people (type 0x05) are now marked as such via the
 appropriate flag in the track headers.
* mkvmerge: file identification: the JSON identification output schema version
 has been bumped to 19.
* mkvmerge: added a new hack `always_write_block_add_ids` that can be used as
 a workaround for players that don't support the handling of missing "Block
 Addition ID" sub-elements of "Block More" elements in block additions
 properly. These are used for e.g. alpha channel data in VP9 with a "Block
 Addition ID" value of 1, which is also its default value.
* mkvinfo: added support for the "video alpha mode" track header element.
* mkvpropedit, MKVToolNix GUI's header editor: added support for the "video
 alpha mode" track header property. In `mkvpropedit` it's called
 `alpha-mode`.
* MKVToolNix GUI: multiplexer: when adding files the GUI can automatically
 enable the "hearing impaired" flag for audio and subtitle tracks if the file
 name contains the word "cc" or "sdh" delimited by certain characters
 (configurable). This feature is turned on by default.
* MKVToolNix GUI: multiplexer: when scanning for Blu-ray playlists the GUI
 will now ignore playlists that are likely meant for menus. Currently the GUI
 considers this to be the case when a playlist contains the same item at
 least five times. This behavior can be turned off in the
 preferences.

Bug fixes

* mkvmerge: MPEG transport stream reader: fixed a crash introduced in v81 that
 occurred when there was at least one PCM track that wasn't copied from the
 transport stream file.
* mkvmerge: when reading data from Matroska files damaged in a specific way,
 mkvmerge ended up trying to write various types of elements that aren't
 allowed to be written (so-called `EbmlDummy` elements as well as elements
 that don't have a value set) to the output file, which caused the underlying
 `libebml` library to abort. These types of broken elements are now filtered
 out.

Build system changes

* Qt 5 is no longer supported. Qt 6 is now required for building
 MKVToolNix. This implies that the options to `configure` revolving around
 configuring Qt 5 or choosing between the two have been removed
 (e.g. `--disable-qt6`).
* Qt 6 detection: if detection fails, error messages from `qmake` can now be
 found in `config.log`.
* Qt 6 detection: `configure` will only consider Qt 6.2.0 or newer, not 6.0.x
 or 6.1.y anymore, due to the lack of support for the multimedia module.
* Qt 6 detection: `configure` will now fail to detect Qt 6 if the 'multimedia'
 module is not found by `qmake` (e.g. due to development packages not being
 installed).
* The bundled `fmt` library was updated to v10.1.1.

mkvtoolnix: updated to 81.0

Version 81.0 "Milliontown" 2023-12-02

New features and enhancements

* mkvmerge: MPEG transport stream reader: HEVC/H.265: added support for
 reading single-layer Dolby Vision from Annex B type bitstream read from MPEG
 transport streams.
* mkvmerge: MPEG transport stream reader, HEVC/H.265 elementary stream reader:
 added support for reading dual-layer Dolby Vision with both the base &
 enhancement layers in the same track from Annex B type bitstreams in MPEG
 transport files & elementary stream files.
* mkvmerge: MPEG transport stream reader: HEVC/H.265: implemented combining
 dual-layer Dolby Vision with base & enhancement layers in different
 tracks.
* MKVToolNix GUI: multiplexer: added a new option in the preferences for
 always enabling 'forced' subtitle tracks. A subtitle track is considered to
 be 'forced' if: the corresponding property is set in the source file; the
 track's name contains the word 'forced' (in English); deriving the 'forced
 display' flag from file names is active & the file name matches the
 corresponding pattern. The option is disabled by default.
* MKVToolNix GUI: multiplexer: the functionality for detecting file name
 sequences when adding files can now recognize the patterns used by GoPro's
 cameras for chaptered video files.
* xyzvc_dump: the end position of the current NALU will be output in
 non-portable format as well.
* xyzvc_dump: HEVC: the tool will now also output the inner NALU type of Dolby
 Vision NALUs (`unspec62` and `unspec63`).

Bug fixes

* mkvmerge: when the user requests processing be stopped after the video ends
 `mkvmerge` will now take appending files into account properly. It won't
 stop processing unconditionally after the first file ends anymore.
* mkvmerge: AV1 handling in readers: the readers will now provide the pixel
 dimensions to the AV1 packetizer as early as possible, just like for other
 video packetizers. That way the pixel dimensions are available for
 calculating the display dimensions when command-line options such as
 `--aspect-ratio` & `--aspect-ratio-factor` are used. Before the change the
 calculation was done based on initial pixel dimension values of 0x0,
 resulting in display dimensions of 0x0, too.
* mkvmerge: HEVC/H.265 packetizer: when reading & appending HEVC/H.265 from
 Matroska, MP4/MOV or FLV files the first frame of all the appended files was
 sometimes dropped, resulting in broken video at the point where video is
 appended.
* mkvmerge: MPEG transport stream reader: when reading MPEG transport streams
 from Blu-rays the four-byte long `TP_extra_header` structure in front of the
 transport packets are now skipped properly. Before the fix a stray byte with
 value of `0x47` inside that `TP_extra_header` structure could have thrown
 off the detection of where the transport packets start, leading to mkvmerge
 dropping a few audio and/or video frames at the start of the file.
* mkvextract: AAC extractor: when an invalid program config element in the
 GA-specific config element is encountered, the program config element will
 be disregarded, which avoids mkvextract aborting with an exception.
* xyzvc_dump: fixed the tool aborting with an exception when the last NALU in
 an Annex B type file was shorter than four bytes.

Other changes

* AVC & HEVC dumper development tool: the tool has been renamed from
 `xvc_dump` to `xyzvc_dump` as `xvc` is an abbreviation for an existing video
 codec (Extreme Video Coding), and the tool has nothing to do with that
 codec.

mkvtoolnix: updated to 80.0

Version 80.0 "Roundabout" 2023-10-29

New features and enhancements

* MKVToolNix GUI: if the system's locale uses one of the Han scripts, the GUI
  will force Arabic numerals to be used in spin boxes. This prevents Suzhou
  numerals from being used which seems to be the default on Windows systems
  sold in China.

Bug fixes

* build system: fixed detection of Qt6 if `clang` is used for compilation on
  Linux. In that case Qt's `qmake` added a `gcc`-specific option that `clang`
  doesn't understand, `-mno-direct-extern-access`. `configure` will now pass
  the parameter `-spec linux-clang` to `qmake` so that it uses the correct
  compiler flags.
* build system: fixed the use of `mktemp` to be more portable to
  e.g. macOS.
* mkvmerge: if a video aspect ratio was given with `--aspect-ratio-factor`,
  the code would apply a second factor based on the pixel resolution,
  resulting in much too large values for the `DisplayWidth` element. For
  example, with a pixel resolution of 720x520 & an aspect ratio factor of 1/1
  the result should be 720x520, but instead it was 900x520. Up until release
  76.0 this has only happened when a track order was given (which
  unfortunately includes all invocations with MKVToolNix GUI as it always
  includes the track order). Starting with release 77.0 this has always
  happened due to the automatic sorting of tracks implicitly creating a track
  order, even if none was given.

mkvtoolnix: updated to 79.0

Version 79.0 "Funeral Pyres" 2023-08-20

New features and enhancements

* mkvmerge: AV1: added support for reading Dolby Vision from AV1 IVF & OBU
  streams. Patches by Quietvoid.
* mkvmerge: MPEG TS reader: added support for colors in teletext
  subtitles. Patch by Angela Schmid.
* MKVToolNix GUI: multiplexer: when adding files the GUI can automatically
  enable the "forced display" flag for subtitle tracks if the file name
  contains the word "forced" delimited by certain characters
  (configurable). This feature is turned on by default.
* MKVToolNix GUI: multiplexer: added the option `--stop-after-video-ends` to
  the dialog for additional command line options.
* MKVToolNix GUI: multiplexer: when adding Blu-ray playlists the dialog
  allowing the user to select the playlist to add will now show audio & video
  track properties as well (pixel dimensions for video; sampling frequency,
  channels for audio).
* MKVToolNix GUI: header editor: in order to reduce confusion with users non
  that versed in Matroska elements, the naming of the two "language" track
  properties has been changed: the old element is now titled "Language
  (obsolete)" & the current, IETF BCP 47 based one is simply called
  "Language".
* MKVToolNix GUI: preferences: you can now use the "delete" key to remove
  entries from simple list widgets for strings (e.g. the list of recently used
  destination directories).

Bug fixes

* mkvmerge: DTS reader: if a DTS stream doesn't start with a DTS core but a
  sub-stream element (EXSS), the reader will now look for a core. If found,
  it'll start processing from there instead of from the start. This fixes the
  timestamp calculation if the sampling frequency in the core & in the
  extensions are different.
* MKVToolNix GUI: multiplexer: the "emphasis" and "stereoscopy" combo-boxes
  now have a much smaller minimum width, allowing to make the whole
  "properties" pane much smaller again.
* MKVToolNix GUI: macOS: when you install the application from the DMG it'll
  no longer register itself as an alternate handler for its supported file
  types. It seems like this overrode existing associations, forcing people to
  change them manually to whatever they wanted them to be. Additionally this
  forced the associated file to always be shown with an MKVToolNix icon. The
  GUI's own `.mtxcfg` files will still be registered.

mkvtoolnix: updated to 78.0

Version 78.0 "Running" 2023-07-02

New features and enhancements

* MKVToolNix GUI: header editor: for files that only contain legacy track
  language elements but no IETF language elements the header editor will now
  derive the IETF language elements from the legacy elements.
* AppImage: the AppImage is now built on AlmaLinux 8 with Qt 6.5.1. This means
  that the minimum glibc version this AppImage is compatible with has also
  been bumped, to v2.28. The oldest Debian coming with this version is Debian
  10 "Buster"; for Ubuntu it's 18.10 "Cosmic Cuttlefish".
* Windows installer: the installer will now remove the file
  `data\portable-app` if it's present in the installation directory as its
  presence would signal to the app to run in portable mode, requiring write
  access to its base directory. This fixes some installation issues that could
  occur when a user extracted a portable app archive into a folder like
  `C:\Program Files\MKVToolNix`. Also added an installation check for the same
  issue.

Bug fixes

* all: Linux: if initializing the locale system based on the system's settings
  fails, e.g. if environment variables such as `LC_ALL` have been set to
  `fr_FR.UTF-8` but the locale for `fr_FR.UTF-8` hasn't been built, MKVToolNix
  will try to fall back to `en_US.UTF-8` first & `C.UTF-8` second. If neither
  of the three succeeds, an error message will be shown, and the program will
  abort. This fixes the programs not catching an exception from the
  `boost::filesystem` library which doesn't cope with mis-configured locale
  systems well.
* mkvmerge: sorting tracks by type did not work properly when some tracks
  weren't copied.
* mkvmerge: track numbers in the destination file were assigned out-of-order
  when the track order in the source files differs from the one in the
  destination file. Now they're assigned sequentially in the order the tracks
  appear in the destination file again.
* MKVToolNix GUI: under certain circumstances the GUI would try to display
  error messages from a secondary thread, which isn't allowed in Qt, causing
  to program to either hang or outright crash.
* MKVToolNix GUI: the GUI will check for several potential installation issues
  wrt. to having write access to certain directories (system's temporary
  directory, MKVToolNix's file identification cache directory and others) &
  display proper error messages if not.
* MKVToolNix GUI: header editor: fixed the application crashing whenever you
  change a property below the "segment information" node. This bug was
  introduced in v77.
* MKVToolNix GUI: header editor: when reading files that only contain legacy
  track language elements but no IETF track language elements, the header
  editor was showing all tracks as having "English" as the language. This bug
  was introduced in v77.
* MKVToolNix GUI: header editor: when a legacy track language element contains
  a country code (e.g. `fr-CA`), the header editor was wrongfully using `und`
  = "undetermined" as the language for that element. Now it'll use the
  language from the language/country pair, which would be `fr` in the earlier
  example.
* MKVToolNix GUI: header editor: the keyboard shortcuts from the "modify
  selected track" sub-menu didn't work right after opening a file. They only
  started working after opening the "header editor" menu.
* AppImage: fixed the GUI resources (e.g. icons) not being found.
* AppImage: the Qt plugins required for using compose key/dead keys are now
  included.

Build system changes

* The compilation database (`compile_commands.json`) is now always built. The
  variable `BUILD_COMPILATION_DATABASE` is not evaluated anymore.

mkvtoolnix: updated to 77.0

Version 77.0 "Elemental" 2023-06-04

New features and enhancements

* mkvmerge: tracks in the destination file will now be sorted by their type
  automatically unless the track order is specified with the `--track-order`
  option. The order is as follows: video tracks first followed by audio &
  subtitle tracks with other rarely used types of tracks last. Tracks of the
  same type will be sorted in the same order as their source files occur in
  the command-line arguments. Note that this doesn't affect file
  identification.
* MKVToolNix GUI: multiplexer: the default list colors used for distinguishing
  source files does not include the darkest tier anymore (the ones where one
  or two components are set to the value 0x3f) as they're hard to distinguish
  from each other. Only affects new installations, or when the user presses
  the "reset to default colors" button.
* MKVToolNix GUI: multiplexer: the GUI will now check the state of the 'track
  enabled' flag of all video, audio & subtitle tracks when starting to
  multiplex or adding a job to the job queue. If there's no track with its
  flag turned on for a type, the GUI will turn on the flag for the first track
  of the type. This behavior can be turned off in the preferences.
* MKVToolNix GUI: header editor: the columns in the tracks/attachments view
  and the values on the "track type" page will now be updated each time a
  corresponding property is changed (e.g. when a track's name is changed)
  instead of showing what's in the file on disk.
* MKVToolNix GUI: macOS: when you install the application from the DMG it'll
  register itself as an alternate handler for its supported file types. This
  allows the use of the "Open with" context menu action in Finder.
* MKVToolNix GUI: Windows: a new settings in the preferences lets the user
  chose whether to use the light or the dark color palette, or to follow the
  system settings.

Bug fixes

* Fixed compilation with fmt v10.0.0.
* mkvmerge: fixed several instances of wrong format strings for `fmt::format`
  used in debug messages.
* mkvmerge: AV1 packetizer: the packetizer did not honor the aspect ratio
  (factor) given on the command-line via the `--aspect-ratio` or
  `--aspect-ratio-factor` options.
* mkvmerge: JSON identification: cropping parameters are reported again even
  if some of the four values are not present in the file or set to 0.
* mkvmerge: Windows: when writing to a network share connected via SMB1
  `mkvmerge` was aborting with a error about `create_directory() failed` with
  existing directories. This was due to a bug in recent versions of the
  Boost.Filesystem library. The Windows version of MKVToolNix will be built
  with Boost 1.82.0 from now on which includes the fix.
* MKVToolNix GUI: the defunct "disable the dark mode" checkbox was removed
  from the preferences.
* MKVToolNix GUI: language dialog: under certain conditions the controls for
  the individual components remained disabled when the dialog is opened even
  though editing of individual components is selected.
* MKVToolNix GUI: language dialog: the controls for the individual components
  weren't re-initialized properly after opening the dialog for the second &
  all following times, potentially leaving previously selected/entered entries
  intact, primarily when editing multiple tracks at once.
* MKVToolNix GUI: header editor: using the actions from the "modify selected
  track" context menu only worked if the user right-clicked on the first
  column in the view. They now work for clicks on any of the columns.
* MKVToolNix GUI: header editor: some of the actions toggling specific flags
  from the "modify selected track" did not work correctly if the flag wasn't
  currently present in the file, especially if the underlying value has a
  default value in the Matroska specs.
* MKVToolNix GUI: Windows: the GUI will now always use its own implementation
  of light & dark palettes instead of relying on Qt. This circumvents two
  issues with the palette support in Qt 6.5.0:
  1. if Windows 11's dark application mode is active, links were displayed in
     a hard-to-read dark blue.
  2. for unknown reasons the the dark palette was not chosen on some Windows
     11 installations even though Windows 11's color mode was set to "dark".

Build system changes

* The bundled `fmt` library was updated to v10.0.0.
* MKVToolNix GUI now uses an external Qt resource file instead of compiling it
  into the executable. The resource file has reached a size at which the C++
  compiler exhausts available virtual memory on some 32-bit architectures. On
  Windows & macOS the GUI will look for the file in
  `<folder_with_executables>/data/qt_resources.rcc`, and in the directory set
  with `configure`'s `--datadir` parameter on other systems (which usually
  means `/usr/share/mkvtoolnix`). The `install` build system commands installs
  it into that folder.

mkvtoolnix: fix build with fmtlib 10 using upstream patches.

mkvtoolnix: updated to 76.0

Version 76.0 "Celebration" 2023-04-30

Important notes

* mkvmerge: removed the option `--blockadd`. Removing block additional data is
  not possible anymore, as it is often required for proper decoding.

New features and enhancements

* mkvmerge: JSON file identification: added a child element called
  `num_index_entries` to the `properties` track element containing the number
  of index entries found for a track. Currently only implemented for Matroska
  files where it contains the number of cue points.
* mkvmerge: the maximum block addition ID track header value is now calculated
  automatically from both the existing mappings & the actually used block
  additions in the block groups.
* mkvmerge: Matroska reader: when reading WebM files that use block additions
  with ID 4 (HDR for VP9) an appropriate block addition mapping will be
  created automatically.
* mkvmerge: MP4 reader: the title/movie name meta data (content of the
  `udta.meta.ilst.©nam` atom) will now be copied over as the segment title
  track header attribute.
* mkvmerge: MP4 reader: the comment & encoder meta data (content of the
  `udta.meta.ilst.©cmt` & `….©too` atoms) will now be copied over as global
  tags `COMMENT` & `ENCODER` respectively.
* mkvmerge, MKVToolNix GUI's multiplexer: added an option to stop processing
  after the primary video track ends called `--stop-after-video-ends`. This
  discards any remaining packets of other tracks.
* MKVToolNix GUI: only on Windows: the GUI now uses Qt's "Fusion" style
  instead of the deprecated "Windows Vista" style. The advantage is that as of
  Qt 6.5 the "Fusion" style properly supports Windows 10's & 11's dark
  application mode. The Windows binaries are now built with said Qt
  version. Therefore the option to disable the dark mode has been
  removed.
* MKVToolNix GUI: multiplexer: automatically setting the destination file
  name: added an option in the preferences for using the first source file's
  directory name instead of its file name as the basis for the destination
  file name.
* MKVToolNix GUI: multiplexer: double-clicking on certain columns in the
  "tracks" view will now toggle them directly (columns "Default track" &
  "Forced track") or activate the corresponding control (columns "Language",
  "Name" & "Delay"). Double-clicks on other columns will do what they've done
  before, too: toggling the "Copy item" state.
* MKVToolNix GUI: the dialog for editing language tags is now created only the
  first time the user wants to edit a language tag & cached afterwards instead
  of creating a new instance each time. This makes subsequent uses instant.

Bug fixes

* mkvmerge: mkvmerge will now only try to probe for VobSubs if the name of the
  file to identify ends in either `.idx` or `.sub`, preventing
  mis-identification of other file types if VobSubs with the same base name
  exist in the same directory.
* mkvmerge: AC-3: mkvmerge will now skip certain types of garbage data (16
  bytes starting with 0x01 0x10) that can occur before each sync frame,
  fixing the file not being identified as AC-3.
* mkvmerge: Matroska reader: when reading files that use block additions with
  IDs other than 1 (e.g. 4 for HDR for VP9) the IDs will now be kept & written
  to the output file. Before no ID would be written, effectively using 1 as
  that's the default value for the corresponding element.
* mkvmerge: mkvmerge will no longer write block addition mappings or the max
  block addition ID track header elements when creating a WebM file as those
  elements aren't supported there.
* mkvpropedit: fixed replacing chapters & tags in files that don't contain
  tracks.

mkvtoolnix: updated to 75.0.0

Version 75.0.0 "Goliath" 2023-03-26

New features and enhancements

* mkvmerge: MP4 reader: mkvmerge will now read Timed Text (FourCC `tx3g`)
  subtitle tracks & convert them on the fly to Matroska's simple text subtitle
  format (`S_TEXT/UTF8`; text only, no styles).

Bug fixes

* all: switched back to using `boost::filesystem` functions for creating
  directories instead of the ones introduced to work around bugs in
  `std::filesystem`. The latter didn't work correctly with UNC paths after the
  switch to `boost::filesystem::path` in v74.
* mkvmerge: VobSub reader: mkvmerge will now probe the `.idx` file during
  VobSub identification even if the `.sub` file is passed as the
  source. Avoids mis-detection of the `.sub` as MPEG program streams.
* MKVToolNix GUI: the GUI could abort with an exception on startup while
  looking for the `mkvmerge` or `mediainfo` executables due to inaccessible
  folders.
* MKVToolNix GUI: preferences: when opening the preferences the first time the
  UI might pre-select the first entry in the list of interface languages if
  the operating system's language is not available for MKVToolNix. This might
  also happen on Linux if e.g. `en_GB` is set, even though `en_US` is
  available. Now English (`en_US`) will be selected instead.
* MKVToolNix GUI: multiplexer: when adding files the GUI has special handling
  for chapter/tags/segment info files. This is done by comparing their content
  to certain patterns. This recognition could wrongfully be triggered if any
  such file was embedded in another file verbatim, e.g. with a chapter XML
  file attachment in a Matroska file. When trying to add that Matroska file,
  the GUI would treat it as a chapter file instead of a regular one. This
  content-based detection was fixed.

Other changes

* mkvpropedit, GUI's header editor: removed support for the deprecated
  "minimum cache" & "maximum cache" track header elements.

mkvtoolnix: updated to 74.0.0

Version 74.0.0 "You Oughta Know" 2023-02-12

New features and enhancements

* mkvmerge: SRT handling: added a hack called `--engage
  keep_whitespaces_in_text_subtitles` which disables stripping whitespaces
  from the start & end of each line of SRT entries during muxing.

Bug fixes

* all: Windows: UNC paths of type `\\?\C:\…` are supported again by switching
  back to Boost's file system library instead of using C++17's file system
  library.
* mkvmerge: AVC/H.264 & HEVC/H.265 packetizers: when appending tracks the
  pixel dimensions will be checked & muxing will be aborted if they don't
  match.
* mkvmerge: file type detection: file types that can be detected unambiguously
  by their content (e.g. Matroska, MP4, WAV…) will now preferred in the
  detection order over file types based on their extension. Prevents certain
  cases of mis-detection, e.g. DTS in WAV but with a file name extension of
  `.dts` being detected as the wrong type of DTS.
* mkvmerge: SRT handling: whitespaces will now be stripped from the start &
  the end of each line of each entry, not just from the end of the last
  line.
* mkvextract: SRT extraction: whitespaces will not be stripped from the start
  & end of the whole entry anymore.
* MKVToolNix GUI: multiplexer: when adding multiple files that include certain
  file types (chapters, segment info and tag files) and when the choice where
  to add them is "all files to a single new tab", these certain file types
  will now be added in the newly added tab as well instead of the current tab
  that had already been open.
* build system: fixed compatibility with Ruby 3.2.0 by using `FileTest.exist?`
  instead of `File.exists?`, `Dir.exists?` & `FileTest.exists?` which were
  removed in that release.

Build system changes

* MKVToolNix is now using & requiring Boost's "file system" and "system"
  libraries again instead of C++17's file system library. This is due to gcc's
  library not supporting UNC paths of types `\\?\C:\dir\file.ext`.

mkvtoolnix: updated to 73.0.0

Version 73.0.0 "25 or 6 to 4" 2023-01-02

New features and enhancements

* mkvmerge: greatly enhanced the speed of Base64 decoding which is used used
  e.g. when reading pictures embedded in Ogg or FLAC files or for binary data
  inside XML chapter & tag files. Even small blocks of data could take
  unreasonably long.
* mkvmerge: added support for reading HEVC/H.265 video from FLV
  containers.

Bug fixes

* mkvmerge: splitting: fixed a typo in the string output in GUI mode regarding
  the timestamps before which splitting was done.
* MKVToolNix GUI: job output: after having run multiple jobs the "Clear
  output" functionality only reset the visible parts. However, using the "save
  output" function would also save the output generated before the user used
  "clear output". Now only the output after the last use of "clear output" is
  saved.
* build system: when probing for the FLAC library the Ogg libraries will be
  linked with the compiled test program as well. This fixes detection if the
  `pkg-config` settings for FLAC don't list Ogg & the linker doesn't find the
  library automatically (e.g. for my macOS builds).

mkvtoolnix: fix buildling without po4a

mkvtoolnix: updated to 72.0.0

Version 72.0.0 "Minuano (Six-eight)" 2022-11-13

New features and enhancements

* mkvmerge: AV1 parser: the variable-width OBU size field will be re-written
  with minimal length if it's encoded longer than necessary.
* mkvmerge: when splitting is active the program will output the timestamps
  actually used for making the decision when to split. If GUI mode is active,
  a specially formatted line `#GUI#splitting_before_timestamp <timestamp>` is
  output as well. Lines prefixed with`#GUI#` are suitable for machine parsing,
  won't be translated and are guaranteed not to change in format.
* MKVToolNix GUI: multiplexer: when dragging & dropping directories to the
  "attachments" tab, the files contained in those directories will be
  attached.
* MKVToolNix GUI: info tool: added information about the file (directory,
  size, modification timestamp) at the top of each tab.

Bug fixes

* mkvmerge: AV1 parser: fixed the parser completely aborting when parsing the
  OBU size field fails due to there not being enough data to parse. Instead
  the parser will remember the last known-good position & restart from there
  after more data is available.
* mkvmerge: HDMV PGS subtitles: reverted the change that implemented a
  heuristic for detecting bogus timestamps & attempting to fix them. This was
  done to fix 3268. Unfortunately this affected valid subtitle files with
  intentional huge gaps in timestamps, e.g. forced subtitle tracks. The
  heuristic has simply been removed, fixing 3392.
* mkvmerge: Matroska reader: fixed reading files with EBML Void elements
  before the Matroska Segment element.
* mkvmerge: fixed reversed attachment selection: `--attachments !4` would not
  copy any attachment instead of all attachments but the one with ID 4.
* mkvextract: IETF BCP 47/RFC 5646 language tags: mkvextract will now use &
  prefer IETF BCP 47 track language elements if they're present. Only affects
  the VobSub & USF subtitle extraction.
* mkvpropedit, MKVToolNix GUI's chapter & header editors: updated the list of
  deprecated Matroska elements. The applications will no longer try to write
  those elements, even if they're found in the file to be modified. The
  programs will no longer abort with error messages such as `assertion "false"
  failed`.
* mkvpropedit, MKVToolNix GUI's chapter & header editors: when the Matroska
  version numbers stored in the EBML Head element are updated, the updated
  EBML Head element might be smaller than the existing one. In that case the
  programs used to shrink the EBML Head & write a small EBML Void element
  between the updated EBML Head & the following element, usually a Matroska
  Segment element. This isn't widely supported by programs including
  MKVToolNix itself, causing them to declare such files as invalid. The
  programs will now create the EBML Void element inside the EBML Head element,
  making them a level 1 element instead of a level 0 element.
* mkvpropedit, MKVToolNix GUI's chapter & header editors: often the programs
  have to relocate the Master elements in which the modifications were
  done. In that case the Seek Head elements must also be updated to reflect to
  the Master elements' new positions. If a file contained a Seek Head element
  at the start already and if that Seek Head was too small to contain the
  updated positions, the programs would end up in an endless loop trying to
  write data to the end, creating ever-growing files. This is now handled
  properly by voiding this too-small Seek Head & finding a proper space for a
  new one instead.
* MKVToolNix GUI: header editor: fixed pixelated icons on higher display
  scaling values.

Build system changes

* bug fix: libFLAC detection is now done via `pkg-config`, and the
  corresponding compiler flags are honored. Fixes static compilation with
  newer versions of libFLAC with MXE where a compiler definition is required
  to signal that it libFLAC wasn't built as a DLL.

mkvtoolnix: updated to 71.1.0

Version 71.1.0 "Fortitude" 2022-10-09

Bug fixes

* Chapters DTD: added the new edition & chapter elements from Matroska v5.
* Chapters DTD: fixed EditionUID being mandatory. mkvmerge can auto-generate
  it if it's missing from the XML file.
* Chapters DTD: fixed the `example-chapters-1.xml` not validating against the
  DTD.
* Chapters DTD: corrected the old name `EditionManaged` to
  `EditionFlagOrdered`.
* Chapters DTD: fixed `ChapLanguageIETF` missing its element declaration &
  `ChapterLanguage` being required.
* XML DTDs: fixed elements representing binary data not allowing the `format`
  attribute.

Build system changes

* bug fix: configure accidentally tested for libEBML ≥ 2.0.0 & libMatroska ≥
  2.0.0, even though the actual requirements are 1.4.4 & 1.7.1 respectively.


Version 71.0.0 "Altitude" 2022-10-08

New features and enhancements

* mkvmerge, MKVToolNix GUI's multiplexer: added support for the Emphasis audio
  track header element via the `--audio-emphasis` option. It is also read from
  Matroska files.
* mkvmerge: the options `--list-stereo-modes` and `--list-audio-emphasis` have
  been added to list all support numerical & textual values for the
  `--stereo-mode` & `--audio-emphasis` options.
* mkvpropedit, MKVToolNix GUI's header editor: added support for the Emphasis
  audio track header element via the `emphasis` property.
* MKVToolNix GUI: multiplexer: when the track properties are
  configured to be displayed in a tab widget below the files & tracks
  in the "Input" tab, the "Color information" tab will be laid out in
  two columns. This reduces the minimum height the whole tab widget
  requires.
* MKVToolNix GUI: greatly sped up closing the preferences dialog by only
  re-running certain initialization functions when their corresponding
  settings have changed.
* mkvinfo, MKVToolNix GUI's info tool: added support for the following new
  elements from Matroska v5: Emphasis audio track header element; Chapter Skip
  Type; Edition Display; Edition String; Edition Language IETF.
* mkvmerge, mkvpropedit: added support for the following new chapter elements
  from Matroska v5: Chapter Skip Type; Edition Display; Edition String;
  Edition Language IETF. The GUI's chapter editor will receive support for
  them in the next release.

Bug fixes

* mkvmerge: Ogg/OGM reader: mkvmerge will now correctly skip tracks of
  unsupported types as well as tracks for which all track header pages
  haven't been found.

Build system changes

* libEBML 1.4.4 & libMatroska 1.7.1 are now required.
* The bundled libEBML & libMatroska libraries were updated to v1.4.4 & v1.7.1
  respectively.
* The bundled `fmt` library was updated to v9.1.0.
* The bundled `nlohmann-json` library was updated to v3.11.2.

mkvtoolnix: updated to 70.0.0

Version 70.0.0 "Caught A Lite Sneeze" 2022-08-14

New features and enhancements

* MKVToolNix GUI: the user can now control where the job queue files & the
  preferences INI file are stored via environment variables. If set, the
  variable `MKVTOOLNIX_GUI_STATE_DIR` can point to a directory where the GUI
  stores both the job queue sub-directory and the preferences INI file. If you
  only want to relocate the preferences INI file, you can store the desired
  file name for the INI file in `MKVTOOLNIX_GUI_CONFIG_FILE`.
* MKVToolNix GUI: when adding directories via drag & drop/copy & paste the GUI
  will now offer the user the option to create one multiplex settings tab per
  directory & adding all files from that directory to the corresponding, newly
  created tab.

Bug fixes

* mkvmerge: AV1 OBU parser: fixed identifying files that only contain single
  frame.
* MKVToolNix GUI: multiplexer: when reading color parameters from identified
  files that are floating point numbers (minimum/maximum luminance, projection
  pitch/roll/yaw) the numbers will be formatted in floating-point notation
  instead of scientific notation as mkvmerge only supports the former.
* MKVToolNix GUI: multiplexer: color parameters that are floating point
  numbers (minimum/maximum luminance, projection pitch/roll/yaw) will only be
  set to a value during identification if the identification actually contains
  the property, and not to 0 anymore if it doesn't.

Build system changes

* Several merge requests where accepted that improve compilation on MSYS2 on
  Windows. Note that this build type isn't supported.

mkvtoolnix: updated to 69.0.0

Version 69.0.0 "Day And Age" 2022-07-09

Important notes

* all: the spelling of "colour" was changed to "color" throughout all programs
  to match the use of American English spelling in MKVToolNix. This not only
  affects documentation and user interface controls, but also program options
  for mkvmerge & mkvpropedit. Both programs will continue to accept the
  British English spelling of their respective options indefinitely. One
  breaking change is that the property names in mkvmerge's JSON identification
  mode have also been changed to American English spelling. As those
  properties have only been introduced in release v68, this seems like a small
  enough window to make such a change.

New features and enhancements

* MKVToolNix GUI: the number of recently used entries (e.g. destination
  directories) remembered by the GUI can now be configured in the
  preferences.
* MKVToolNix GUI: multiplexer: when adding files the track properties
  regarding color information & color mastering meta information will be
  parsed & set in the corresponding GUI controls.
* MKVToolNix GUI: job queue: the job queue can now be sorted by clicking on
  the column headers.
* MKVToolNix GUI: job queue: when loading jobs from the queue directory that
  weren't previously known to the program those jobs will be sorted by their
  "date added" timestamp instead of using the order the operating system
  returns them in.

Bug fixes

* build system: fixed compilation with fmt v9.
* mkvmerge: HEVC ES parser: the parser will now parse at least the first full
  access unit before reporting that it has found all the required
  headers. Otherwise parsing might stop in the middle of the access unit due
  to the source reader not providing more data in the first call, leading to
  the parser not finding the `unspec62` and `unspec63` NALUs required for
  Dolby Vision.
* MKVToolNix GUI: preferences: the default actions added to the "execute
  programs" section on new installations now default to use WebM file names
  instead of Ogg, matching the format of the included audio files.

Build system changes

* The bundled `fmt` library was updated to v9.0.0.

mkvtoolnix: updated to 68.0.0

Version 68.0.0 "The Curtain" 2022-05-22

New features and enhancements

* mkvmerge: HDMV PGS subtitles: mkvmerge now tries to detect bogus timestamps
  (where the current timestamp is two hours or more after the previous
  timestamp) & correct them to something more sensible (1s after the previous
  timestamp). That way one bogus timestamp cannot cause the rest of the frames
  to not be interleaved properly with the other audio & video
  packets.
* mkvmerge: added colour information, colour mastering meta information &
  video projection information properties to the JSON identification
  format. The properties are reported for container types for which mkvmerge
  supports reading them (Matroska & MP4). The JSON identification format
  version number has been bumped to v15.
* MKVToolNix GUI: multiplexer: added controls for all the video colour
  information & the video projection information.

Bug fixes

* mkvmerge: SRT reader: entries with a duration of 0 or less will now be
  skipped.
* mkvpropedit, MKVToolNix GUI's chapter & header editors: fixed an invalid
  memory access when trying to update existing Matroska files whose EBML Head
  element had a "size" field length of eight bytes, and where rewriting said
  element would shrink the element by one byte. Files created by gstreamer fit
  the first part whereas the second depends on the changes requested by the
  user.
* mkvpropedit, MKVToolNix GUI's chapter & header editors: fixed the programs
  not handling having to remove EBML void elements at the end of the file
  correctly and consequently aborting.
* MKVToolNix GUI: the GUI now uses almost all SVG icons, allowing proper
  scaling even for scaling factors such as 125%.
* MKVToolNix GUI: when compiled with Qt 5 the character set of INI files is
  forced to UTF-8 in order to fix reading INI files written by a version
  compiled with Qt 6.

Build system changes

* Qt's SVG library is now required.

mkvtoolnix: updated to 67.0.0

Version 67.0.0 "Under Stars" 2022-04-10

New features and enhancements

* all: IETF BCP 47/RFC 5646 language tags: when deriving the legacy language
  element codes to use a language tag's ISO 639 code is also potentially
  interpreted as an & its prefix is used as the legacy language code. For
  example, "Yue Chinese" = `yue` is not part of ISO 639-2. However, there is
  an extlang subtag `yue` with a valid prefix of `zh` ("Chinese"), and for
  "Chinese" there is an ISO 639-2 language code: `chi`. In this example the
  IETF language element would be set to `yue` and the corresponding legacy
  element to `chi`.
* all: IETF BCP 47/RFC 5646 language tags: grandfathered language tags are now
  supported.
* all: IETF BCP 47/RFC 5646 language tags: all deprecated subtags from the
  IANA language subtag registry are now supported.
* all: IETF BCP 47/RFC 5646 language tags: all lists of valid subtags have
  been updated from their respective authoritative sources.
* all: IETF BCP 47/RFC 5646 language tags: all in the IANA language subtag
  registry are now supported, even those marked as deprecated and of type
  'grandfathered'.
* all: IETF BCP 47/RFC 5646 language tags: reduced the maximum number of
  extended language subtags that are present in a valid tag from 3 to 1 in
  compliance with RFC 5646 section 2.2.2.
* all: IETF BCP 47/RFC 5646 language tags: all language codes reserved for
  private/local use (`qaa`–`qtz`) are now supported.
* all: IETF BCP 47/RFC 5646 language tags: Digital Cinema Naming Convention
  language codes that fall into the IETF BCP 47 range of "private use" tags
  (`qaa`–`qtz`) are now replaced by their IETF BCP 47 equivalents during
  normalization (e.g. `QMS` → `cmn-Hans`).
* all: added a new translation to Chinese Simplified (Singapore) by Dian Li.
* mkvmerge, mkvpropedit: added a new command line option called
  `--enable-legacy-font-mime-types`. With this option on the two programs will
  use the same legacy MIME types for fonts whenever new attachments are added
  (both programs), when reading existing attachments (only `mkvmerge`) or when
  replacing existing ones (only `mkvpropedit`).
* mkvmerge, mkvpropedit: IETF BCP 47/RFC 5646 language tags: added a command
  line option `--normalize-language-ietf <mode>` which turns on normalization
  of IETF BCP 47 language tags to either their canonical (mode `canonical`) or
  extended language subtags form (mode `extlang`) or turns it off (mode
  `off`). If the option isn't given, language tags will now be normalized to
  the canonical form.
* MKVToolNix GUI: IETF BCP 47/RFC 5646 language tags: ISO 639-3 and 639-5
  languages will now be used by default.
* MKVToolNix GUI: IETF BCP 47/RFC 5646 language tags: the language editor
  dialog will now show warnings in several cases: when deprecated tags are
  used; when the tag's canonical and/or extlang forms differ from the user
  input.
* MKVToolNix GUI: IETF BCP 47/RFC 5646 language tags: the language editor now
  has a button to replace the current tag with a normalized form (canonical or
  extlang) if those differ from the current tag.
* MKVToolNix GUI: IETF BCP 47/RFC 5646 language tags: added an option in the
  preferences to always normalize all language tags to their canonical or
  extlang forms or to turn normalization off. Can also be enabled from the
  language editor dialog.
* MKVToolNix GUI: IETF BCP 47/RFC 5646 language tags: the language dialog now
  shows a warning if a variant is used with a prefix that isn't in the
  variant's list of suitable prefixes. It'll also say if the corresponding
  canonical/extlang forms would have a suitable prefix.
* MKVToolNix GUI: IETF BCP 47/RFC 5646 language tags: the language dialog now
  shows a warning if a script is used with a language for which it should be
  suppressed.
* MKVToolNix GUI: multiplexer: the track property group boxes in the
  scrollable pane are now collapsible & expandable, saving their state over
  restarts of the GUI. This is in preparation of adding many more track
  properties in future releases, allowing the user to hide parts they don't
  use all that often.
* MKVToolNix GUI: multiplexer: if the option "use legacy font MIME types" is
  enabled in the preferences, the new command line option
  `--enable-legacy-font-mime-types` will be passed to `mkvmerge` in order to
  have it remap the MIME types of existing attachments, too.

Bug fixes

* all: IETF BCP 47/RFC 5646 language tags: variants aren't validated wrt. to
  prefixes anymore as BCP 47 doesn't actually pose restrictions on them,
  saying only that prefixes "are suitable sequences" for use with the
  variants. What is now verified, though, is that no variant is used multiple
  times within the same language tag.
* build system & MKVToolNix GUI: fixed detecting the presence of & the
  compilation with the multimedia module of Qt version 6.2.0 and newer.
* build system: fixed compilation on Unices other than Linux & macOS
  (e.g. FreeBSD).
* MKVToolNix GUI: job queue: fixed compiling in the audio player code for the
  the "play audio" end-of-job action.
* MKVToolNix GUI: multiplexer: recognizing added XML chapter, segment info or
  chapter files required the XML declaration & root node (e.g. `<?xml…?> …
  <Chapters>` for chapters) be located within the first 1 KB, which wasn't
  enough for files that contain a lot of comments at the start like the
  included `example-chapters-2.xml`. The detection range was extended to 10
  KB.

Build system changes

* build system: the provided Windows binaries are now compiled with Qt 6. A
  drawback is that certain audio formats aren't supported anymore by Qt for
  the "end of job" sound notification playback, notably the Ogg file format &
  the Vorbis audio codec. MKVToolNix therefore now ships Opus-in-WebM files
  for the same purpose.
* The bundled `fmt` library was updated to v8.1.1.
* The bundled `nlohmann-json` library was updated to v3.10.5.
* The bundled `pugixml` library was updated to v1.12.1.

mkvtoolnix: updated to 66.0.0

Version 66.0.0 "Josie" 2022-03-13

New features and enhancements

* mkvpropedit: added a new option `--chapter-charset` allowing the user to
  specify the character set to use when reading the following chapter
  file.
* MKVToolNix GUI: each language shortcut can now be associated with an
  optional track name that is set along with the language when the shortcut is
  used.

Bug fixes

* mkvmerge: Ogg/OGM reader: mkvmerge will no longer abort with an exception
  when it encounters Vorbis comments that contain data that isn't valid
  UTF-8.
* MKVToolNix GUI: multiplexer: fixed several issues with the tab order of
  elements in the "properties" pane and the "output" tab. Also fixed the
  language display widgets (e.g. "track language" in the "properties" pane)
  never receiving tab focus.
* MKVToolNix GUI: multiplexer: the chapter name template will now be passed to
  `mkvmerge` if a chapter file is selected on the "output" tab.

mkvtoolnix: updated to 65.0.0

Version 65.0.0 "Too Much" 2022-02-06

New features and enhancements

* mkvmerge: the options `--default-track` and `--forced-track` have been
  renamed to `--default-track-flag` and `--forced-display-flag` respectively
  for improved consistency with other option names & the wording used in the
  GUI. However, the old names will be supported and recognized
  indefinitely. What will remain unchanged is the property names for those
  flags in mkvmerge's identification output. Existing third-party programs
  will continue working as they are.
* mkvmerge: added a new option `--track-enabled-flag` to set or unset the
  "track enabled" track header flag.
* mkvmerge: MP4 reader: `mkvmerge` will now evaluate the `flags` field of the
  track header atom (`tkhd`) and set the track's "enabled" flag
  accordingly.
* MKVToolNix GUI: multiplexer: added support for the "track enabled" track
  header flag.
* MKVToolNix GUI: multiplexer, header editor: added several menu entries &
  keyboard shortcuts for toggling various track flags of the currently
  selected tracks, e.g. `Ctrl+Alt+F, D` (that's `Ctrl` and `Alt` with `F`
  simultaneously followed by `D` without any other key pressed) for toggling
  the "default track" flag.
* MKVToolNix GUI: multiplexer, header editor: added menu entries & keyboard
  shortcuts for setting the language of the currently selected tracks to one
  from a configurable list of languages. The shortcuts used are `Ctrl+Alt+A,
  1` through `Ctrl+Alt+A, 0` for the first ten entries of that list (that's
  `Ctrl` and `Alt` with `A` simultaneously followed by a digit without any
  other key pressed).
* MKVToolNix GUI: chapter editor: if the user enters commas in start or end
  timestamps they will automatically be changed to points as the decimal
  separator, allowing for easier copy & paste from other
  programs/sources.
* MKVToolNix: header editor: the selected track or attached file can now be
  moved up & down with the keyboard shortcuts `Ctrl+Up` & `Ctrl+Down`
  respectively.

Bug fixes

* mkvmerge: Matroska reader: DVB subtitle tracks with a codec private data
  size of more than five bytes are accepted now, too.

mkvtoolnix: updated to 64.0.0

Version 64.0.0 "Willows" 2021-12-27

New features and enhancements

* MKVToolNix GUI: language dialog: when the user switches between the two edit
  modes, the mode's corresponding first control is automatically focussed.

Bug fixes

* all: language lists: the entries for "Ancient Greek (to 1453)" and "Modern
  Greek (1453-)" have been renamed to "Greek (ancient, -1453)" and "Greek
  (modern, 1453-)" respectively in order to be easier to find.
* mkvmerge: VobSub reader: files containing `id: --` lines to indicate that
  the track language isn't known were rejected by `mkvmerge`. Now they're
  accepted, and `und` (undetermined) is used as the language.
* MKVToolNix GUI: chapter editor: the "Save to Matroska or WebM file" function
  was using the wrong standard file dialog (the "open file" one instead of
  "save"), leading to confusing button names.
* MKVToolNix GUI: high DPI scaling: fixed the icons in the tool selector
  having the wrong size for scaling factors other than 100% or 200%.

Build system changes

* The bundled `fmt` library was updated to v8.0.1.
* The bundled `nlohmann-json` library was updated to v3.9.1.
* The bundled `pugixml` library was updated to v1.11 revision 6a76cac.
* The bundled `utf8-cpp` library was updated to v3.2 revision b85efd6.

mkvtoolnix: updated to 63.0.0

Version 63.0.0 "Everything" 2021-11-14

New features and enhancements

* mkvmerge: AC-3 parser: E-AC-3 with BSID values > 10 and ≤ 15 are recognized
  now, too.
* mkvmerge: when using language codes for track selection (e.g. `-a und,en`)
  all tracks that do not have a language property (due to their container not
  providing one, e.g. AVIs) will be treated as if they did have one set to
  `und` ("undetermined") as that is the language the track will have in the
  Matroska file anyway. Before this change it wasn't possible to match such
  tracks via language codes.
* MKVToolNix GUI: only on Windows: when compiled with Qt ≥ 5.14 and < 6 (which
  is the case for the officially provided binaries) fractional screen scaling
  will be enabled. This means that the GUI will be scaled appropriately if
  Windows is set to 125%, 150% or 175% instead of being too small or too
  large.
* MKVToolNix GUI: the spinner in the bottom right corner will now be hidden
  when no jobs are currently running.
* MKVToolNix GUI: header editor: a new column has been added to the tree view
  showing the status of the "track enabled" flag. The information is also
  shown on the track overview page on the right.
* MKVToolNix GUI: header editor: users can now reorder tracks by dragging &
  dropping.

Bug fixes

* mkvmerge: AVI reader: fixed reading AVI files that contain `vprp` video
  properties header chunks; reading aborted too early.

multimedia: Replace RMD160 checksums with BLAKE2s checksums

All checksums have been double-checked against existing RMD160 and
SHA512 hashes

The following distfiles could not be fetched (for legal reasons?):

./multimedia/adobe-flash-player/distinfo adobe-flash-player-32.0.0.465/flash_player_npapi_linux.i386.tar.gz
./multimedia/adobe-flash-player/distinfo adobe-flash-player-32.0.0.465/flash_player_npapi_linux.x86_64.tar.gz
./multimedia/libdvdcss/distinfo libdvdcss-1.4.3.tar.bz2

mkvtoolnix: updated to 62.0.0

Version 62.0.0 "Apollo" 2021-10-10

New features and enhancements

* all: IETF BCP 47/TFC 5646 language tags: all ISO 639 languages are now
  available, even the ones that aren't of types "Constructed", "Living" or
  "Special".
* mkvmerge, mkvpropedit: chapters: both programs will now write elements set
  to their default value, too (e.g. the legacy language element if it's set to
  `eng`). This is done to be more consistent with how MKVToolNix GUI writes
  chapters.
* MKVToolNix GUI: multiplexer: when adding new files as attachments the GUI
  checks if there are other attachments with the same name. If so, the GUI
  would ask whether to skip the affected files or add them anyway. There's now
  an option in the preferences to always skip such files, and it's enabled by
  default.
* MKVToolNix GUI: chapter editor: removed the support for explicitly setting
  the legacy country elements. Instead the legacy country elements are derived
  from the region parts of the IETF BCP 47 languages.

Bug fixes

* mkvmerge: fixed a crash when splitting by chapters is enabled but there are
  no chapters at all.
* mkvmerge: the error message when trying to split by a chapter number that
  doesn't exist contained the wrong number of chapters that actually do
  exist.
* mkvmerge: AVC ES parser: fixed mkvmerge aborting due to uncaught exception
  when encountering bad SPS data.
* mkvmerge: AVC/H.264 parser: re-added the hack `--engage
  all_i_slices_are_key_frames` which was accidentally removed in release v61.
* mkvmerge: AVI reader: fixed a crash trying to allocate too big of a memory
  chunk due to an integer overflows in check conditions.
* mkvmerge: HEVC ES parser: fixed another issue with frame type
  recognition. Certain frames were marked as B frames/discardable on the
  container level even though they could be reference pictures. Now only SLNR
  pictures (sub-layer non-reference) are marked that way.
* mkvmerge: HEVC ES reader: improved file content detection for HEVC ES files
  with wrong file name extensions (e.g. `.mkv`), which fixes them being
  mis-detected as something else, e.g. DTS.
* mkvmerge: HEVC ES parser: "end of sequence" NALUs are kept now, and no
  superfluous flushing will be done when one is found. This prevents splitting
  NALUs into two different Matroska blocks when they should really be part of
  a single one, also causing problems with erroneous timestamps. Mostly
  affects DoVi NALUs.
* mkvmerge: Matroska reader, TrueHD: mkvmerge will now probe much more TrueHD
  frames trying to find the first sync frame. This fixes track detection in
  situations when a TrueHD doesn't start with a sync frame, e.g. when the
  source file's the result of splitting between sync frames.
* mkvmerge, MKVToolNix GUI's chapter editor: IETF BCP 47/RFC 5646 language
  tags: when reading chapters from MPLS playlist files, the `ChapLanguageIETF`
  element will now be set to the configured default chapter language, not just
  the legacy `ChapterLanguage` element.
* mkvmerge, mkvpropedit, MKVToolNix GUI's chapter editor: IETF BCP 47 elements
  will now always be created before writing chapters unless IETF BCP 47
  elements are disabled.
* mkvmerge, mkvpropedit, MKVToolNix GUI's chapter editor: when a chapter
  display element contains legacy language & country elements but no IETF BCP
  47 elements and IETF BCP 47 elements aren't disabled, the IETF BCP 47
  elements created will contain the region from the legacy element.
* mkvmerge, mkvpropedit, MKVToolNix GUI's chapter editor: Legacy country
  elements are now created when IETF BCP 47 elements are present & contain a
  region code allowed in legacy country elements.

Build system changes

* The `tools` sub-directory is now always built. The corresponding `configure`
  option `--with-tools` has been removed. The `install` target still doesn't
  install them, though.

multimedia: Remove SHA1 hashes for distfiles

mkvtoolnix: updated to 61.0.0

Version 61.0.0 "So" 2021-08-30

New features and enhancements

* all: IETF BCP 47/RFC 5646 language tags: implemented support for officially
  registered IANA language tag extensions.
* mkvmerge: track selection: when using language tags for selecting which
  tracks to keep, mkvmerge will now use component-based language tag matching
  instead of comparing them verbatim. This means that only those components
  (language, region etc.) the user specified will be required to exist and be
  equal. For example, if a file contains three subtitle tracks with languages
  `es` (generic Spanish), `es-MX` (Spanish as spoken in Mexico) and `es-ES`
  (Spanish as spoken in Spain), the user can use `--stracks es` to match all
  three tracks or be more specific with e.g. `--stracks es-MX` which would
  only match one track. Similarly inverting the selection with e.g. `--stracks
  !es` would get rid of all three tracks, not just the one for the generic
  Spanish.
* MKVToolNix GUI: multiplexer: deriving track languages from file names: the
  GUI can now detect full BCP 47/RFC 5646 language tags in file names.
* MKVToolNix GUI: multiplexer: deriving track languages from file names: the
  default list of boundary characters now includes `-`.
* MKVToolNix GUI: multiplexer: the GUI now defaults to the "lower" process
  priority setting for new installations in order to leave more room for other
  applications, especially interactive ones. Up to and including v59 the
  default was the "normal" process priority. v60 changed that to "lowest",
  which turned out to be much slower on Windows for no real gain over
  "lower". The setting will be auto-corrected by the GUI if the settings file
  were saved last with a version between v60.0.0.0 & v60.0.0.17 & "lowest" &
  it is still set to "lowest".
* HEVC dumper development tool: the tool has been renamed to `xvc_dump` and
  extended to be able to dump AVC/H.264 bitstreams, too. It now also detects
  the type of bitstream framing (ISO 14496-15 vs. ITU-T H.264/H.265 Annex B).

Bug fixes

* all: IETF BCP 47/RFC 5646 language tags: fixed a corner case of wrongfully
  allowing scripts/variants not listed in any of the entries in the prefix
  list when the prefix list contains prefixes restricting scripts/variants and
  a prefix solely with the language at the same time (example: the variant
  `ekavsk` with its prefixes `sr`, `sr-Cyrl` and `sr-Latn` where
  e.g. `sr-ekavsk` and `sr-Cyrl-ekavsk` should be allowed but not
  `sr-Bali-ekavsk`).
* mkvmerge: HEVC/H.265: the frame type of B frames was often wrongfully
  signalled as P frames instead, both with `BlockGroup` (missing second
  references) and `SimpleBlock` ("discardable" flag not set) elements.
* mkvmerge: SSA/ASS packetizer: the frame numbers will now be re-calculated
  when appending SSA/ASS tracks so that frame numbers of appended tracks are
  always strictly higher than frame numbers of the track they're appended to.
* mkvmerge, MKVToolNix GUI's chapter editor: BCP 47/RFC 5646 language tags:
  when BCP 47 language tags are used with a language code that isn't part of
  ISO 639-2, the programs will now write a legacy language element set to
  `und` ("undetermined") instead of not writing such an element at all or
  writing one with an invalid code.
* mkvmerge, MKVToolNix GUI's chapter editor: BCP 47/RFC 5646 language tags:
  the programs will ensure that the legacy and IETF language elements written
  will be unique within the scope of the same "chapter display" element.
* mkvinfo, MKVToolNix GUI's info tool: in summary mode the frame type was
  reported wrong for `BlockGroup` elements in which the `ReferenceBlock`
  elements were located behind the `Block` element.

Build system changes

* all: `std::codecvt_utf8` is now used instead of Boost's
  `utf8_codecvt_facet`. The bundled copy the latter in `lib/boost` has
  therefore been removed.

mkvtoolnix: updated to 60.0.0

Version 60.0.0 "Are We Copies?" 2021-07-31

New features and enhancements

* all: IETF BCP 47/RFC 5646 language tags: added support for language families
  from ISO 639-5 that aren't part of 639-2.
* all: IETF BCP 47/RFC 5646 language tags: implemented support for Alpha 2
  country codes of the "user-defined" category: `AA`, `QM`–`QZ`, `XA`–`XZ` and
  `ZZ`.
* all: IETF BCP 47/RFC 5646 language tags: updated the various lists of valid
  subtags from the official specs.
* MKVToolNix GUI: multiplexer: pressing the keyboard shortcut for the track's
  "Language" label (Alt+L for English) will now open the language dialog.
* MKVToolNix GUI: multiplexer: added an option in the preferences for turning
  off the colored boxes indicating which file each track belongs to.

Bug fixes

* all: IETF BCP 47/RFC 5646 language tags: fixed validating extended language
  & variant subtags against their allowed prefixes (e.g. a valid tag with a
  country code as in `de-CH-1996` is recognized as valid while two generally
  known variants that aren't allowed together as in `de-1901-1996` is
  recognized as invalid).
* all: IETF BCP 47/RFC 5646 language tags: when looking up a language for a
  two- or three-letter code, the programs will no longer compare that code
  with language names as that was unintended, ambiguous (e.g. the code "Ga"
  could be interpreted as the 639-2 alpha-2 code for "Irish" or as the name of
  the language called "Ga") and only worked with languages whose name was at
  most three letters long.
* mkvmerge: HEVC/H.265: appending Matroska files with HEVC tracks might lead
  to the loss of the first couple of frames from each of the second and all
  following files.
* mkvmerge, mkvextract: HEVC/H.265 parser: fixed the programs aborting when
  parsing VPS or SPS NALUs with invalid content due to unhandled
  exceptions.
* MKVToolNix GUI: multiplexer: when the option "use legacy MIME types for font
  attachments" is enabled, the GUI will now use `application/x-truetype-font`
  for font collection files.
* MKVToolNix GUI: multiplexer: fixed escaping the `mkvmerge` argument in the
  "Show command-line options" dialog for the "Windows (cmd.exe)" mode.
* MKVToolNix GUI: multiplexer: when adding multiple files at once, the GUI
  will sort file names with numbers the way a human would expect it to. For
  example, `1.mp4`, `9.aac`, `10.srt`, `11.srt` are now sorted exactly that
  order instead of `1.mp4`, `10.srt`, `11.srt`, `9.aac`.
* MKVToolNix GUI: header editor: the header editor will now honor the "use
  legacy MIME types when adding font attachments" setting when adding new
  attachments.

mkvtoolnix: updated to 59.0.0

Version 59.0.0 "Shining Star" 2021-07-10

New features and enhancements

* mkvmerge: WebVTT parser: the parser now follows the specs' rules for parsing
  timestamps more closely by being more lenient: it allows arbitrary number of
  spaces & tabs at the start of the line & around the arrow; it allows any
  number of digits for the hours.
* MKVToolNix GUI: multiplexer: when adding a Blu-ray playlist without scanning
  for other playlists the GUI will now look for disc library information & let
  the user select which one to use if there's more than one entry.
* MKVToolNix GUI: multiplexer: added an option for sorting files & tracks by
  track types when adding them to multiplex settings. The order is: video
  first followed by audio, subtitles and other types. Files & tracks can still
  be reordered manually later. The option is enabled by default & can be found
  in the preferences → "Multiplexer" page → "Adding files" section.
* MKVToolNix GUI: multiplexer: added an option for recognizing file name
  sequences such as `movie.001.mp4`, `movie.002.mp4`, `movie.003.mp4` when
  adding multiple files at once. If a sequence is detected, the only first
  file will be added while the second and following file names will be
  appended to the first one. The option is enabled by default & can be found
  in the preferences → "Multiplexer" page → "Adding files" section.
* MKVToolNix GUI: multiplexer: added small colored boxes for each file & track
  in order to indicate from which file each track is read. The colors used can
  be configured in the preferences → "Multiplexer" page → "File & track
  colors" section.

Bug fixes

* build system: fixed compilation with fmt v8.
* mkvmerge: SRT subtitle reader: characters that aren't valid according to the
  assumed encoding of the file will now be replaced by the Unicode
  "Replacement Character" U+FFFD instead of keeping the invalid characters,
  potentially violating the Matroska specs.
* mkvmerge: WebVTT parser: the parser now accepts timestamps with hours
  larger than 99.
* mkvextract: TTA extraction, only on Windows: fixed removing the temporary
  file created during extraction.
* mkvmerge, mkvpropedit, MKVToolNix GUI's multiplexer & header editor: MIME
  type detection is now done using Qt instead of the `magic` library. The main
  impact is the MIME types of TrueType & OpenType fonts are now detected
  correctly.
* mkvmerge, mkvinfo, MKVToolNix GUI's info tool: only on Windows: displaying
  dates before 1970-01-01 00:00:00 UTC or after 2038-01-19 03:14:08 UTC was
  broken. Note that the header editor was not affected.
* MKVToolNix GUI: only on 64-bit Windows: under certain conditions, the 64-bit
  Windows binaries crashed when opening dialog windows. Even though the
  underlying bug hasn't been identified, the investigation showed that
  building it with newer versions than 10.2.0 of the mingw/gcc cross-compiler
  enabled the crashes, while binaries built with 10.2.0 were fine. This
  affected v57 and v58 which were built with gcc versions 10.3.0 and 11.1.0
  respectively. For the time being I've switched back to building Windows
  binaries with gcc 10.2.0.
* MKVToolNix GUI: multiplexer: when adding files to the multiplexer by running
  the GUI's executable with file names as command line arguments, the source
  directory will be remembered as the "last open directory" again, causing
  subsequent uses of the "open file" dialog to start in the same directory.
* MKVToolNix GUI: multiplexer: the "default track flag" column in the track
  list was missing its icons. Additionally it contained text even for things
  that aren't regular tracks and therefore do not actually have that flag
  (e.g. chapters or tags).
* MKVToolNix GUI: multiplexer: the default for the dialog asking the user what
  to do with dragged & dropped files if they've never seen the dialog is back
  to adding the files to the current multiplex settings instead of "add as
  additional parts" which was an unintentional default.
* MKVToolNix GUI: multiplexer: the "show command line" dialog will now always
  use backward slashes for the "Windows (cmd.exe)" mode and forward slashes
  for the "Linux/Unix shells" mode, regardless of the operating system it's
  currently running on.

Build system changes

* The Qt library is now required for building all applications, even the
  command-line ones, as they use Qt's MIME type detection capabilities. In
  turn this means that you cannot disable the Qt usage anymore; either Qt5 or
  Qt 6 is required.

  You can still chose not to build MKVToolNix GUI, though. A new option has
  been added to `configure` for this purpose: `--disable-gui`.
* The `gmp` library is now required.
* The `magic` library is not used anymore.
* The `PCRE2` & `JPCRE2` libraries are not used anymore. The bundled version
  of `JPCRE2` was removed.
* Boost's "rational" library is not used anymore.
* `configure`: the option `--enable-appimage` has been removed. The location
  of the relevant directories within an AppImage is now detected
  automatically.
* The bundled `fmt` library was updated to v8.0.0.

mkvtoolnix: updated to 58.0.0

Version 58.0.0 "Supper's Ready" 2021-06-13

New features and enhancements

* mkvmerge, MKVToolNix GUI's multiplexer: the handling of the "default track"
  flag has been changed to match the recent changes to the Matroska
  specifications. The new semantics are that if it is set, it is supposed to
  signal to the player that this track is eligible for being played by
  default, potentially taking other factors such as user preferences regarding
  languages into account.

  This implies that more than one track of each type can have this flag
  set. For example, a Blu-ray disc with three audio tracks might have
  the main audio in both English and Japanese, whereas the third audio
  track contains the director's comments. In such a case the first two
  tracks should have the "default track" flag set, the third one
  shouldn't.

  Earlier `mkvmerge` was enforcing that only one track of each type could have
  the flag set. This restriction has been removed, both in `mkvmerge` and in
  the GUI's multiplexer.

  `mkvpropedit` and the GUI's header editor are unaffected as they've always
  allowed to set the flag on as many tracks as the user wanted.
* mkvmerge: AVC/H.264 & HEVC/H.265 identification: added the stream's pixel
  dimensions (AVC only; were present for HEVC already) & default
  duration.
* mkvmerge, mkvextract: HEVC/H.265: added support for reading single-layer
  Dolby Vision from Annex B type bitstreams (elementary streams, MPEG
  transport streams). Patch by quietvoid.
* mkvinfo: the option `-X`/`--full-hexdump` now affects all binary elements,
  not just the frame data in `SimpleBlock` and `BlockGroup` elements.
* MKVToolNix GUI: multiplexer: the "delay" and "sync" options can now be used
  for chapters in source files, too.
* MKVToolNix GUI: when moving list entries up & down with the optional buttons
  or the keyboard shortcuts (instead of using drag & drop), the GUI ensures
  that the top-most selected entry remains visible after the move.
* MKVToolNix GUI: added an option in the preference to use legacy MIME types
  for font attachments instead of the current standard ones
  (e.g. 'application/x-truetype-font' instead of 'font/sfnt' and 'font/ttf').

Bug fixes

* build system: fixed filtering out optimization options when compiling the
  file `iso639_language_list.cpp` (before only numeric optimization levels
  were filtered out and only if it wasn't the last option in the list of
  flags).
* build system: when libmagic was detected via `pkg-config`, MKVToolNix was
  actually compiled without support for libmagic due to a preprocessor symbol
  not being defined.
* mkvmerge: MP4 reader: fixed an issue with timestamps overflowing when the
  file's or the track's time scale is large.
* mkvmerge, mkvextract: fixed key frame handling for `BlockGroup` elements
  with a forward reference but no backward references. Patches by Tom Yan.
* mkvmerge, mkvpropedit, MKVToolNix GUI's chapter editor: the programs will no
  longer omit writing mandatory elements set to their default value if other
  elements of the same type are present in the same master. This affects
  mostly the "chapter language" element which may occur multiple times within
  the same "chapter display" master. If it does occur multiple times and one
  of them is set to "English" (which is that element's default value), that
  element will now be written, too.
* mkvmerge, mkvpropedit, MKVToolNix GUI's chapter editor: when parsing chapter
  files IETF & legacy language elements as well as legacy country elements
  will now be properly generated depending on which exist already, especially
  when there's more than one language and/or country element in a "chapter
  display" element.
* mkvmerge, mkvpropedit, MKVToolNix GUI's chapter editor: fixed reading
  OGM-style chapter files with timestamps that don't have exactly three
  decimal places. Any number of decimal places between one and nine is now
  supported for nanosecond precision.
* MKVToolNix GUI: chapter editor: added/fixed support for "chapter display"
  elements with multiple languages or countries.

Build system changes

* Qt 6: added support for building with Qt 6. `configure` will look for Qt 6
  first and only continue looking for Qt 5 if Qt 6 isn't found or disabled via
  `--disable-qt6`.

  Qt 6 detection works by first looking for the `qmake6` binary. Its location
  can be specified with the `--with-qmake6=…` option.

  All other Qt 6 related facts (such as compiler & linker flags or the
  position of the other required tools such as `lconvert`, `moc`, `rcc` and
  `uic`) will be derived from the output generated by `qmake6`.

  Note that at this point Qt 6 is not yet supported for the cross-compilation
  build to Windows, nor is a static Qt 6 build supported yet.

  Note that the command line options `--enable-static-qt`,
  `--with-qt-pkg-config-modules` and `--without-qt-pkg-config` only apply to
  the Qt 5 and have no effect on Qt 6.
* Qt 5: the options for specifying the position of the tools (`--with-moc=…`,
  `--with-rcc=…` and `--with-uic=…`) have been removed. Their position will
  now be derived from the output generated by `qmake`.
* `configure`: completely disabling the GUI now requires passing both
  `--disable-qt6` and `--disable-qt` options.
* Boost's multi-precision library is now required.
* Boost v1.66 or newer is now required.

Other changes

* The Windows build is now using an updated version of the
  `file`/`magic` library for MIME type detection of attachments. This
  affects fonts whose MIME types will now be the current standard MIME
  types (e.g. `font/sfnt` or `font/ttf` for TrueType fonts). As this
  might pose problematic with older players that only support the
  legacy MIME type (e.g. `application/x-truetype-font`), a new option
  was added in the GUI's preferences to use the legacy MIME types
  instead of the current standard ones. This is off by default.
  Builds for other operating systems have already been using newer
  versions of the `file`/`magic` library for a long time.

mkvtoolnix: updated to 57.0.0

Version 57.0.0 "Till The End" 2021-05-22

New features and enhancements

* mkvmerge: MP4 reader: added support for reading Dolby Vision from MP4 files
  (FourCCs `dvh1` and `dvhe`; configuration records `dvcC`, `dvvC` and `hvcE`
  will be converted into block addition mappings).
* mkvmerge: SRT subtitles: mkvmerge now accepts empty text files with the
  extension `.srt` as SRT subtitle files, enabling the creation of empty SRT
  tracks.
* mkvmerge, mkvextract: HEVC/H.265: access unit delimiter NALUs will no longer
  be discarded, neither during muxing nor during extraction.
* MKVToolNix GUI: preferences: switched the order & wording of controls in the
  "enabling items" panel to make it clearer that certain controls define
  exceptions.

Bug fixes

* mkvmerge: HEVC/H.265 parser: several NALU types, notably the Dolby
  Vision-specific NALUs ("unspecified 62" and "unspecified 63") and suffix SEI
  NALUs, are now stored with the frame they belong to instead of with the next
  frame.
* mkvmerge: HEVC/H.265 packetizer: fixed setting the track's default duration
  when reading HEVC/H.265 from Matroska files that don't have a default
  duration set.
* mkvmerge: HEVC/H.265 packetizer: fixed the calculation of the duration of
  frames so that `SimpleBlock` elements can be used again instead of
  `BlockGroups` with `BlockDuration` elements.
* mkvmerge, mkvextract: HEVC/H.265 parser: fixed issues with ordering &
  duplication of certain NALUs (parameter set & prefix SEI NALUs).
* MKVToolNix GUI: multiplexer: when dragging & dropping files to the
  multiplexer, the source directory will be remembered as the "last open
  directory" again, causing subsequent uses of the "open file" dialog to start
  in the same directory.
* mkvinfo: fixed the position of frames in block groups containing "block
  duration" elements in summary mode (e.g. for subtitle tracks).

Build system changes

* `configure` will now try to detect `libmagic` via `pkg-config` and fall back
  to including & linking directly if it cannot be found via `pkg-config`.

mkvtoolnix: updated to 56.1.0

Version 56.1.0 "My Friend" 2021-04-09

New features and enhancements

* mkvmerge: AAC: added support for LOAS/LATM files with channel configuration
  indexes 9–21 (e.g. channel count 22.2 for index 13) according to Rec. ITU-R
  BS.1196-7 & ISO/IEC 23008-3:2019.

Bug fixes

* mkvmerge: HEVC/H.265 parser: fixed invalid memory access that could happen
  when reading certain types of HEVC data (e.g. with changing parameter sets
  mid-stream) from certain containers (e.g. Matroska). This bug was introduced
  in release 56.0.0.
* mkvextract: AAC: mkvextract will now abort with an useful error message when
  the user tries to extract a track whose 'audio-specific config' element in
  `CodecPrivate` signals a number of channels of 7 or greater than 8 as that
  isn't supported by the ADTS format.

Build system changes

* configure: the `--enable-ubsan` option hasn't actually enabled anything
  since release 39.0.0.

mkvtoolnix: updated to 56.0.0

Version 56.0.0 "Strasbourg / St. Denis" 2021-04-05

New features and enhancements

* mkvmerge, mkvpropedit: tags: the programs will no longer write tag elements
  that are mandatory and set to their default value (e.g. "tag language" set
  to `und` = undetermined).
* mkvmerge, mkvpropedit, MKVToolNix GUI chapter editor: chapters: the programs
  will no longer write chapter elements that are mandatory and set to their
  default value (e.g. "chapter language" set to `eng` = English or "Chapter
  flag enabled" = 1).
* mkvextract: chapters: mkvextract will no longer add a `ChapterLanguage`
  element set to `eng` to the generated XML content if the source file doesn't
  contain such an element.
* MKVToolNix GUI: multiplexer: when using the "tab widget below the files &
  tracks" layout option for the track properties the elements in the "general
  options" tab will use six rows à four columns instead of twelve rows à two
  columns, greatly reducing the required height.

Bug fixes

* mkvmerge: AAC reader: fixed mkvmerge aborting to read AAC files bigger than
  2 GB with a message about not being able to allocate memory.
* mkvmerge: chapters: `ChapLanguageIETF` elements were still created when the
  option `--disable-language-ietf` was given after an option leading to the
  creation of chapters. Now the position doesn't matter anymore.
* mkvmerge: chapters: when the option `--disable-language-ietf` is used,
  `ChapLanguageIETF` elements won't be written even when sources are read
  (Matroska files or XML chapters files) that do contain those elements.
* mkvmerge: tags: when the option `--disable-language-ietf` is used,
  `TagLanguageIETF` elements won't be written.
* mkvmerge: tags: mkvmerge will no longer write language elements for the
  track statistics tags it creates, making the effective language
  "undetermined" due to `und` being the default value for the legacy tag
  language element.
* mkvmerge: tags: the XML tag parser will now validate all `<Simple>` children
  of `<Tag>` elements, not just the first for each `<Tag>`.
* mkvmerge: tags: the XML tag parser now uses the spec-compliant `und`
  ("undetermined") as the default language for `<Simple>` tags instead of
  `eng`.
* mkvmerge, mkvpropedit: tags: mkvmerge will no longer set the "target type"
  for track statistics tags (earlier it used `MOVIE`). The "target type value"
  will still be set to `50`.
* mkvmerge, mkvextract: HEVC/H.265: both programs will now normalize the
  placement of VPS, SPS and PPS NALUs. Each key frame is prefixed with exactly
  one copy of the currently active parameter sets. This fixes certain classes
  of bugs related to splitting/appending.
* mkvinfo: when compiled with newer versions of the `fmt` library, certain
  numbers were not output correctly (e.g. a track's audio sampling frequency
  of 48000 might be output as 48).
* MKVToolNix GUI: multiplexer: deriving the track language from the file name
  will match languages case insensitively again (like versions prior to
  v55).
* MKVToolNix GUI: multiplexer: under certain circumstances keyboard shortcuts
  such as `Ctrl+W` for closing the active tab or `Ctrl+R` for starting to
  multiplex ceased to work until the user did certain other things (such as
  switching to a different tool & back to the multiplexer or opening the
  multiplexer menu). This started with v54.
* MKVToolNix GUI: chapter editor: the editor will no longer create empty
  `ChapterCountry` elements when adding a chapter name with no default country
  selected in the preferences.

Build system changes

* The bundled `fmt` library was updated to v7.1.3.

mkvtoolnix: updated to 55.0.0

Version 55.0.0 "Waiting For Space"

Bug fixes

* all programs, only on Windows: fixed checking existence of & creating
  directories with UNC paths such as `\\server\share\folder\file.mkv`.
* all programs, only on Windows: implemented several workarounds for bugs in
  `std::filesystem` wrt. UNC paths. The effect of those bugs was that Blu-rays
  and DVDs couldn't be added from UNC paths.
* mkvmerge, only on Windows: fixed non-ASCII characters getting mangled in the
  destination file name when splitting is active.
* MKVToolNix GUI, only on Windows: fixed the GUI hanging when trying to browse
  for files on drives that don't actually exist.
* MKVToolNix GUI, only on Windows: the GUI did not remember UNC paths as the
  "most recently used source directory" properly.
* MKVToolNix GUI: only on Windows: when dragging & dropping files from other
  applications to MKVToolNix GUI the GUI will force the drop action to be a
  copy action, no matter which keys were pressed by the users. This prevents
  Windows Explorer from deleting the dragged file when the user presses shift
  while dropping the file onto MKVToolNix GUI.
* MKVToolNix GUI, only on Windows: when using the file dialog for selecting a
  file name to save to (e.g. when browsing for the destination file name in
  the multiplexer or saving an attachment in the header editor) non-ASCII
  characters in the default file name were mangled.
* MKVToolNix GUI: multiplexer: the user can now configure what to do when
  using the "Add source files" button independently of the setting for what
  happens when files are dragged & dropped onto the GUI. The same options are
  available, but they're distinct settings, allowing for different use
  cases.
* MKVToolNix GUI: multiplexer: deriving the track language from file names
  doesn't use one big regular expression of all enabled languages
  anymore. Instead, the file name is split into parts on a list of characters
  (such as `.` or `(` and `)`; configurable in the preferences). This prevents
  the regular expression becoming too big for the regular expression library
  to handle when many languages are enabled.
* MKVToolNix GUI: preferences: the language lists for "deriving track
  languages" and "enabling items by language" always included all the ISO
  639-3 languages, even if those weren't enabled in the "often-used languages"
  pane.

Other changes

* mkvmerge, MKVToolNix GUI multiplexer: the functionality for changing the
  length of the NALU "size" field for AVC/H.264 and HEVC/H.265 tracks has been
  removed. The corresponding command-line option will continue to be
  recognized by mkvmerge as not to break existing third-party applications,
  but it won't actually do anything.

mkvtoolnix: updated to 54.0.0

Version 54.0.0 "F Maj Pixie"

New features and enhancements

* mkvmerge: added support for using ISO 639-3 language codes in IETF BF47
  language tags.
* mkvmerge: AC-3 parser: added support for byte-swapped AC-3 data.
* mkvmerge: Matroska reader: for audio tracks that have the bit depth track
  header set mkvmerge will now keep that header even for codecs that don't
  require it for decoding.
* mkvmerge: MPEG transport stream reader, PCM audio tracks: mkvmerge will now
  re-order the channels for 5.1, 7.0 and 7.1 channel tracks from the Blu-ray
  layout to the WAVEFORMATEXTENSIBLE layout expected in Matroska.
* mkvmerge, mkvinfo, mkvpropedit, MKVToolNix GUI: added support for the
  following new track header elements: "hearing impaired" flag, "visual
  impaired" flag, "text descriptions" flag, "original" flag, "commentary"
  flag.
* MKVToolNix GUI: added support for using ISO 639-3 language codes in IETF
  BF47 language tags. As there are several thousand of them, they're
  deactivated by default and must be activated in the preferences ("GUI" →
  "Often used selections" → "Languages").
* MKVToolNix GUI: multiplexer: when adding Blu-rays the user can select
  multiple playlists to add simultaneously in the "select playlist to add"
  dialog.
* MKVToolNix GUI: multiplexer: the file name extensions "eb3" and "ec3" were
  added for Dolby Digital Plus & "mpl" for Dolby TrueHD in the file
  dialogs.
* MKVToolNix GUI: multiplexer: when adding multiple files the dialog asking
  the user what to do with them has gained a new checkbox. If enabled, all
  files containing at least one video track will always be placed in newly
  created multiplex setting.
* MKVToolNix GUI: multiplexer: added a menu entry in the "Multiplexer" for
  adding all files that are currently in the clipboard.

Bug fixes

* all: Windows: fixed compatibility with gettext 0.21 and newer on mingw.
* all: Windows: fixed several of the programs having problems with certain
  Unicode characters (primarily emojis) in file names (e.g. mkvextract
  wrongfully complaining about an "invalid mode" or the GUI not being able to
  find parts of Blu-ray file structures).
* mkvextract: AAC: fixed wrong channel mask field in the ADTS headers for 7.1
  channel layouts.
* mkvextract: h.265/HEVC extraction: if the first frame starts with the
  parameter sets (SPS, PPS & VPS), the ones from CodecPrivate aren't written
  and the ones from the first frame are kept.
* mkvmerge: fixed the calculation of chapter timestamps read from NTSC
  DVDs.
* MKVToolNix GUI: IETF BCP 47 language widget: the language combo box will now
  always contain the language code the user enters in the free-form field,
  even if it isn't in the list of often-used languages the user configured in
  the preferences.
* MKVToolNix GUI: multiplexer: when browsing for the destination file name the
  default directory is now chosen according to the preferences regarding how
  the destination file name should be formed. For example, if the policy is
  set to "fixed output directory" then that output directory will be the one
  initially set when the directory selection dialog is opened.
* MKVToolNix GUI: multiplexer: fixed the removal of appended source files if
  the "delete source files" end-of-job action is enabled.
* MKVToolNix GUI: chapter editor: when importing chapters from DVDs the IETF
  BCP 47 language elements will be set, too, not just the legacy language
  elements.

Build system changes

* libEBML v1.4.2 and libMatroska v1.6.3 are now required. The optional,
  bundled copies of both libraries have been updated to those versions. This
  bump in requirements fixes several heap overflow bugs in libEBML.
* MKVToolNix is now using the C++17 library feature "file system library"
  instead of Boost's "file system" and "system" libraries. For the GNU
  Compiler Collection (gcc) libstdc++ this means v8 or newer is required; for
  clang's libc++ it means v7 or newer. For macOS this means that provided disk
  image will only run on 10.15 "Catalina" or newer.

mkvtoolnix: updated to 53.0.0

Version 53.0.0 "Fool's Gold"

New features and enhancements

* mkvmerge: AVI reader: added support for reading the video aspect ratio from
  the video properties header (`vprp` chunk) if present and setting the
  display dimensions accordingly.
* mkvmerge: MP4 reader: for h.264/AVC tracks that don't have an
  `AVCConfigurationBox` (`avcC` atom) in their sample description (`stsd`)
  atom or whose `avcC` atom contains no content `mkvmerge` will now re-derive
  the `AVCConfigurationBox` from the bitstream.
* mkvextract: mkvextract will now check if any of the destination file names
  is the same as the source file name and abort with an error if that's the
  case.
* MKVToolNix GUI: when querying the user for a file name for saving things
  (e.g. multiplexer settings or an attachment in the header editor), the
  automatically suggested file name will now be based on the
  situation-specific file names (e.g. the destination file name for
  multiplexer settings or the attachment's name when saving an attachment in
  the header editor) instead of the directory's name.
* MKVToolNix GUI: multiplexer: when deriving track languages from file names
  the GUI will now select the right-most match instead of the left-most
  one. For example, "La.vie.en.rose.(fr).srt" will now be detected as French
  (fr) instead of English (en).
* MKVToolNix GUI: preferences: the items in the "pre-defined …" lists can now
  be renamed by double-clicking with the mouse or pressing the F2 key.
* Windows installer: the `bluray_dump` command-line utility will be installed
  into the `tools` sub-directory. `bluray_dump` can read & dump certain file
  types used on Blu-rays: `.mpls` playlists, `.clpi` clip information
  databases, `.bdmv` index files, `bdmt_….xml` disc library databases and
  `tnmt_….xml` track & chapter name databases.

Bug fixes

* mkvmerge: stretching chapter timestamps with `--chapter-sync` now works
  correctly with floating point values including fractions of floating point
  numbers (e.g. `12.3/45.67`). The tooltips in the GUI have been adjusted
  accordingly.
* mkvmerge: MPEG 1/2 video handling: the "default duration" header field was
  often half the value it actually should be, resulting in all video frames
  having an explicit block duration with the correct value. This has been
  fixed with a patch by Tom Yan.
* mkvmerge: MPEG 1/2 video handling: the data stored in `Codec private` and
  `Codec state` doesn't contain extensions other than sequence & sequence
  display extensions anymore. Fix by Tom Yan.
* mkvmerge: tag handling: when remuxing a Matroska file with the
  `--no-track-tags`, existing `SOURCE_ID` track tags are now skipped, too.
* MKVToolNix GUI: multiplexer: the drop-down boxes with pre-defined track
  names now follow the order set in the preferences instead of sorting the
  entries alphabetically.

mkvtoolnix: updated to 52.0.0

Version 52.0.0 "Secret For The Mad"

New features and enhancements

* MKVToolNix GUI: job queue: the maximum number of jobs to run concurrently
  can now be increased in the preferences. The default remains
  at 1.
* MKVToolNix GUI: the GUI will now add a context-specific default extension to
  file names selected for saving on platforms that don't add one itself
  (e.g. GNOME). For example, when saving multiplexer settings the extension
  `.mtxcfg` will be added.
* MKVToolNix GUI: added an option to the preferences for the window to stay on
  top of other windows.

Bug fixes

* mkvextract: h.265/HEVC extraction: the code for skipping extraction of
  prefix SEI NALUs in the first frame was skipping two bytes too few,
  resulting in broken processing of all following bytes. Patch by Mike Chen.
* libEBML: the optional, bundled version of libEBML was updated to v1.4.1.

Build system changes

* libEBML v1.4.1 is now required due to a bug in libEBML that caused pointers
  to just-freed memory being returned to the caller under certain invalid data
  constellations, causing use-after-free errors in all of MKVToolNix's
  programs.

mkvtoolnix: updated to 51.0.0

Version 51.0.0 "I Wish" 2020-10-04

New features and enhancements

* mkvmerge, mkvpropedit, MKVToolNix GUI: IETF BCP 47 language tags: added
  missing support for UN M.49 regions for which there are no corresponding ISO
  3166 alpha codes. This enables language tags such as `es-419` = Spanish in
  Latin America and the Caribbean.
* MKVToolNix GUI: IETF BCP 47 language tags: the text in the widget displaying
  the current language & the corresponding edit button is now displayed like a
  link (depending on the theme: different color & underlined), making it
  clearer that not just the edit button can be clicked but the text, too.

Bug fixes

* mkvmerge: AV1 parser: fixed mkvmerge crashing after uncaught exceptions due
  to certain data conditions. Found by fuzzying.
* mkvmerge: AV1 packetizer: the duration of frames wasn't set properly. When
  appending AV1 IVF or OBU files this meant that the last frame of the Nth
  file and the first frame of file N+1 had the same timestamp.
* mkvmerge: DTS reader: fixed handling of buffers with an odd length when
  byte-swapped DTS is detected so that mkvmerge doesn't abort with a failed
  assertion. Found by fuzzying.
* mkvmerge: h.264/AVC and h.265/HEVC elementary stream readers: mkvmerge will
  no longer claim to recognize data that looks like AVC or HEVC but with
  invalid video width/height values as that lead to failed assertions in
  libEBML later. Found by fuzzying.
* mkvmerge: h.265/HEVC parser: fixed mkvmerge aborting after uncaught
  exceptions due to certain data constellations found by fuzzying.
* mkvmerge: IVF reader: fixed mkvmerge crashing with a "division by zero"
  error due to certain data conditions. Found by fuzzying.
* mkvmerge: fixed mkvmerge aborting with a "division by zero" error due to the
  timestamp scaling factor being 0 after handling certain data constellations
  found by fuzzying.
* mkvmerge: track statistics: fixed a "division by zero" error when the
  content's shorter than 1ms. Found by fuzzying.
* mkvmerge, mkvinfo, mkvextract, mkvpropedit: Matroska access class: fixed an
  invalid memory access under certain data conditions. Found by fuzzying.
* MKVToolNix GIU: IETF BCP 47/RFC 5646 language tags: the GUI will no longer
  open the language dialog when clicking on a disabled language display
  widget.
* MKVToolNix GUI: IETF BCP 47 language tags: the "variants" combo-boxes were
  not populated even when the language tag was valid and contained at a
  variant.
* MKVToolNix GUI: IETF BCP 47 language tags: when no language is selected, at
  least one of the other components (extended subtags, region, or variants)
  has something selected and "private use" is not empty, the GUI would claim
  this to be a valid tag, which it isn't.
* MKVToolNix GUI: multiplexer: when the tracks/chapters/tags selection changes
  from "at least one entry selected" to "no entry selected", the input
  controls will be reset to their default state and not just disabled.

Build system changes

* `configure` now checks for the presence of the a system-wide installed copy
  of the JPCRE2 C++ wrapper library for the PCRE2 library and uses that if
  it's new enough (at least v10.32.1). If not, the bundled version will be
  used as a fallback.

mkvtoolnix: updated to 50.0.0

Version 50.0.0 "Awakenings"

New feature: IETF BCP 47 language tags

* I've written up a [nice FAQ
  entry](https://gitlab.com/mbunkus/mkvtoolnix/-/wikis/Languages-in-Matroska-and-MKVToolNix)
  about the switch to using IETF BCP 47 language tags, how they interact with
  legacy language elements, how the programs actually behave and how to
  disable their use if necessary.
* mkvmerge: IETF BCP 47/RFC 5646 language tags: mkvmerge will now accept full
  BCP 47 language tags for all options taking a language. mkvmerge will always
  write "LanguageIETF" track header elements. If the language tag contains a
  valid ISO 639-2 language code it will also set the legacy "Language" track
  header element to the included ISO 639-2 code.
* mkvmerge: IETF BCP 47/RFC 5646 language tags: if present the "LanguageIETF"
  track header element will be reported as the `language_ietf` property in
  JSON identification mode.
* mkvmerge: IETF BCP 47/RFC 5646 language tags in chapters: mkvmerge will now
  write "ChapLanguageIETF" elements when creating chapter atoms, either when
  reading the simple chapter format or when generating chapters due to the
  `--generate-chapters` command line option.
* mkvmerge: IETF BCP 47/RFC 5646 language tags in tags: mkvmerge will now
  write "TagLanguageIETF" elements when creating "simple tag" elements, either
  when reading tag XML files or when generating them.
* mkvmerge: IETF BCP 47/RFC 5646 language tags: added an option
  `--disable-language-ietf` that causes mkvmerge to only write the legacy
  language elements.
* mkvmerge, mkvpropedit, MKVToolNix GUI's chapter editor: IETF BCP 47/RFC 5646
  language tags in chapters: when reading XML chapter files the programs will
  now add "ChapLanguageIETF" elements for atoms that don't contain them. The
  values are derived from existing "ChapterLanguage" elements.
* mkvpropedit: IETF BCP 47/RFC 5646 language tags: setting/deleting the track
  language now acts on both the old language element as well as the
  "LanguageIETF" track header element.
* mkvpropedit: IETF BCP 47/RFC 5646 language tags: added an option
  `--disable-language-ietf` that causes mkvpropedit to apply changes to the
  `language` track header property only to the legacy language track header
  element.
* mkvinfo: IETF BCP 47/RFC 5646 language tags: added support for the
  "LanguageIETF" track header element.
* MKVToolNix GUI: multiplexer: added full support for IETF BCP 47/RFC 5646
  language tags for both track and chapter languages.
* MKVToolNix GUI: chapter: added full support for IETF BCP 47/RFC 5646
  language tags for chapter languages.
* MKVToolNix GUI: header editor: added full support for IETF BCP 47/RFC 5646
  language tags for track header languages. The header editor allows editing
  of the legacy language elements and the IETF BCP 47 language elements
  independent of each other.

Other new features and enhancements

* mkvmerge: the chapter generation mode `when-appending` now also works with
  the splitting modes `parts:` & `parts-frames:` when using the `…,+…` syntax
  for appending other sections of the source file to the same destination
  file.
* MKVToolNix GUI: multiplexer: the file selection dialogs now include the
  extension `.dtsma` for DTS files.
* mkvmerge: MP4 reader: sped up parsing MP4 DASH files with a lot of segments
  (`trun` atoms) quite a bit.
* The PCRE2 regular expression library is now used instead of `std::regex` for
  big performance improvements in all places where regular expressions are
  used for parsing big chunks of text, e.g. in the subtitle parsers.
* all programs: Windows: all programs now support long file names on Windows
  10 release 1604 if they're turned on in the registry.

Bug fixes

* MKVToolNix GUI: preferences: under certain conditions changing the selected
  entry in the page tree on the left did not cause the page shown on the right
  to be updated.
* mkvmerge: splitting text by a fixed string (e.g. `,`) is now done by using
  `std::string.find()` instead of using a regular-expression-based text
  splitting function, greatly improving its performance.
* mkvmerge: mkvmerge will now read-buffer file I/O when probing text file
  formats which increases its speed significantly on Windows.
* mkvmerge: MP4 reader: fixed handling of `tkhd` atoms of version 1.

Build system changes

* The PCRE2 library (the 8-bit variant) is now required.

mkvtoolnix: updated to 49.0.0

Version 49.0.0 "Sick Of Losing Soulmates" 2020-08-02

New features and enhancements

* mkvmerge: added support for copying the new track header elements
  `BlockAddIDName`, `BlockAddIDType`, `BlockAddIDValue` and
  `BlockAddIDExtraData` from Matroska files if they exist.
* mkvinfo: added support for the new track header elements
  `BlockAdditionMapping`, `BlockAddIDName`, BlockAddIDType`, `BlockAddIDValue`
  and `BlockAddIDExtraData`.
* MKVToolNix GUI: multiplexer: the list of recent directories can now be
  edited in the preferences → "Multiplexer" → "Destination file
  name".
* MKVToolNix GUI: preferences: the values in the various "predefined values"
  lists can now be re-ordered freely by dragging & dropping.

Bug fixes

* mkvmerge: Matroska reader: when reading tracks (e.g. a subtitle track) from
  Matroska files with their `default track` flag set to `yes`, and when
  overwriting those via the command line to `no`, `mkvmerge` would not promote
  additional tracks of the same type from other files (e.g. another subtitle
  track from an SRT file).
* mkvmerge: SRT reader: empty lines inside entries were doubled.
* mkvmerge: subtitles: when calculating the rounded duration of each entry the
  error from rounding the corresponding timestamp will be taken into
  account.
* mkvextract: SSA/ASS extraction: mkvextract is no longer inserting empty
  lines before the `Dialogue:` lines.
* mkvextract: USF subtitles: start & end timestamps were too high by a factor
  of 1.000.000.
* MKVToolNix: info tool: when saving to a text file the checkbox "Save as
  default for saving output to text files" did nothing.
* MKVToolNix: info tool: when saving to a text file in "all elements in a
  tree-like structure" mode, the GUI always stopped at the first cluster
  regardless of the setting of the "verbosity" option.
* MKVToolNix GUI: preferences: when tooltips were disabled the dialogs for
  adding new entries to the various "predefined values" lists were missing
  their texts.
* Windows installer: the images are shown again.
* configure: fixed detection of QtDBus.

Build system changes

* libMatroska v1.6.1 is now required. The bundled version has been updated to
  that version.

mkvtoolnix: updated to 48.0.0

Version 48.0.0 "Sick Of Losing Soulmates" 2020-06-27

New features and enhancements

* mkvmerge: AC-3: file identification will report AC-3 tracks encoded in Dolby
  Surround EX as codec "AC-3 Dolby Surround EX".
* MKVToolNix GUI: multiplexer: on new installations the GUI will now recognize
  all known ISO 639-2 language codes in file names by default instead of only
  the top 100 of languages by native speakers.
* MKVToolNix GUI: multiplexer: on new installations the list of "often used
  languages" will by default only contain certain agnostic ones ("multiple
  languages", "no linguistic content", "reserved for local use", "uncoded
  languages"), "English" and the default user interface language. The "list of
  spoken languages by native speaks" isn't used anymore.
* MKVToolNix GUI: header editor: added an option to remove all attachments to
  the tree context menu.
* MKVToolNix GUI: while the GUI is running it will remember the last page that
  was selected when the preferences dialog is closed. Upon re-opening the
  preferences that page will be selected by default.

Bug fixes

* mkvmerge: fixed a segmentation fault when exiting prematurely due to write
  errors such as the destination having run out of space.
* mkvmerge: DTS: fixed wrong channel count for DTS tracks with XCh
  extensions.
* mkvmerge: MPEG TS reader: fixed detecting h.264/AVC and h.265/HEVC tracks
  that consist of only a single frame.
* mkvmerge: MPEG TS reader: fixed handling of unbounded PES sizes for tracks
  that consist of only a single PES packet.
* mkvmerge: MPEG TS reader: PGS subtitle tracks are now exempt from the
  "detect bogus subtitle timestamps" heuristic which could lead to some PGS
  subtitles not being timestamped correctly. Symptoms were that they were
  shown at the wrong time or that they were shown indefinitely.
* mkvmerge: MPEG TS reader: when reading MPLS playlists the start timestamps
  of a play items were handled wrong: all the timestamps of packets read were
  compared to that start timestamp, dropping those packets whose timestamps
  were smaller than the play item's start timestamp. The correct behavior is
  to accept all packets as soon as the first one with a timestamp equal to or
  larger than the play item's start timestamp is encountered. This could
  result in PGS subtitle entries located right at the start of the play item
  being garbled/lost as they consist of multiple PES packets for which some
  timestamps are often slightly smaller.
* mkvmerge: MPEG TS reader: when reading MPLS playlists mkvmerge will no
  longer read the whole M2TS files they reference, processing only the packets
  lying inside the timestamp range given by the playlists's play item's start
  & end timestamps. Instead mkvmerge will use the index information present in
  corresponding clip information (CLPI) files in order to seek to the nearest
  file position of the play item's start timestamp. Additionally mkvmerge will
  simply stop processing a file once the end timestamp is seen. This change
  greatly speeds up processing files from which only small portions must be
  read.
* mkvmerge: WavPack: fixed support for files created by v5 of the
  program. Checksums, DSD audio data and non-standard sampling rates are
  handled correctly. Patch by David Bryant.
* MKVToolNix GUI: multiplexer: fixed the cursor being positioned wrong after
  entering or pasting characters that aren't allowed in file names into the
  "destination file" control.

Build system changes

* libEBML v1.4.0 and libMatroska v1.6.0 are now required.

Other changes

* The source code repository's main development branch was renamed to `main`.

mkvtoolnix: updated to 47.0.0

Version 47.0.0 "Black Flag"

New features and enhancements

* mkvmerge: chapters: mkvmerge can now read chapters from DVDs if the user
  specifies the path to a DVD folder structure via the `--chapters …`
  parameter. By default chapters from the first title will be imported. This
  can be changed by append `:<title number>` to the file/directory name in the
  `--chapters …` argument, e.g. `--chapters /srv/dvds/BigBuckBunny/VIDEO_TS:3`
  This feature requires mkvmerge to have been built with the `libdvdread`
  library.
* mkvmerge: added `--engage append_and_split_flac` that enables mkvmerge to
  append and split FLAC tracks, restoring pre-v45 behavior.  The resulting
  tracks will be broken: the official FLAC tools will not be able to decode
  them and seeking will not work as expected.
* MKVToolNix GUI: multiplexer: added support for mkvmerge's new support for
  reading chapters from DVDs if both have been built with the `libdvdread`
  library.
* MKVToolNix GUI: multiplexer: when deriving languages from file names the GUI
  will now look for simplified language names instead of the full ones
  (e.g. instead of looking for "Greek, Modern (1453-)" it would simply look
  for "Greek").
* MKVToolNix GUI: multiplexer: the options in the "additional command-line
  options" dialog are now sorted alphabetically. Additionally the
  `--append-mode` option has been added as one of the only missing global
  options.
* MKVToolNix GUI: chapter editor: the chapter editor can now read chapters
  from DVDs if MKVToolNix has been build with the `libdvdread` library.
* MKVToolNix GUI: header editor: added an option in the preferences for
  displaying all date & time values in UTC instead of the local time
  zone.

Bug fixes

* all: fixed a crash when using the `MTX_LOGGER=file` syntax for logging debug
  messages without specifying a file name to log to. It will now log to a file
  called `mkvtoolnix-debug.log` in the system's default temporary directory,
  as initially intended.

Build system changes

* The [`libdvdread`](https://www.videolan.org/developers/libdvdnav.html)
  library will be used if found via `pkg-config`. If it is found, support for
  reading chapters from DVDs will be enabled in `mkvmerge` and the MKVToolNix
  GUI.
* Boost's Date/Time, Lexical Cast, Range, Range Adaptors, Tri-Bool, Variant
  libraries are not used anymore.
* MKVToolNix now requires a C++ compiler & standard library that support the
  following features of the C++17 standard: "`std::variant`", "`std::gcd`".
  For the GNU Compiler Collection (gcc) this means v7 or newer; for clang it
  means v4 or newer — the same versions required by earlier MKVToolNix
  versions.
* MKVToolNix now requires version 6.1.0 of fmtlib or later for the
  `fmt::to_string` function and bugfixes to the formatting of floating point
  numbers. If a system-wide version is installed that's older, the bundled
  copy will be used.
* The bundled version of fmtlib has been updated to release 6.2.1.

mkvtoolnix: updated to 46.0.0

Version 46.0.0 "No Deeper Escape"

New features and enhancements

* mkvmerge: when splitting, the placeholder `%c` can be used in the
  destination file name. It'll be replaced by the name of the first chapter in
  the file.
* mkvmerge: when reading MPLS playlists mkvmerge will include a tag named
  `SOURCE_ID` in the track's statistics tags that conveys the fact that the
  source was a Blu-ray and what the track's ID was in the source
  container. When reading Matroska file existing `SOURCE_ID` tags will be
  kept. The format used is the same format MakeMKV uses.
* mkvmerge: for audio-only files mkvmerge will now write a cue entry every
  500ms instead of every 2s.
* MKVToolNix GUI: job actions: split up the option "execute when the job
  finishes successfully or with warnings" into two separate options: "…when
  finishes successfully" and "…when exits with warnings".

Bug fixes

* mkvmerge: Matroska reader: when regenerating UIDs for chapters mkvmerge will
  now fix referencing tag chapter UID targets to have the same values.
* mkvmerge: MP4 reader: fixed a crash that could potentially happen while
  trying to identify H.265/HEVC tracks.
* mkvmerge: MP4 reader: when reading H.265/HEVC tracks without a frame offset
  table (`ctts` atom) present, mkvmerge did not parse the `hevcC` structure
  correctly in certain cases, causing no video frames to be output at all or
  the output not being playable.
* mkvmerge: MPLS handling/MPEG TS reader: timestamp restrictions as given in
  an MPLS file were only honored for the first play item, not for subsequent
  play items. For those play items the whole referenced file was always
  copied.
* mkvmerge: MPLS handling/MPEG TS reader: under certain circumstances mkvmerge
  copied one frame too many before switching to the next play item.
* mkvmerge: for audio-only files cues will only be created for I frames
  (important for e.g. TrueHD where decoding can only start on a sync
  frame).
* MKVToolNix GUI: fixed a crash that happened when closing the preferences
  after having closed at least one multiplexer tab.
* MKVToolNix GUI: macOS: changed the default of the "elide tab header labels"
  feature introduced in v45 from "no" to "yes" to mirror how versions before
  v45 behaved on macOS.

mkvtoolnix: updated to 45.0.0

Version 45.0.0 "Heaven in Pennies"

New features and enhancements

* mkvmerge: mkvmerge has never supported appending & splitting FLAC audio
  tracks. mkvmerge will now emit error messages when the user attempts either
  instead of continuing and creating invalid FLAC tracks.
* MKVToolNix GUI: added an option in the preferences to turn on eliding text
  on tab headers. If enabled, tab names will be shortened so that all tab
  headers fit into the window's width.
* MKVToolNix GUI: added an option in the preferences to disable all tooltips.
* MKVToolNix GUI: Windows: debug output sent via Qt's to Windows' debugging
  facility will use a more verbose message format including the application
  name, making it easier to filter for in SysInternal's "Debug View" utility.
* MKVToolNix GUI: multiplexer: if the file identification fails due to a JSON
  parser error, the output generated by `mkvmerge` will be output via Qt's
  debugging facility (viewable with SysInternal's "Debug View" utility on
  Windows; on other systems it's output on `STDERR`) allowing insight into
  what's gone wrong.
* MKVToolNix GUI: multiplexer: if an error occurs during file identification,
  the name of the processed file will be mentioned in the error message.
* MKVToolNix GUI: multiplexer: if an error occurs during identification of
  multiple files, the GUI will ask the user whether to continue or abort the
  identification process.
* MKVToolNix GUI: job queue: added an option in the preferences for removing
  completed jobs when exiting the program depending on their status.

Bug fixes

* mkvmerge: H.265/HEVC packetizer: fixed changing the NALU size length, it was
  using the wrong offset into the `hevcC` structure.
* mkvmerge: MP4 reader: fixed calculating the duration of video tracks that
  only contain a single frame.
* mkvmerge: MP4 reader: if there's no frame offset table (`ctts` atom) present
  for H.265/HEVC video tracks, mkvmerge will determine the timestamp order
  itself instead of relying on the timestamps in the MP4 being in the
  presentation order required by Matroska.
* mkvpropedit: Windows: mkvpropedit wasn't caching when reading the file to
  modify, slowing down operations such as adding track statistics tags
  considerably.
* MKVToolNix GUI: multiplexer: when using the title as part of the destination
  file name (both automatically as well as using the "copy title to
  destination file name" function) all characters that aren't valid in a file
  name are replaced by hyphens.
* MKVToolNix GUI: multiplexer: the "copy title to destination file name"
  function was broken when the "make file name unique" option in the
  preferences was disabled. In that case the file base name was removed
  regardless of what the title was set to at the time.
* MKVToolNix GUI: multiplexer: when using the "show command line" menu option
  on Windows the path to the `mkvmerge` executable was shown with forward
  slashes instead of backslashes. This is a purely cosmetic fix as Windows
  supports both forward and backward slashes.
* MKVToolNix GUI: multiplexer: when adding Blu-ray playlists the GUI used to
  only look for the English version of the disc library information (title &
  cover images). Now the GUI will present all disc library entries in the
  "select playlist to add" dialog & let the user chose which one to use (if
  any).
* MKVToolNix GUI: multiplexer, info tool: fixed the "warn before overwriting"
  check wrt. jobs creating the same file.

mkvtoolnix: updated to 44.0.0

Version 44.0.0 "Domino"

New features and enhancements
* MKVToolNix GUI: header editor: the attachments can now be reordered via drag
  & drop.

Bug fixes
* mkvmerge: Matroska reader: when encountering certain errors in the track
  headers such as the codec ID not being present mkvmerge will simply skip
  those tracks instead of exiting with an error.
* MKVToolNix GUI: multiplexer: the "ask before overwriting" functionality did
  not look for the correct file names when splitting was active.

mkvtoolnix: updated to 43.0.0

Version 43.0.0 "The Quartermaster":

New features and enhancements
* MKVToolNix GUI: using one of the command line options `--info`,
  `--edit-headers` or `--edit-chapters` will make the GUI select the
  corresponding tool on startup even if no further file name is
  given.
* MKVToolNix GUI: multiplexer: added a setting in the preferences for changing
  the location of the MediaInfo executable for when the user accidentally
  selected the wrong one.

Bug fixes
* mkvmerge: AVC/h.264 parser: the order of the NALUs before each key frame was
  sometimes wrong: mkvmerge wrote SPS & PPS after SEI NALUs. Now SPS & PPS
  NALUs are always written before the other NALUs. Patch by Torsten
  Hauska.
* mkvmerge: AVC/h.264 parser: when additional SPS or PPS NALUs (with IDs that
  haven't been seen so far) are found mid-stream, mkvmerge will prepend all
  following key frames with all current valid SPS & PPS NALUs (just like when
  SPS & PPS NALUs are overwritten mid-stream).
* mkvmerge: MPEG TS reader: fixed detection of MPEG-1/2 video tracks
  consisting of very few frames.
* mkvmerge: Ogg Opus reader: fixed the handling of Ogg Opus streams that
  contain a just one Ogg page (`mkvmerge` aborted with an exception).
* MKVToolNix GUI: multiplexer: dragging & dropping XML files with chapters or
  tags to the GUI's window was broken in v42. Instead of adding the file names
  to the appropriate input boxes the GUI was running mkvmerge for file
  identification purposes which then failed.

mkvtoolnix: updated to 42.0.0

Version 42.0.0 "Overtime":

New features and enhancements
* mkvmerge: added an option for creating byte-identical files:
  `--deterministic <seed>`.
* mkvmerge: Matroska reader: mkvmerge will remove the `icpf` atom headers if
  they're present in frames read from Matroska files.
* mkvmerge: MP4 reader: ALAC tracks: the number of channels, sampling
  frequency and bit depth are now taken from the bitstream in order to fix
  bogus values on the container level.
* mkvpropedit: when changing track UIDs the referring elements in existing
  chapters & tags will be updated automatically, too.
* mkvinfo: when the option `-p`/`--hex-positions` is used, element positions
  will be output regardless of the verbosity level.
* mkvinfo: added the option `-P`/`--positions` for showing the position of
  each element in decimal regardless of the verbosity level used.
* mkvinfo: added the option `-o`/`--continue` for continuing processing when
  the first cluster is encountered regardless of the verbosity level
  used.
* mkvinfo: added the option `-a`/`--all` for outputting all sub-elements (even
  cues & seek head entries) and not stopping at the first cluster regardless
  of the verbosity level used.
* MKVToolNix GUI: multiplexer: added an option in the preferences for
  disabling adding cover images from Blu-ray discs.
* MKVToolNix GUI: multiplexer: added mkvmerge's new `--deterministic` option
  in the "additional command-line options" dialog.
* MKVToolNix GUI: header editor:: when changing track UIDs the referring
  elements in existing chapters & tags will be updated automatically,
  too.

Bug fixes
* mkvmerge: HEVC ES parser: fixed a bug in the slice parser calculating the
  size of a field which in turn could have led to the slice's type being read
  wrong.
* mkvmerge: Matroska reader: fixed a segmentation fault when trying to read a
  file that uses header removal compression but no removed bytes are present
  in the track headers.
* mkvmerge: MPEG elementary stream parser: fixed an invalid memory access and
  use of uninitialized memory that could happen under certain
  circumstances.
* mkvmerge: RealMedia reader: fixed a division by zero when all audio
  timestamps were zero.
* mkvmerge: RealMedia reader: fixed an invalid memory access in the video
  frame assembly code triggered by invalid data in the file.

Build system changes
* `std::optional` (C++17 feature) is now used instead of `boost::optional`.
* `std::regex` is now used instead of `boost::regex`.

Other changes
* New man page translations into French, Italian, Russian and Chinese
  Traditional have been added.

mkvtoolnix: updated to 41.0.0

Version 41.0.0 "Smarra"

New features and enhancements
* mkvmerge: Matroska reader: Vorbis tracks: stream comments (aka Vorbis
  comments) will be converted to Matroska attachments (for cover arts) and
  Matroska track tags (for other comments). Additionally the stream comments
  will be removed from Vorbis headers.
* mkvmerge: MP4 reader: added support for reading Opus audio from MP4
  files.
* mkvmerge: MP4 reader: added support for reading VP9 video from MP4
  files.
* mkvmerge: Ogg reader: Vorbis, Opus & VP8 streams: stream comments (aka
  Vorbis comments) will be converted to Matroska attachments (for cover arts)
  and Matroska track tags (for other comments). Additionally the stream
  comments will be removed from Vorbis headers.
* mkvmerge: WAV reader: added support for reading RF64 files.
* MKVToolNix GUI: multiplexer: the list of predefined track names is now split
  up into three lists, one for each track type (audio, video &
  subtitles).
* MKVToolNix GUI: multiplexer: when trying to add thumbnails for a Blu-ray the
  GUI will determine the thumbnail's pixel size from the thumbnail files if
  the XML file doesn't contain that information. This works for JPEG and PNG
  files.
* MKVToolNix GUI: general: line edits & combo boxes will now have a "clear
  text" button appear whenever they're not empty.
* MKVToolNix GUI: update check: the dialog showing the latest news & version
  information states explicitly where the links take the user (the MKVToolNix
  `NEWS.md` file and YouTube respectively).

Bug fixes
* mkvmerge: Matroska reader: mkvmerge did not copy the codec's private data
  when reading WavPack from Matroska files.
* mkvmerge: MPLS handling: re-added caching when using MPLS playlists as input
  files.
* mkvmerge: MPEG TS reader: when reading an MPLS playlist, the calculation of
  the minimum timestamp to use for shifting all output timestamps to zero was
  wrong. It was wrongfully considering timestamps from packets it would not
  copy due to the MPLS's timestamp restrictions. This could lead to the first
  timestamps in the output file being quite large, e.g. more than a couple of
  minutes, causing sync problems when multiplexing together with other
  files.
* MKVToolNix GUI: multiplexer: the automatic switch between aspect ratio &
  display width/height wasn't reflected in the configuration generated for
  `mkvmerge`. The user had to change between the two settings manually
* MKVToolNix GUI: multiplexer: the progress dialog shown when scanning a
  Blu-ray wasn't closed properly in certain situations.
* MKVToolNix GUI: general: the configured font was not applied to a lot of
  controls (e.g. the file & track lists or the menu entries) on application
  startup. Instead the user had to open & close the preferences in order for
  the font to be applied to all controls.

mkvtoolnix: updated to 40.0.0

Version 40.0.0 "Old Town Road + Pony":

New features and enhancements
* mkvmerge: MP4 reader: added support for BMP covert art images.
* MKVToolNix GUI: multiplexer: added an option to disable deriving the
  destination file name from the file title.
* MKVToolNix GUI: multiplexer: the content of the "stereoscopy" combo box has
  been simplified making the box's minimum width much smaller, allowing the
  user to resize the GUI's whole window to a much smaller width.
* MKVToolNix GUI: multiplexer: whenever the user changes the "aspect ratio" or
  "display dimensions" controls, the corresponding radio button will be
  activated automatically.
* MKVToolNix GUI: Windows: added a setting in the preferences to disable the
  GUI's dark color mode even if Windows's app color mode is set to
  dark.
* MKVToolNix GUI: Windows: replaced the dark mode introduced in v39 with
  another dark mode that's less wasteful with space between widgets.

Bug fixes
* mkvmerge: MP4 reader: mkvmerge was reading eight bytes too many for cover
  art images. This could cause file identification to fail when the cover art
  was located at the end of the MP4 file. Even if it succeeded, this meant too
  much data present in the attachment.
* mkvmerge: MP4 reader: covert art images with unknown image types will be
  skipped instead of treated as JPEG images.

Build system changes
* Qt 5.9.0 or newer is now required for building MKVToolNix GUI.

mkvtoolnix: updated to 39.0.0

Version 39.0.0 "In The Waiting Line":

New features and enhancements

* mkvmerge: Blu-ray: when reading an MPLS playlist mkvmerge will look up and
  use chapter names from the Blu-ray's "track/chapter names" meta data if it
  exists.
* mkvmerge: MP4 reader: if present, cover art images (the
  `meta.udta.ilist.covr` atom) will be converted into attachments.
* MKVToolNix GUI: multiplexer: when adding a playlist from a Blu-ray disc, the
  disc library meta data will be parsed, and the biggest thumbnail, if
  present, will be added as a new attachment with name `cover.jpg` (extension
  depends on thumbnail's extension).
* MKVToolNix GUI: multiplexer: when adding a playlist from a Blu-ray disc, the
  title from the disc library meta data will be set as the new file title if
  the disc library meta data contains one & no title has been set yet.
* MKVToolNix GUI: multiplexer: the automatically generated destination file
  name will now be based on the file title if one is set at that point. This
  works in conjunction with the title being said from the Blu-ray disc library
  meta data.
* MKVToolNix GUI: chapter editor: when reading chapters from an MPLS playlist
  the GUI will look up and use chapter names from the Blu-ray's "track/chapter
  names" meta data if it exists. Part of the implementation of 2486.
* MKVToolNix GUI: Windows: added a dark mode that's enabled when Windows 10's
  dark mode is turned on.
* translations: added a Bulgarian translation of the programs & the man pages
  by Симеон Цветков (see `AUTHORS`).

Bug fixes

* mkvmerge: attachments without a file name won't be ignored anymore.
* MKVToolNix GUI: header editor: attachments with an empty name element will
  be shown as `<unnamed>` as originally intended.
* Linux AppImage: the AppImage will no longer change directories before
  running the desired executable allow the use of relative file names.

Build system changes

* MKVToolNix now requires a C++ compiler that supports the following features
  of the C++17 standard: "`[[maybe_unused]]` attribute", "nested namespace
  definition", "structured bindings". For the GNU Compiler Collection (gcc)
  this means v7 or newer; for clang it means v4 or newer.
* Boost 1.60.0 or newer is now required.

mkvtoolnix: updated to 38.0.0

Version 38.0.0 "The Silent Type":

New features and enhancements
* mkvextract: chapters, tags & cue sheets will now be written to standard
  output if no file name is given, same as if `-` is given as the file name.
* MKVToolNix GUI: job queue: added a new setting in the preferences' "job
  queue & job status" section that, when enabled, will cause the GUI to remove
  all output files created by jobs that are either aborted by the user or that
  end in an error.

Bug fixes
* all programs: macOS: fixed file access if the file name (including all path
  components) contains any Unicode character where NFC (Normalization Form
  Canonical Composed) and NFD (Normalization Form Canonical Decomposed)
  differ, e.g. German Umlauts.
* mkvmerge: when splitting by chapters the user can now split by chapters
  coming from one of the appended files, too.
* mkvmerge: AAC reader: fixed reading codec parameters (channels, sample rate)
  if a file starts with garbage that includes valid-but-bogus AAC
  headers.
* MKVToolNix GUI: Hebrew was added to the list of often-used languages so that
  it can be selected by default again.
* MKVToolNix GUI: when updating the GUI's settings from v37.0.0 or older, the
  GUI checks if the list of often-used languages equals the built-in list from
  v36.0.0. If it does, it will be updated to the built-in list changed in
  v37.0.0.

Build system changes
* Boost's Operators header library is now required.

mkvtoolnix: updated to 37.0.0

Version 37.0.0 "Leave It"

New features and enhancements

* MKVToolNix GUI: the list of often used languages now contains those from
  Wikipedia's "List of languages by native speakers" by default. Also by
  default only those languages will be shown in the language drop-down boxes.

Bug fixes

* MKVToolNix GUI: multiplexer: fixed a bug in the "make destination file names
  unique" logic that caused an existing number-in-parenthesis at the end of
  the file base name to be removed in certain situations (e.g. when the first
  added file was named `m (3).mkv` and both `m (3) (1).mkv` and `m (3)
  (2).mkv` existed already, the GUI was suddenly use `m.mkv` instead of `m (3)
  (3).mkv`).
* MKVToolNix GUI: on Windows the GUI is built with a slightly older version of
  the Qt library again (5.12.4). The Qt version used in release v36.0.0,
  v5.13.0, lead to crashes when doing certain things such as selecting
  multiple tracks in the multiplexer.

mkvtoolnix: updated to 36.0.0

Version 36.0.0 "Is That Jazz?"

New features and enhancements
* mkvmerge: mkvmerge now allows appending AV1, VP8, VP9, H.264/AVC and
  H.265/HEVC tracks whose pixel dimensions differ.

Bug fixes
* source code: fixed building with Boost 1.71.0.
* all: fixed the spelling of the H.264 & H.265 codec names.
* mkvmerge: Blu-ray MPLS handling: mkvmerge will now find corresponding M2TS
  files even if the `clip_codec_identifier` playlist item field is not set to
  `M2TS` in the MPLS file.
* mkvmerge: fixed handling of text files that use both DOS-style and
  Unix-style line endings resulting in problems such as text subtitle files
  not being parsed correctly.

mkvtoolnix: updated to 35.0.0

Version 35.0.0 "All The Love In The World"

New features and enhancements
* mkvmerge: JSON identification: the "codec name" track property will be
  output as `codec_name`. The JSON schema has been bumped to v12 for this
  change.
* MKVToolNix GUI: job queue: added a new type of action to execute after job
  completion: deleting source files for of multiplexer jobs. As this is a
  destructive operation, the action is disabled by default.

Bug fixes
* mkvmerge: the "codec name" track property wasn't copied from Matroska
  files.
* MKVToolNix GUI: multiplexer: Windows: clearing the destination file name
  will reset the tab name to "\<No destination file\>" again.
* MKVToolNix GUI: multiplexer: the file types were not re-translated if the UI
  language was changed.

mkvtoolnix: updated to 34.0.0

Version 34.0.0 "Sight and Seen":
Bug fixes
* mkvmerge: all subtitle frames are now treated as key frames in order to fix
  wrong data in source files.
* mkvmerge: AV1: fixed frame timestamp calculation when reading bitstreams
  that lack timing information from IVF files.
* mkvmerge: Matroska reader: fixed an infinite loop that could happen with
  large video frames and applied timestamp files due to too much data being
  buffered at the wrong time.

mkvtoolnix: updated to 33.1.0

Version 33.1.0 "Primrose"

Bug fixes
* MKVToolNix GUI: multiplexer: Windows: using UNC paths
  (e.g. \\server\Videos) when the option "automatically set the destination
  file name" was set in the preferences, the GUI would create a destination
  file name with forward slashes (e.g. //server/Videos/outputfile.mkv), a
  syntax not supported by mkvmerge.
* build system: the programs were accidentally built without stack protection
  (-fstack-protector-strong) on recent versions of gcc and clang.


Version 33.0.0 "A Little Bit of Madness"

Bug fixes
* mkvinfo: when using the --size option, mkvinfo will now report the
  correctly if an element has an unknown size.
* MKVToolNix GUI: info tool: clusters with an unknown size will now be read
  and displayed correctly.
* MKVToolNix GUI: multiplexer: Windows: trying to open Blu-ray index or
  playlist files failed when the path to the files contained symbolic links
  (e.g. when mounting a drive in a sub-folder via Windows' disk management
  utility).
* MKVToolNix GUI: multiplexer: if a destination file names ends with a number
  in parenthesis (e.g. a year such as "(2017)"), that number will not be
  stripped anymore during the process of ensuring the destination file name is
  unique. Only those suffixes added automatically in prior attempts to make
  the file name unique will be removed.
* MKVToolNix GUI: multiplexer: Windows: the GUI will let the user change the
  drive letter part of the destination file name freely again and only verify
  its validity right before starting to mux/adding to the job queue. Before it
  tried to force that into something valid, often resulting in unintentional
  paths (such as "C:\users\…\DC\files\…").

mkvtoolnix: updated to 32.0.0

Version 32.0.0 "Astral Progressions":

New features and enhancements
* mkvinfo: when sizes are output the size of the element's data portion is
  output in addition to the element's total size.
* MKVToolNix GUI: info tool: the element's data portion is
  shown as an extra column.
* MKVToolNix GUI: multiplexer: added column "Delay" to the track list
  containing the additional delay to apply during multiplexing.

Bug fixes
* all: fixed handling of Unicode code points > U+FFFF.
* mkvmerge: Windows: mkvmerge was crashing with an exception when trying to
  identify certain files that can be used on Blu-rays (such as MPEG transport
  streams of MPLS play list files) and when the file name was given as a UNC
  path (e.g. `\\servername\sharename\path\to\file.m2ts`). The GUI emitted
  errors such as "the JSON output could not be parsed" in that case.
* MKVToolNix GUI: the portable mode wasn't detected correctly when the current
  working directory the GUI was started from wasn't the directory the GUI's
  executable file was located it. Examples for when this is the case are
  Windows' "send to" or "open with" functions.
* MKVToolNix GUI: multiplexer: using button to change the current destination
  directory to one of the recently used ones did not update the file name
  according to the "make file name unique" setting.
* MKVToolNix GUI: multiplexer: the function "set destination file name from
  selected file's name" will now only change the destination file's name but
  not its path.

Build system changes
* libEBML v1.3.7 and libMatroska 1.5.0 are now required as they fix their
  handling of Unicode code points > U+FFFF.

mkvtoolnix: fix buildling on macOS; remove DRAKE_FLAGS because current rake automatically chosses number of jobs

mkvtoolnix: updated to 31.0.0

Version 31.0.0 "Dolores In A Shoestand":

New features and enhancements
* all programs: added a new option --abort-on-warnings that will cause the
  program to abort after it has emitted the first warning, similar to how it
  aborts after the first error.
* mkvmerge, mkvextract: when closing files that were opened for writing,
  cached data will not be flushed to storage automatically anymore. This
  reverts the workaround implemented for 2469. A new option was added to both
  programs (--flush-on-close) that re-enables flushing for people who are
  affected by data loss such as described in 2469.

  The reason is that automatic flushing causes long delays in processing
  queues when the output by mkvmerge/mkvextract isn't the final product but
  just an intermediate result to be processed further.
* MKVToolNix GUI: multiplexer: the dialog previewing different character sets
  for text subtitles will now keep the position of the displayed text when
  switching between character sets.

Bug fixes
* mkvmerge: AVI reader: using DV type 1 AVIs will now result in an unsupported
  file type being reported (as the underlying AVI library doesn't support
  them) instead of crashing mkvmerge.
* mkvmerge: HEVC: the height of interlaced streams will now be set correctly
  to the height of the full frame instead of the height of a single interlaced
  field.
* mkvmerge: MP4 reader: edit lists consisting solely of elements that mkvmerge
  doesn't support (such as dwells) are simply ignored. Before no data was read
  for such tracks at all.
* mkvmerge: text subtitles: entries with an explicit duration of 0ms will now
  be handled correctly: the 0ms duration will be stored in Matroska instead of
  the difference between the current and the following entry.
* MKVToolNix GUI: multiplexer, chapter editor: fixed drag & drop handling with
  Qt 5.12.0 and newer.
* MKVToolNix GUI: multiplexer: the GUI did not clean up temporary files
  created when running mkvmerge.

Build system changes
* Qt 5.4.0 or newer has required (up from 5.3.0) since version 30.0.0; I just
  forgot to include this entry.

mkvtoolnix: updated to 30.1.0

Version 30.1.0 "Forever And More":

Bug fixes
* build system: fixed building on non-UTF-8 locales.
* MKVToolNix GUI: multiplexer: implemented a workaround for drag & drop not
  working on macOS with Qt 5.12 due to a bug in Qt 5.12.
* MKVToolNix GUI: chapter editor: when opening a Matroska/WebM file that
  doesn't contain chapters and later saving chapters back to them, the editor
  was truncating the file down to a couple of KB in size.

mkvtoolnix: updated to 30.0.0

Version 30.0.0 "Interstellar"

New features and enhancements
* mkvextract: WAV extractor: mkvextract will now write W64 files instead of
  WAV files if the file name extension is `.w64` or if the final file size is
  bigger than 4 GB, the file size limit for WAV files.
* MKVToolNix GUI: multiplexer: a new button was added next to the "destination
  file" controls. Clicking it shows a menu with the ten most recently used
  output directories. Selecting one of them will change the destination file
  to the selected directory keeping the file name.
* MKVToolNix GUI: multiplexer (preferences): the ten most recently used values
  for the "relative output directory" and "fixed output directory" settings
  are now saved. The corresponding settings have been changed into combo boxes
  allowing quick access to those recent values.
* MKVToolNix GUI: multiplexer (preferences): the predefined split sizes and
  durations can now be customized in the preferences.
* MKVToolNix GUI: chapter editor: added an option in the "Chapter editor" menu
  for appending chapters from an existing file to the currently open editor
  tab.
* MKVToolNix GUI: chapter editor: added an action in the context menu for
  copying the selected entry and all of its children to another open editor
  tab.

Bug fixes
* mkvmerge: all files opened for writing will now be flushed once before
  they're closed. This ensures the operating system actually writes all cached
  data to disk preventing data loss in certain situations such as power
  outages or buggy drivers in combination with suspending the computer.
* mkvmerge: AAC: under certain conditions 8 channel audio files were taken for
  7 channel ones.
* MKVToolNix GUI: multiplexer: removing a file added as an "additional part"
  will no longer cause a crash.
* source code: fixed compilation with Boost 1.69.0 after API-breaking change
  to the `boost::tribool` class.

revbump for boost 1.69.0

mkvtoolnix: Fix runtime crash on SunOS.  Bump PKGREVISION.

mkvtoolnix: updated to 29.0.0

Version 29.0.0 "Like It Or Not"

Important notes
* The string formatting library used was switched from boost::format to
  [fmt](http://fmtlib.net/). See the section "Build system changes" for
  details.

New features and enhancements
* MKVToolNix GUI: added an option in the preferences for disabling automatic
  scaling for high DPI displays.
* MKVToolNix GUI: the GUI will now prevent the system from going to sleep
  while the job queue is running. This feature is implemented for macOS,
  Windows and Linux/Unix systems where the org.freedesktop.login1.Manager
  D-Bus interface is available.

Bug fixes
* mkvmerge: chapter generation: the start timestamps of chapters generated in
  intervals was wrong for files whose smallest video timestamp was bigger than
  0.
* mkvmerge: MP4 reader: fixed handling of atoms whose size exceeds the parent
  atom's size.
* mkvmerge, MKVToolNix GUI's chapter editor: the chapter name template will
  now also be used when reading Ogg-style chapter files with empty chapter
  names.
* mkvextract: AAC: mkvextract will now write the program config element (PCE)
  before the first AAC raw data packet if the PCE is present in the
  AudioSpecificConfig structure in the Codec Private Matroska element. The
  PCE carries vital information about the number of channels and is required
  in certain cases.
* mkvpropedit, MKVToolNix GUI's header editor: in situations when a one-byte
  space must be covered by a new EBML void element the following element must
  be moved up instead. If that moved element is a cluster, the corresponding
  cue entries will now be updated to reflect the cluster's new position.
* MKVToolNix GUI: Windows: the application manifest is now included properly
  so that Windows actually recognizes it.

Build system changes
* Qt's D-Bus implementation is now required for building on systems other than
  macOS and Windows,
* The boost::format library is not used anymore.
* The [fmt library](http://fmtlib.net/) is now required. Versions 3 and
  newer are supported. As not all Linux distributions include packages for the
  library, its release 5.2.1 comes bundled with MKVToolNix. The configure
  script will check for a system version of the library and use it if present
  and recent enough. Otherwise it will fall back to the bundled version and
  link that statically.

Pullup ticket #5855 - requested by maya
multimedia/mkvtoolnix: security fix

Revisions pulled up:
- multimedia/mkvtoolnix/Makefile                                1.116-1.117
- multimedia/mkvtoolnix/distinfo                                1.55-1.56

---
   Module Name:    pkgsrc
   Committed By:   adam
   Date:           Wed Oct 24 10:55:07 UTC 2018

   Modified Files:
           pkgsrc/multimedia/mkvtoolnix: Makefile distinfo

   Log Message:
   mkvtoolnix: updated to 28.1.0

   Version 28.1.0 "Morning Child":

   Bug fixes

   * mkvmerge: AV1 parser: fixed an error in the sequence header parser if
     neither the reduced_still_picture_header nor the
     frame_id_numbers_present_flag is set.
   * mkvmerge: AV1 parser: when creating the av1C structure for the Codec
     Private element the sequence header OBU wasn't copied completely: its common
     data (type field & OBU size among others) was missing.
   * mkvmerge: Matroska reader, AV1: mkvmerge will try to re-create the av1C
     data stored in Codec Private when reading AV1 from Matroska or WebM files
     created by mkvmerge v28.0.0.
   * MKVToolNix GUI: info tool: the tool will no longer stop scanning elements
     when an EBML Void element is found after the first Cluster element.

---
   Module Name:    pkgsrc
   Committed By:   maya
   Date:           Fri Oct 26 18:09:40 UTC 2018

   Modified Files:
           pkgsrc/multimedia/mkvtoolnix: Makefile distinfo

   Log Message:
   mkvtoolnix: update to 28.2.0. security fix.

   * mkvmerge, mkvinfo, mkvextract, mkvpropedit, MKVToolNix GUI's info tool &
     chapter editor: fixed a case of memory being accessed after it had been
     freed earlier. This can be triggered by specially crafted Matroska files and
     lead to arbitrary code execution. The vulnerability was reported as Cisco
     TALOS 2018-0694 on 2018-10-25.

mkvtoolnix: update to 28.2.0. security fix.

* mkvmerge, mkvinfo, mkvextract, mkvpropedit, MKVToolNix GUI's info tool &
  chapter editor: fixed a case of memory being accessed after it had been
  freed earlier. This can be triggered by specially crafted Matroska files and
  lead to arbitrary code execution. The vulnerability was reported as Cisco
  TALOS 2018-0694 on 2018-10-25.

mkvtoolnix: updated to 28.1.0

Version 28.1.0 "Morning Child":

Bug fixes

* mkvmerge: AV1 parser: fixed an error in the sequence header parser if
  neither the reduced_still_picture_header nor the
  frame_id_numbers_present_flag is set.
* mkvmerge: AV1 parser: when creating the av1C structure for the Codec
  Private element the sequence header OBU wasn't copied completely: its common
  data (type field & OBU size among others) was missing.
* mkvmerge: Matroska reader, AV1: mkvmerge will try to re-create the av1C
  data stored in Codec Private when reading AV1 from Matroska or WebM files
  created by mkvmerge v28.0.0.
* MKVToolNix GUI: info tool: the tool will no longer stop scanning elements
  when an EBML Void element is found after the first Cluster element.

mkvtoolnix: updated to 28.0.0

Version 28.0.0 "Voice In My Head":

New features and enhancements
* mkvmerge: AV1 parser: updated the code for the finalized AV1 bitstream
  specification.
* mkvmerge: AV1 packetizer: updated the code for the finalized AV1-in-Matroska
  & WebM mapping specification.
* mkvmerge: AV1 support: the `--engage enable_av1` option has been removed
  again.
* mkvmerge: MP4 reader: added support for AV1.
* mkvmerge: DTS: implemented dialog normalization gain removal for extension
  substreams.
* mkvmerge, mkvextract: simple text subtitles: added a workaround for simple
  text subtitle tracks that don't contain a duration.
* mkvextract: added support for extracting AV1 to IVF.
* mkvextract: IVF extractor (AV1, VP8, VP9): precise values will be used for
  the frame rate numerator & denominator header fields for certain well-known
  values of the track's default duration.
* mkvmerge: VP9: mkvmerge will now create codec private data according to the
  VP9 codec mapping described in the WebM specifications.
* MKVToolNix GUI: automatic scaling for high DPI displays is activated if the
  GUI is compiled with Qt ≥ 5.6.0.
* MKVToolNix GUI: added a menu item ("Help" → "System information") for
  displaying information about the system MKVToolNix is running on in order to
  make debugging easier.
* MKVToolNix GUI: multiplexer, header editor: the user can enter a list of
  predefined track names in the preferences. She can later select from them in
  "track name" combo box.

Bug fixes
* mkvmerge: JSON identification: fixed a bug when removing invalid UTF-8 data
  from strings before they're output as JSON.
* mkvmerge: MP4/QuickTime reader: fixed handling of PCM audio with FourCC
  `in24`.
* mkvmerge: MPEG transport stream reader, teletext subtitles: the decision
  whether or not to keep frames around in order to potentially merge them with
  the following frame is made sooner. That avoids problems if there are large
  gaps between teletext subtitle frames which could lead to frames being
  interleaved too late.
* mkvextract: IVF extractor (AV1, VP8, VP8): the frame rate header fields
  weren't clamped to 16 bits properly causing wrong frame rates to be written
  in certain situations.
* mkvpropedit, MKVToolNix GUI's header editor: fixed file corruption when a
  one-byte space must be covered with a new EBML void element but all
  surrounding elements have a "size length" field that's eight bytes long
  already.

mkvtoolnix: updated to 27.0.0

Version 27.0.0 "Metropolis":

New features and enhancements
* mkvmerge: chapters: the timestamps of chapters read from containers or from
  chapter files can be adjusted (multiplication and addition) with the new
  `--chapter-sync` option or using the special track ID `-2` for the existing
  `--sync` option.
* MKVToolNix GUI: multiplexer: adjusted & added controls for mkvmerge's new
  feature of being able to adjust chapter timestamps.
* MKVToolNix GUI: multiplexer: the GUI can now ask for confirmation when the
  user is about to create a file that won't contain audio tracks. It does this
  by default if at least one source file contains an audio track.

Bug fixes
* mkvmerge: AC-3: dialog normalization gain removal was corrupting E-AC-3
  frames irreversibly by writing checksums in places where they didn't
  belong. Additionally only the first E-AC-3 frame in a Matroska was processed
  but not additional dependent frames in the same block.
* MKVToolNix GUI: fixed a leak of Windows font resources leading to a general
  slowdown and subsequent crash.

mkvtoolnix: updated to 26.0.0

Version 26.0.0 "In The Game":

New features and enhancements
* mkvmerge: chapter generation: if the name template given by
  --generate-chapters-name-template is empty, no names (ChapterDisplay
  master elements with ChapterString/ChapterLanguage children) will be
  generated for the chapter atoms.
* mkvmerge: chapters: chapter names generated from MPLS files will now use the
  name template if one is set via --generate-chapters-name-template.
* mkvmerge: mkvmerge will no longer abort with an error message if no audio,
  video and subtitle tracks should be multiplexed. This allows copying of
  chapters from non-chapter source files (e.g. Matroska or MP4 files).
* MKVToolNix GUI: the font size in the tool selector on the left will scale
  with the font size the user selects in the preferences.
* MKVToolNix GUI: the GUI will no longer automatically resize the columns in
  tree and list views to match the content size. Instead it remembers and
  restores the widths set by the user.
* MKVToolNix GUI: multiplexer: the chapter name template will now be set
  automatically to the name template in the preferences' "chapter editor"
  section. Additionally the option --generate-chapters-name-template … will
  be passed to mkvmerge in situations when mkvmerge will generate chapters
  (either because automatic generation is enabled or if chapters are generated
  for MPLS playlists).
* MKVToolNix GUI: chapter editor: if the chapter name template is empty,
  chapters will be generated without names.
* MKVToolNix GUI: chapter editor: added an option to remove all chapter names
  to the "additional modifications" dialog.

Bug fixes
* mkvmerge: Matroska reader: fixed wrong timestamps when appending Matroska
  files where the second Matroska file's first timestamp is bigger
  than 0.
* mkvmerge: MP4 reader: fixed division by zero errors during file
  identification if the timescale is 0 in the MVHD atom.
* mkvmerge: Windows Television DVR files are now recognized as an unsupported
  file type. This prevents mis-detection as MPEG-2 with an accompanying flood
  of error messages.
* MKVToolNix GUI: info tool: under certain circumstances "cues" were shown at
  the wrong level (inside the previous master element instead of on level 1).
* MKVToolNix GUI: job queue: fixed invalid memory handling and consequent
  crashes when using the "edit in corresponding tool & remove from job queue"
  option if one of the files in that job contained attached files.

Build system changes
* An AppStream metadata file will be installed in $prefix/share/metainfo.

mkvtoolnix: updated to 25.0.0

Version 25.0.0 "Prog Noir" 2018-07-12

New features and enhancements
* mkvmerge: SRT/ASS/SSA text subtitles: for files for which no encoding has
  been specified, mkvmerge will try UTF-8 first before falling back to the
  system's default encoding.
* mkvmerge: SRT/ASS/SSA/WebVTT text subtitles: a warning is now emitted if
  invalid 8-bit characters are encountered outside valid multi-byte UTF-8
  sequences.
* mkvmerge: Matroska & MPEG transport stream readers: the encoding of text
  subtitles read from Matroska files can now be changed with the
  `--sub-charset` parameter.
* Linux: starting with release 25 an AppImage will be provided which should
  run on any Linux distribution released around the time of CentOS 7/Ubuntu
  14.04 or later.
* macOS: translations: updated the `build.sh` script to build `libiconv` and a
  complete `gettext`. Together with an additional fix to how translation files
  are located, MKVToolNix can now use all interface languages on macOS,
  too.

Bug fixes
* mkvmerge: AVC/h.264: fixed file identification failing for certain
  elementary streams due to internal buffers not being cleared properly.
* mkvmerge: HEVC/h.265: fixed file identification failing for certain
  elementary streams due to internal buffers not being cleared properly.
* mkvmerge: MLP code: fixed various issues preventing MLP from being parsed
  correctly.
* mkvmerge: TrueHD/MLP packetizer; dialog volume normalization removal isn't
  attempted if the track is an MLP track as the operation is only supported
  for TrueHD, not MLP.
* mkvmerge: MPEG TS reader: when reading MPLS mkvmerge will now compare the
  MPLS's start and end timestamps against the transport stream's PTS instead
  of its DTS. Otherwise the first key frame of a video track might be dropped
  if it isn't the first in presentation order.
* mkvmerge: JSON identification: mkvmerge will ensure that all strings passed
  to the JSON output modules are valid UTF-8 encoded strings by replacing
  invalid bytes with placeholder characters. This avoids the JSON library
  throwing an exception and mkvmerge aborting on such data.
* mkvmerge: audio packetizers: mkvmerge will now keep discard padding values
  if they're present for packets read from Matroska files.
* mkvmerge: Ogg Opus reader: packet timestamps aren't calculated by summing up
  the duration of all packets starting with timestamp 0 anymore. Instead the
  algorithm is based on the Ogg page's granule position and which packet
  number is currently timestamped (special handling for the first and last
  packets in the stream).

  * This fixes the first timestamp if the first Ogg packet's granule position
    is larger than the number of samples in the first packet (= if the first
    sample's timestamp is bigger than 0). mkvmerge will keep those offsets now
    and inserts "discard padding" only where it's actually needed.
  * It also improves handling of invalid files where the first Ogg packet's
    granule position is smaller than the number of samples in the first packet
    (= the first sample's timestamp is smaller than 0). mkvmerge will now
    shift all timestamps up to 0 in such a case instead of inserting "discard
    padding" elements all over the place.
  * mkvmerge will no longer insert "discard padding" elements if the
    difference between a) the calculated number of samples in the packet
    according to the granule position and b) the actual number of samples as
    calculated from the bitstream is one sample or less and if the packet
    isn't the last one in the stream. This circumvents certain rounding
    errors.
  * The timestamp of the first packet after a gap in the middle of the stream
    is now calculated based on the Ogg page the packet belongs to, and not
    based on the timestamps before the gap.

* mkvmerge: complete rewrite of the progress handling. It's now based upon the
  total size of all source files and the current position within them instead
  of the number of frames/blocks to be processed. This simplifies calculation
  when appending files and fixes rare cases of when progress report was
  obvious wrong (e.g. stuck at 0% right until the end).
* MKVToolNix GUI: header editor: non-mandatory elements couldn't be removed
  anymore due to a regression while fixing 2320. They can now be removed
  again.

mkvtoolnix: updated to 24.0.0

Version 24.0.0 "Beyond The Pale":

New features and enhancements
* mkvmerge: MP4 reader: improved the detection of edit lists consisting of two
  identical entries, each spanning the file's duration as given in the movie
  header atom. The second entry is ignored in such cases.
* mkvmerge: JSON identification: the "display unit" video track property is
  now reported as `display_unit`. The JSON schema has been bumped to v11 for
  this change.
* mkvmerge, mkvextract: AVC/h.264: empty NALUs will now be removed.
* mkvextract: VobSub extraction: empty SPU packets will now be dropped during
  extraction as other tools such as MP4Box cannot handle them
  correctly.

Bug fixes
* mkvmerge: E-AC-3 parser: fixed determining the number of channels for
  streams that contain an AC-3 core with dependent E-AC-3 frames.
* mkvmerge: Matroska reader: fixed mkvmerge buffering the whole file if a
  video track is multiplexed that consists of only one or a few frames.
* mkvmerge: the "display unit" video track property will now be kept if it is
  set in the source file.
* MKVToolNix GUI: multiplexer: when scanning playlists, all playlists were
  offered for selection regardless of the value of the "minimum playlist
  duration" setting.
* MKVToolNix GUI: multiplexer: deriving track languages from file names: the
  regular sub-expressions for ISO 639-1 codes could match on empty strings,
  too, causing matches in wrong places and hence no language being recognized
  in certain situations.
* MKVToolNix GUI: header editor: fixed a crash when saving the file fails
  (e.g. because it isn't writable).
* MKVToolNix GUI: header editor: the editor was wrongfully claiming that
  mandatory elements with default values cannot be removed in the "status"
  text.
* MKVToolNix GUI: preferences: on macOS & Linux the setting "enable copying
  tracks by their type" wasn't restored on program start.

Other changes
* Niels Lohmann's JSON library: the bundled version has been updated from
  v1.1.0 (git revision 54d3cab) to v3.1.1 (git revision g183390c1).
* pugixml library: the bundled version has been updated from v1.8 to v1.9

mkvtoolnix: updated to 23.0.0

Version 23.0.0 "The Bride Said No":

New features and enhancements

* mkvmerge: input: format detection uses file-extension to improve performance
  and to give preference when several formats match.
* mkvmerge: AV1: added support for reading AV1 video from Open Bitstream Unit
  files.
* mkvmerge: AV1: adjusted the code for the AV1 bitstream format changes made
  up to 2018-05-02.
* mkvmerge: MP4 reader: if a track has an edit list with two identical
  entries, each spanning the file's duration as given in the movie header
  atom, then the second entry will now be ignored. Improves the handling of
  files with bogus data.
* MKVToolNix GUI: multiplexer: added options to only enable tracks of certain
  types by default.
* MKVToolNix GUI: multiplexer: added an option to enable dialog normalization
  gain removal by default for all audio tracks for which the operation is
  supported.
* MKVToolNix GUI: multiplexer: when deriving track languages from the file
  names is active and the file name contains the usual season/episode pattern
  (e.g. "S02E14"), then only the part after the season/episode pattern will be
  used for detecting the language.
* MKVToolNix GUI: multiplexer: the regular expression used for deriving track
  languages from the file names can now be customized in the preferences.
* MKVToolNix GUI: multiplexer: the user can now customize the list of track
  languages the GUI recognizes in file names. This list defaults to a handful
  of common languages instead of the full list of supported languages.

mkvtoolnix: updated to 22.0.0

Version 22.0.0 "At The End Of The World"

New features and enhancements
* mkvmerge, MKVToolNix GUI multiplexer: AC-3, DTS, TrueHD: added an option for
  removing/minimizing the dialog normalization gain for all supported types of
  the mentioned codecs.
* mkvmerge: AV1: added support for reading AV1 video from IVF, WebM and
  Matroska files.
* mkvmerge: FLAC: mkvmerge can now ignore ID3 tags in FLAC files which would
  otherwise prevent mkvmerge from detecting the file type.
* mkvinfo: the size and positions of frames within "SimpleBlock" and
  "BlockGroup" elements are now shown the same way they're shown for other
  elements (by adding the `-v -v` and `-z` options).
* MKVToolNix GUI: multiplexer: added options for deriving the track languages
  from the file name by searching for ISO 639-1/639-2 language codes or
  language names enclosed in non-word, non-space characters (e.g. "…[ger]…"
  for German or "…+en+…" for English).
* MKVToolNix GUI: info tool: implemented reading all elements in the file
  after the first cluster. Only top-level elements are shown; child elements
  are only loaded on demand.
* MKVToolNix GUI: info tool: added a context menu with the option to show a
  hex dump of the element with the bytes making up the EBML ID and the size
  portion highlighted in different colors. In-depth highlighting is done for
  the data in `SimpleBlock` and `Block` elements.
* MKVToolNix GUI: chapter editor: added an option to remove all end timestamps
  to the "additional modifications" dialog.

Bug fixes
* mkvmerge: MP4 reader: fixed reading the ESDS audio header atom if it is
  located inside a "wave" atom inside the "stsd" atom.
* mkvmerge: MP4 reader: AAC audio tracks signalling eight channels in the
  track headers but only seven in the codec-specific configuration will be
  treated as having eight channels.
* mkvmerge: MPEG TS reader: fixed wrong handling of the continuity counter for
  TS packets that signal that TS payload is present but where the adaptation
  field spans the whole TS packet.
* mkvmerge: the 'document type version' and 'document type read version'
  header fields are now set depending on which elements are actually written,
  not on which features are active (e.g. if a `SimpleBlock` is never written,
  then the 'read version' won't be set to 2 anymore).
* mkvmerge: the 'document type version' header field is now set to 4 correctly
  if any of the version 4 Matroska elements is written.
* mkvinfo: summary mode: the file positions reported for frames in
  `BlockGroup` elements did not take the bytes used for information such as
  timestamp, track number flags or lace sizes into account. They were
  therefore too low.
* mkvpropedit, MKVToolNix GUI header editor: the 'document type version' and
  'document type read version' header fields are now updated if elements
  written by the changes require higher version numbers.
* mkvpropedit, MKVToolNix GUI header editor: mandatory elements can now be
  deleted if there's a default value for them in the specifications.
* source code: fixed a compilation error on FreeBSD with clang++ 5.0.

Build system changes
* A compilation database (in the form of a file `compile_commands.json`) can
  be built automatically if the variable `BUILD_COMPILATION_DATABASE` is set
  to `yes` (e.g. as `rake BUILD_COMPILATION_DATABASE=yes`).

mkvtoolnix: updated to 21.0.0

Version 21.0.0 "Tardigrades Will Inherit The Earth"

New features and enhancements
* mkvmerge: track statistics tags: the TagDefault element will not be
  written anymore as it was always set to the default value 1
  anyway. Implements 2202.
* mkvmerge, MKVToolNix GUI: JSON files can now contain C++-style line comments
  outside of strings (e.g. something like this: // this is ignored). Such
  comments, even though not part of the official JSON specifications, are now
  ignored when reading JSON files.
* MKVToolNix GUI: chapter editor: opening a Matroska file without chapters in
  it will now open the file in an empty chapter editor instead of showing an
  error message. Implements 2218.
* MKVToolNix GUI: an "info" tool has been added, replacing the functionality
  of mkvinfo's GUI. The functionality is not on par yet but will be for
  release v22. Implements most of the functionality of 2104.

Bug fixes
* build system: configure was treating --disable-ubsan and
  --disable-addrsan the same as --enable-ubsan and
  --enable-addrsan.
* build system: an error message is output if a command to execute is not
  found instead of silently failing.
* build system: in addition to looking for the gettext C function and
  library, configure now also verifies the presence of the msgfmt program
  instead of simply relying on it.
* mkvmerge: appending files with additional parts at the same time was broken
  if more than one additional part was appended (e.g. when appending files
  from DVDs with something like '(' VTS_01_1.VOB VTS_01_2.VOB ')' + '('
  VTS_02_1.VOB VTS_02_2.VOB ')'). In such a situation the content from files
  VTS_02_1.VOB and VTS_02_2.VOB where laid out in parallel to the content
  from the earlier files.
* mkvmerge: FLV reader: a single invalid AAC frame was written for AAC audio
  tracks with codec initialization data longer than five bytes.
* mkvmerge: FLV reader: timestamps will be normalized down to 0.
* mkvmerge: MP4 reader: if an AAC track doesn't contain an AAC-specific
  decoder configuration in the ESDS portion, then a default decoder
  configuration will be generated based on the track's header data instead of
  skipping the track.
* mkvmerge: MP4 reader: fixed reading HEVC/h.265 video tracks if they're
  stored as Annex B byte streams inside MP4.
* mkvmerge: Ogg Opus reader: mkvmerge will now emit a warning instead of
  aborting when it encounters an Ogg Opus page with no data in the
  packet.
* mkvmerge, mkvextract: Matroska parser: fixed a segmentation fault that
  occurred whenever the first level 1 element after resyncing after an error
  in the file structure isn't a cluster.
* mkvmerge, MKVToolNix GUI multiplexer & header editor: fixed a crash during
  --enable-addrsan.
* build system: an error message is output if a command to execute is not
* build system: an error message is output if a command to execute is not
  found instead of silently failing.
* build system: in addition to looking for the gettext C function and
  library, configure now also verifies the presence of the msgfmt program
  instead of simply relying on it.
* mkvmerge: appending files with additional parts at the same time was broken
  if more than one additional part was appended (e.g. when appending files
  from DVDs with something like '(' VTS_01_1.VOB VTS_01_2.VOB ')' + '('
  VTS_02_1.VOB VTS_02_2.VOB ')'). In such a situation the content from files
  VTS_02_1.VOB and VTS_02_2.VOB where laid out in parallel to the content
  from the earlier files.
* mkvmerge: FLV reader: a single invalid AAC frame was written for AAC audio
  tracks with codec initialization data longer than five bytes.
* mkvmerge: FLV reader: timestamps will be normalized down to 0.
* mkvmerge: MP4 reader: if an AAC track doesn't contain an AAC-specific
  decoder configuration in the ESDS portion, then a default decoder
  configuration will be generated based on the track's header data instead of
  skipping the track.
* mkvmerge: MP4 reader: fixed reading HEVC/h.265 video tracks if they're
  stored as Annex B byte streams inside MP4.
* mkvmerge: Ogg Opus reader: mkvmerge will now emit a warning instead of
  aborting when it encounters an Ogg Opus page with no data in the
  packet.
* mkvmerge, mkvextract: Matroska parser: fixed a segmentation fault that
  occurred whenever the first level 1 element after resyncing after an error
  in the file structure isn't a cluster.
* mkvmerge, MKVToolNix GUI multiplexer & header editor: fixed a crash during
  file type detection for attachments if MKVToolNix is installed in a path
  with non-ASCII characters (e.g. German Umlauts).
* mkvinfo: the --hex-positions parameter did nothing in summary mode.
* mkvinfo: Windows: line endings will be written as \r\n (carriage return &
  line feed) again instead of just \n (line feed).
* mkvpropedit: adding track statistics tags: for tracks with content encoding
  (compression) mkvpropedit is now accounting the uncompressed number of
  bytes, not the encoded (compressed) number of bytes.
* MKVToolNix GUI: multiplexer: the subtitle character set can now be set for
  appended subtitle files, too.
* MKVToolNix GUI: multiplexer: when appending, all tracks appended to disabled
  tracks will start out disabled, too.

Build system changes
* mkvinfo: the GUI portion has been removed. mkvinfo is now a pure
  command-line program again.

mkvtoolnix: Leave pkgsrc to handle security features.

mkvtoolnix: updated to 20.0.0

Version 20.0.0 "I Am The Sun":

Important notes

* Feature removal: several deprecated features have been removed:
  * mkvmerge: the deprecated options --identify-verbose (and its counterpart
    -I), --identify-for-gui, --identify-for-mmg and
    --identification-format verbose-text
  * all command line tools: support for the deprecated, old, proprietary format
    used for option files
  * all command line tools: support for passing command line options via the
    deprecated environment variables MKVTOOLNIX_OPTIONS, MKVEXTRACT_OPTIONS,
    MKVINFO_OPTIONS, MKVMERGE_OPTIONS and MKVPROPEDIT_OPTIONS

* mkvinfo: most of its code was re-written in order to lay the groundwork for
  including its functionality in MKVToolNix GUI but with more features than
  the existing mkvinfo GUI. The result is that a lot of its output has been
  changed slightly while keeping the basic layout. Changes include but aren't
  limited to:

  * Several element names are a bit clearer (e.g. Maximum cache instead of
    MaxCache).
  * All timestamps and durations are now output as nanoseconds in formatted
    form (e.g. 01:23:45.67890123). All additional formats (e.g. floating
    point numbers output in seconds or milliseconds) were removed.
  * Element names for chapters and tags are now translated if a translation is
    available.
  * Elements located in wrong positions within the Matroska document are
    handled better.

  While mkvinfo's output is mostly kept very stable, it is not designed to be
  parsed by other utilities. Even though I've tried hard to cram all changes
  and cleanups into this version, additional changes may be made in the next
  couple of releases depending on user feedback and bug reports.

New features and enhancements

* mkvmerge: AVC/h.264 packetizer (framed): access unit delimiter NALUs will
  now be removed.

Bug fixes

* mkvmerge: AVC/h.264 parser: when fixing the bitstream timing information
  mkvmerge will now use exact representations of the desired field duration if
  possible. For example, when indicating 50 fields/second num_units_in_tick
  is set to 1 and time_scale to 50 instead of 5368709 and 268435456.
* mkvmerge: AVC/h.264 parser: mkvmerge no longer assumes that encountering
  sequence parameter set or picture parameter set NALUs signal the start of a
  new frame.
* mkvmerge: AVC/h.264 packetizer (framed): when mkvmerge is told to fix the
  bitstream timing information, it will now update all SPS NALUs, not just the
  ones in the AVCC.
* mkvmerge: MPEG TS reader: TS packet payloads will only be treated as PES
  packets if the payload actually starts with a PES start code. The prior
  behavior led to wrong timestamps and potentially broken frame data.
* mkvmerge: MPEG TS reader: mkvmerge will now drop incomplete PES packets as
  soon as an error is detected in the transport stream instead of passing the
  incomplete frame to the packetizer. An error is assumed either if the
  transport_error_indicator flag is set or if the value of the
  continuity_counter header field doesn't match the expected value.
* mkvmerge: Opus: when re-muxing Opus from Matroska mkvmerge will now write
  "block duration" elements for all block groups where a "discard padding" is
  set, too.
* mkvmerge: SRT reader: mkvmerge can now handle SRT files with timestamps
  without decimal places (e.g. 00:01:15 instead of 00:01:15.000).
* mkvmerge: read buffer I/O class: the class could get out of sync regarding
  the file position of the underlying file I/O class causing wrong data to be
  returned on subsequent read operations. One result was that trying to
  identifying MPLS files that refer to very short M2TS files caused mkvmerge
  to segfault.
* mkvmerge: multiplexer core: if there's a gap in audio timestamps, a new
  block group/lace will be started for the first frame after each gap. Before
  the fix the frame after the gap was often stored in the previous block group
  causing the gap to be in the wrong place: at the end of that block
  group.
* mkvextract: AVC/h.264: if two consecutive IDR frames with the same
  idr_pic_id parameter and no access unit delimiters are found between them,
  mkvextract will insert an access unit delimiter in order to signal the start
  of a new access unit.
* MKVToolNix GUI: update check dialog: Markdown links will now be converted to
  clickable links.
* build system: fixed a race condition when creating new directories if rake
  is run with -jN in newer versions of Ruby/rake.

Build system changes
* [cmark](https://github.com/commonmark/cmark), the CommonMark parsing and
  rendering library in C, is now required when building the GUIs.

mkvtoolnix: updated to 18.0.0

Version 18.0.0 "Apricity" 2017-11-18

New features and enhancements
* build system: when building with clang v3.8.0 or newer, `configure` will no
  longer restrict optimization flags to `-O1` and use `-O3` again (older
  versions of clang suffered from excessive memory usage with higher
  optimization levels).
* build system: when building with mingw 7.2.0 or newer, `configure` will no
  longer restrict optimization flags to `-O2` and use `-O3` again (older
  versions of mingw suffered from bugs such as segmentation faults with higher
  optimization levels).
* build system: stack protection is enabled when building with clang 3.5.0 or
  newer on all platforms.
* mkvmerge: AVC & HEVC ES parsers: performance improvements by copying much
  less memory around.
* mkvmerge: tags: reintroduced a workaround for non-compliant files with tags
  that do not contain the mandatory `SimpleTag` element. This workaround was
  removed during code refactoring in release v15.0.0.
* GUI: multiplexer: the "AAC is SBR/HE-AAC/AAC+" checkbox in the "audio
  properties" section will be disabled if the functionality is not implemented
  for the selected track's codec & container.
* GUI: multiplexer: the "reduce to core" checkbox in the "audio properties"
  section will be disabled if the functionality is not implemented for the
  selected track's codec.

Bug fixes
* mkvmerge: AAC ADTS parser: fixed interpretation of the
  `channel_configuration` header element for ADTS files that do not contain a
  program configuration element: value 7 means 7.1 channels.
* mkvmerge: Matroska identification: the `date_local` and `date_utc`
  attributes will only be output if the identified Matroska file actually
  contains the "date" header field.
* mkvmerge: WebVTT: mkvmerge did not recognize timestamp lines if the hours
  components were absent.
* mkvpropedit, GUI's header editor: the `date` header field won't be added
  automatically anymore whenever the segment info section is edited and the
  `date` element is either deleted or not present in the first place.

mkvtoolnix: updated to 17.0.0

Version 17.0.0 "Be Ur Friend":

Important notes

* The word "timecode" has been changed to "timestamp" everywhere it was
  used in MKVToolNix. This affects program output (including mkvinfo's), GUI
  controls, command line parameters (e.g. `mkvmerge --timestamp-scale …`) and
  file formats. All programs remain backwards compatible insofar as they still
  accept "timecode" in all those places (e.g. `mkvmerge --timecode-scale …`).

  The reason for the change is wrong usage. What both the Matroska specification
  and MKVToolNix used "timecode" for is normally called a "timestamp" in audio &
  video domains. A "timecode" on the other hand has a specific meaning. As the
  Matroska specification is moving towards implementing real timecodes, it will
  also move towards correcting the verbiage. MKVToolNix is following this
  change.

* mkvextract's command line interface has been changed to allow extraction of
  multiple items at the same time. The first argument must now be the source
  file's name. All following arguments either set the mode (e.g. `tracks`) or
  specify what to extract in the currently active mode.

  Those items that were written to the standard output (chapters, tags and cue
  sheets) are now always written to files instead. Therefore the respective
  modes require an output file name.

  For example, extracting two tracks, the chapters and the tags can be done
  with the following command:

  `mkvextract input.mkv tracks 0:video.h265 1:audio.aac chapters chapters.xml tags tags.xml`

  The old interface (specifying the mode first and the source file name
  second) remains working and supported. However, it is now deprecated and
  will be removed at the end of 2018.

New features and enhancements

* mkvmerge: AC-3: during identification regular AC-3 and E-AC-3 tracks will
  now be identified differently for most container formats (exception: AVI,
  Real Media, Ogg/OGM). The codec will be reported as `AC-3` for regular AC-3
  and as `E-AC-3` for E-AC-3 tracks instead of the combined `AC-3/E-AC-3`.
* mkvextract: the command line interface has been changed to allow extraction
  of multiple items at the same time. See section "Important notes" for details.

Bug fixes

* mkvmerge: AAC ADTS parser: mkvmerge will now parse the
  `program_config_element` if it is located at the start of an AAC frame in
  order to determine the actual number of channels. This overrides invalid
  channel configurations in the ADTS headers, for example.
* mkvmerge: fixed AC-3 being misdetected as encrypted MPEG program streams
  under certain conditions.
* mkvmerge: Dirac: under certain conditions (e.g. only muxing a single Dirac
  track without any other tracks) mkvmerge was always setting the pixel width
  & height to 123. The frame rate was wrong, too.
* mkvmerge: E-AC-3 in Matroska: if AC-3 cores and their corresponding E-AC-3
  extension are located in two different Matroska blocks, then mkvmerge will
  now re-assemble them into a single block and only use the first block's
  timestamp.
* mkvmerge: SRT reader: fixed calculating the duration of entries starting
  with at a negative timestamp.
* mkvmerge: VC-1: under certain conditions (e.g. only muxing a single VC-1
  track without any other tracks) mkvmerge was always setting the pixel width
  & height to 123. The frame rate was wrong, too.
* mkvmerge: command line options: an error message will be output if the
  single-value-form of the `--sync` option is used and it isn't a number
  (e.g. `--sync 0:asd`).
* mkvpropedit, GUI's header editor: both programs will now show proper error
  messages instead of crashing when certain kinds of data corruption is found
  when reading a file.

mkvtoolnix: update to 16.0.0

Version 16.0.0 "Protest":

New features and enhancements

* mkvmerge: MP4 reader: added support for Vorbis.

Bug fixes

* configure: the checks for libEBML and libMatroska have been fixed to require
  libEBML 1.3.5 and libMatroska 1.4.7 as intended.

* mkvmerge: AAC reader: mkvmerge will now emit an error message for AAC files
  whose header fields imply a sampling frequency or number of channels
  of 0.
* mkvmerge: AVC/h.264 ES parser: fixed the calculation of reference
  information for P and B frames. This also fixes some P frames being marked
  as B frames and vice versa.
* mkvmerge: AVC/h.264 ES parser: only non-key frames that have the NALU header
  field `nal_ref_idc` set to 0 will be marked as "discardable" in
  `SimpleBlock` elements.
* mkvmerge: HEVC/h.265: the generation of the HEVCC structure stored in
  `CodecPrivate` was wrong in two places: 1. the position of the number of
  sub-layers was swapped with reserved bits and 2. the VPS/SPS/PPS/SEI lists
  did not start with a reserved 1 bit.
* mkvmerge: output: the `doc type version` will be set at least to 2 if
  certain elements are written (`CodecState`, `CueCodecState`,
  `FlagInterlaced`).
* mkvmerge: output: the track header attributes `MinCache` and `MaxCache` will not be
  written anymore.
* mkvmerge: Matroska reader: the "key" and "discardable" flags of SimpleBlock
  elements will be kept as they are.
* mkvmerge: Matroska reader: if present in the file, the "white colour
  coordinate x" track header attribute was written to both "white colour
  coordinate x" and "white colour coordinate y" in the output file.
* mkvmerge: Opus output: mkvmerge will now put all frames with discard padding
  into their own block group.
* MKVToolNix GUI: header editor: removed the check for external modification
  when saving the file.
* MKVToolNix GUI: job queue: fixed calculation of total progress when
  automatic removal of completed is enabled.

multimedia/mkvtoolnix: update to 15.0.0

Version 15.0.0 "Duel with the Devil":

Important notes
* mkvmerge, mkvpropedit, GUI's header and chapter editors: the programs will
  no longer add most missing Matroska elements that are mandatory but have a
  default value in the Matroska specification (e.g. the `TagLanguage` element
  with a value of `und` if it isn't present in its `SimpleTag` parent). Due to
  this change libEBML v1.3.5 is now required.

New features and enhancements
* MKVToolNix GUI: multiplex tool: added a new entry to the "source files"
  context menu labeled "Set destination file name from selected file's
  name". It will force the GUI to consider the selected file to be the
  reference for automatically setting the file name, no matter which file was
  originally added as the first file. It will also force setting the
  destination file name once if automatic destination file name generation is
  turned off in the preferences. Implements part of 2058.
* MKVToolNix GUI: multiplex tool: added an option in the preferences on
  "Multiplexer" → "Output" labeled "Only use the first source file that
  contains a video track". If enabled, only source files containing video
  tracks will be used for setting the destination file name. Other files that
  are added are ignore. Implements the rest of 2058.
* MKVToolNix GUI: header editor: added support for editing the video colour
  attributes. Implements the second half of 2038.
* MKVToolNix GUI: header editor: added support for the "video projection"
  track header attributes. Part of the implementation of 2064.
* MKVToolNix GUI: job queue: selected jobs can now be move up and down by
  pressing the `Ctrl+Up` and `Ctrl+Down` keys. Additionally, push buttons to
  move them up & down are shown if the corresponding option is enabled in the
  preferences. Implements 2060.
* mkvmerge: added support for the "video projection" track header
  attributes. Part of the implementation of 2064.
* mkvinfo: added support for the "video projection" track header
  attributes. Part of the implementation of 2064.
* mkvpropedit: added support for editing the video colour
  attributes. Implements one half of 2038.
* mkvpropedit: added support for the "video projection" track header
  attributes. Part of the implementation of 2064.

Bug fixes
* all: selecting the program's language (e.g. via the `--ui-language`
  command-line option or via the GUI's preferences) did not work on Linux &
  Unix if the `LANGUAGE` environment variable was set and didn't include the
  desired language. Fixes 2070.
* MKVToolNix GUI: removed the keyboard shortcuts for switching between the
  different tools (e.g. `Ctrl+Alt+1` for the multiplexer). They overlapped
  with basic functionality on keyboards that use an `AltGr` key, e.g. German
  ones, where `AltGr+7` emits `{`. As `AltGr+key` is implemented as
  `Ctrl+Alt+key` under the hood, this means that `AltGr+7` is really
  `Ctrl+Alt+7` which the GUI now took to mean "switch to the job queue"
  instead of "insert `{`". Fixes 2056.
* MKVToolNix GUI: header editor: after saving the file the GUI wasn't updating
  its internal file modification timestamp. That lead to the GUI wrongfully
  claiming that the file had been modified externally when the user wanted to
  save the file once more, requiring a reload of the file losing all
  modifications made since saving the first time.
* mkvmerge: DTS handling: some source files provide timestamps for audio
  tracks only once every `n` audio frames. In such situations mkvmerge was
  buffering too much data resulting in a single gap in the timestamps of one
  frame duration after frame number `n - 1` (the second audio timestamp read
  from the source file was used one output frame too early). Fixes 2071.
* mkvinfo: fixed a null pointer dereference if an `EbmlBinary` element's data
  pointer is a null pointer. Fixes 2072.

Build system changes
* configure: added option `--disable-update-check`. If given, the code
  checking online for available updates will be disabled. The update check is
  enabled and included in the GUI by default.
* libEBML v1.3.5 is now required.

Other changes
* mkvmerge: the option `--colour-matrix` has been renamed to
  `--colour-matrix-coefficients` in order to match the specification more
  closely. The old option name will continue to be recognized as well.

Fix patch to boost libraries and hackaround for the surprising error
messages.

Update to mkvtoolnix 9.5.0:
- bugfixes

Update mkvtoolnix to 9.4.0:
- restrict GUI option to Qt.
- disable compiler optimisation override
- new features:
  - support for Apple ProRes videos in MOV/MP4 files
  - much improves MPEG TS support
  - support WebVTT subtitles
  - output of Big Endian PCM to WAV supported
  - ${TOOL}_OPTIONS can be used for passing additional arguments to
    individual programs via environment
  - support for core-less DTS streams consisting solely of XLL extension
    sub-streams
  - time codes computation for AAC, AC-3, DTS, MP3 and TrueHD packets
    was rewritten
  - support TrueHD tracks inside MPEG TS by keeping (additional) AC-3
    audio track
  - support MPEG-H p2/HEVC video in MP4 container
  - support for AAC in LOAS/LATM multiplex if read from MPEG transport
    streams or raw LOAS/LATM AAC files
  - support for h.265/HEVC from MPEG TS and elementary streams
  - support for teletext subtitles from MPEG TS
  - faster format detection for text subtitle formats
  - support for DTS audio streams in MP4
  - support for VP9 from IVF and WebM files
  - support for Opus
  - support for reading ALAC from CAF and MP4 files
- 5 years of various bug fixes and GUI improvements.

Backout previous change.

Fix build problem on ruby23.

Add SHA512 digests for distfiles for multimedia category

Problems found locating distfiles:
        Package adobe-flash-plugin11: missing distfile flash-plugin-11.2.202.540-release.i386.rpm
        Package gmplayer: missing distfile mplayer/AlienMind-1.2.tar.bz2
        Package gmplayer: missing distfile mplayer/BlueHeart-1.5.tar.bz2
        Package gmplayer: missing distfile mplayer/CornerMP-aqua-1.4.tar.bz2
        Package gmplayer: missing distfile mplayer/MPlayer-1.1.1.tar.xz
        Package gmplayer: missing distfile mplayer/WMP6-2.2.tar.bz2
        Package gmplayer: missing distfile mplayer/gnome-1.1.tar.bz2
        Package gmplayer: missing distfile mplayer/hwswskin-1.3.tar.bz2
        Package gmplayer: missing distfile mplayer/neutron-1.6.tar.bz2
        Package gmplayer: missing distfile mplayer/plastic-1.3.tar.bz2
        Package gmplayer: missing distfile mplayer/slim-1.3.tar.bz2
        Package gmplayer: missing distfile mplayer/xine-lcd-1.2.tar.bz2
        Package handbrake: missing distfile handbrake/HandBrake-0.9.3.tar.gz
        Package handbrake: missing distfile handbrake/bzip2-1.0.5.tar.gz
        Package handbrake: missing distfile handbrake/faad2-2.6.1.tar.gz
        Package handbrake: missing distfile handbrake/lame-3.98.tar.gz
        Package handbrake: missing distfile handbrake/libdvdread-0.9.7.tar.gz
        Package handbrake: missing distfile handbrake/libmp4v2-r45.tar.gz
        Package handbrake: missing distfile handbrake/libquicktime-0.9.10.tar.gz
        Package handbrake: missing distfile handbrake/libtheora-1.0.tar.gz
        Package handbrake: missing distfile handbrake/mpeg2dec-0.5.1.tar.gz
        Package handbrake: missing distfile handbrake/x264-r1028-83baa7f.tar.gz
        Package handbrake: missing distfile handbrake/zlib-1.2.3.tar.gz
        Package libdvdcss: missing distfile libdvdcss-1.3.99.tar.bz2
        Package mplayer-share: missing distfile mplayer/MPlayer-1.1.1.tar.xz
        Package mpv: missing distfile mpv-0.12.0.tar.gz
        Package realplayer-codecs: missing distfile rp8codecs-20040626.tar.bz2
        Package realplayer-codecs: missing distfile rp8codecs-alpha-20050115.tar.bz2
        Package win32-codecs: missing distfile rp9codecs-win32-20050115.tar.bz2
        Package xanim: missing distfile xa2.0_cvid_netbsd386.o.gz
        Package xanim: missing distfile xa2.0_iv32_netbsd386.o.gz
        Package xanim: missing distfile xa1.0_cyuv_netbsd68k.o.gz
        Package xanim: missing distfile xa2.0_cvid_linuxELF.o.gz
        Package xanim: missing distfile xa2.0_iv32_linuxELF.o.gz
        Package xanim: missing distfile xa1.0_cyuv_sparcAOUT.o.gz
        Package xanim: missing distfile xa2.0_cvid_sparcELF.o.gz
        Package xanim: missing distfile xa2.0_iv32_sparcELF.o.gz
        Package xanim: missing distfile xa1.0_cyuv_linuxPPC.o.gz

Otherwise, existing SHA1 digests verified and found to be the same on
the machine holding the existing distfiles (morden).  All existing
SHA1 digests retained for now as an audit trail.

mbstate_t reference is always const with new boost.

Various fixes for SunOS support.

multimedia/mkvtoolnix: #include <unistd.h>

Fixes out-of-scope errors seen on gcc 4.7.x

Changes 5.0.1:
* build system: Updated the Debian/Ubuntu files to debhelper
  v7/quilt 3.0 format.
* mkvmerge: enhancement: Implemented support for yet another way
  of storing EAC3 and DTS in MPEG transport streams.
* mkvinfo: bug fix: Track information was not reset when opening
  more than one file in the GUI.
* mkvmerge: bug fix: The PGS subtitle output module was not
  outputting any packet in certain cases due to uninitialized variables.
* mkvmerge: bug fix: Fixed mkvmerge not finding any track in TS
  streams whose first PMT packet could not be parsed (e.g. invalid CRC).
* mkvmerge: bug fix: Fixed detection of TS streams that only
  contain one PAT or PMT packet within the first few KB but no
  others within the first 10 MB.

update to 5.0.0
changes: many fixes and improvements

pkgsrc note: This version hasn't been tested in practice yet. The
previous one had a problem with mkvmerge going into an endless loop.
We still have mkvtoolnix-old (2.9.8) as a known working one for
that reason.

Changes 4.6.0:
* build system: Fixed building the Qt version of mkvinfo's GUI (again).
* mmg: bug fix: If the header editor finds 'language' elements with ISO-639-1
  codes (e.g. "fra" instead of "fre" for "French") then it will map the code to
  the corresponding ISO-639-2 code
* mmg: bug fix: Fixed one of the issues causing mmg to report that it is
  configured to use an unsupported version of mkvmerge when the reported
  version was actually empty.
* mkvmerge: enhancement: HD-DVD subtitles are recognized as being an
  unsupported file format. This makes the error message presented to the user
  a bit clearer.
* build: Boost 1.36.0 or newer is required (up from 1.34.0). Also fixed
  building with v3 of Boost's filesystem library, e.g. with Boost 1.46.0
  Beta 1 or newer.
* mkvpropedit: new feature: Added support for adding, replacing and removing
  tags.
* all: Added a translation for the programs into Turkish by ßouЯock.
* build system: Fixed compilation if configure choses the internal versions of
  libebml and libmatroska while older versions are still installed in a
  location named with "-I..." or "-L..." in CFLAGS/CXXFLAGS/LDFLAGS or with
  configure's "--with-extra-includes" and "--with-extra-libs" options.

update to 4.5.0
many fixes and improvements, too much to list here

update to 4.3.0
changes:
-feature additions: "quiet"-Flag, more data shown by mkvinfo
-fixes
-build systems uses a ruby script "drake" rather than "make"

update to 4.2.0
changes:
-bugfixes
-enhancements to mkvmerge

update to 4.1.1
many bugfixes and improvements, too much to list here

Update mkvtoolnix to 2.9.8.

Too many upstream changes to duplicate here. Upstream change log is at
http://www.bunkus.org/videotools/mkvtoolnix/doc/ChangeLog .

Remove multimedia/mmg.  mmg is now optionally built as part of mkvtoolnix.

Support flac-1.1.3 based on a patch from
ftp.altlinux.org /pub/people/thresh
Bump PKGREVISION because this package just compiled without flac support.

Fixed "test ==".

Update to version 1.7.0

Changes:

- mkvmerge: enhancement: Added support for MIME type detection via
  libmagic (patch by Robert Millan with heavy modifications by
  myself).

- mkvmerge: bug fix: Theora headers were not handled correctly.

- mkvmerge: bug fix: The WavPack reader was broken on 64bit
  systems (e.g. AMD64).

- mkvmerge: bug fix: The Theora timecode handling was broken, and
  Ogg/Theora files were not identified correctly (they showed up as
  "unknown" in mmg).

- mmg: enhancement: The 'adjust timecodes' function accepts
  timecodes like 'XXXXXunit' with 'unit' being 'ms', 'us', 'ns' or
  's'.

- mkvmerge: enhancement: mkvmerge will no longer refuse to
  concatenate files with differing Codec Private contents and only
  issue a warning in such cases.

- mkvmerge: bug fix: Quicktime/MP4 reader: Added support for
  version 1 media headers ('mdhd' atom) with 64bit fields. Fixed the
  duration of the last packet passed downstream. Fixed overflow
  issues during re-scaling from the Quicktime/MP4's time scale to
  nano seconds used by mkvmerge.

- mkvmerge: bug fix: Muxing wasn't working Windows 9x/ME because
  mkvmerge was trying to use Unicode file access functions when
  determining which directories to create. Fixes Anthill bug #177.

- mkvmerge: new feature: Added support for the "Delay:" feature
  and for negative timecodes in VobSub IDX files.

- mmg: new feature: If mmg is set to automatically fill in the
  output file name then it will clear the output file name once all
  input files have been removed.

- mmg: bug fix: Fixed a crash that occured if the user removed an
  attachment and clicked somewhere in the empty space in the
  attachment list. Occured only on Windows.

- mmg: bug fix: Re-added Chinese to the list of popular languages
  (those are listed first in the language drop down boxes).

- mkvmerge: bug fix: The last change to the ISO 639 language
  handling broke the VobSub reader so that it reported the wrong
  language codes. This also caused mmg to not display the correct
  language after adding a VobSub file.

Update to version 1.6.5

Changes:
- new features (e.g., - splitting after arbitrary timecodes
  and muxing of USF subtitles)
- lots of bugfixes since 1.4.2
See ChangeLog within the distfile for details.

Update to version 1.4.2

Bugfix release.

Updated to version 1.4.1

Changes:

- added help file

1.4.1:
======
- bugfixes

1.4.0:
======
- support for MPEG-1 and MPEG-2 video read from PS and ES streams,
- support for AVC (aka h.264) video from MP4 files,
- support for concatenating files,
- support for the new elements needed for menus,
- support for WAVPACK4 lossless and lossy audio,
- support for extracting VobSubs and
- added an online help to mmg accessible by pressing F1

Add RMD160 digests.

Update to version 1.0.2

Changes:

- all: bug fix: Fixed compilation with the upcoming new versions
  of libebml and libmatroska.

- mkvmerge: bug fix: mkvmerge did not accept XML chapter files
  created with older mkvtoolnix versions due to deprecated chapter
  elements. Such elements are now skipped.

- mkvmerge: bug fix: Fixed negative audio displacement for a
  couple of formats.

- mmg: bug fix: Again the window handling. Hopefully this is
  better than the other attempts.

- mmg: bug fix: One was able to crash mmg by pressing 'ok' in the
  muxing dialog right after muxing finished, especially if the
  'abort' button was hit before. This mostly happened on Linux.

Change some string manipulations to equivalent operations that
gcc 2.95 understand.

Updated to version 1.0.1

Changes:
- mmg: Fixed some layout issues with wxWidgets 2.5.3 and newer.

- mmg: new feature: The window position is saved and restored when mmg is
  started the next time.

- mmg: bug fix: Fixed a crash/memory corruption showing weird characters
  in the input boxes.  This happened when the user removed a file from
  mmg while mmg was updating the command line.

- mmg: bug fix: mmg now has an icon associated with it while it is running
  instead of the generic Windows application icon (Windows only).

- mmg: bug fix: The main window is now minimized during muxing. This allows
  to hide both of the windows while muxing is running and restoring them
  later, even if they were iconized when muxing finished (Windows only).

- mmg: bug fix: Made the muxing dialog ("mkvmerge is running") modal all the
  time.  This prevents the user from hitting the main window's minimize
  button.  On Windows this makes mmg stuck in iconized mode if it was
  iconized when muxing finished.

- mkvmerge: bug fix: The first packet of an AAC track read from Real
  containers might not start at the timecode 0. This offset was ignored by
  mkvmerge.

- mkvmerge: bug fix: Fixed a buffer overflow in the UTF-8 file reading
  routines.

Update to version 1.0

Changes:
- mkvmerge: bug fix: The Matroska reader doesn't insist on having
  a default duration ( = FPS) for video tracks in the "AVI
  compatibility mode" ( = with the CodecID "V_MS/VFW/FOURCC"). This
  enables re-muxing of Matroska files created from MP4 files.

- mmg: bug fix: File names with non-ASCII characters were not
  working if mmg was compiled against a Unicode enabled wxWidgets.

- mkvmerge: new feature: Added reading DTS from AVIs and from
  Matroska files.

- mkvmerge: bug fix: A variable initialization was missing which
  very recent gcc versions (3.4.2) did not like very much. Also
  fixed a small compilation bug.

Updated to version 0.9.7

Changes:

- mkvmerge: bug fix: The handling of external timecode files was
  still not correct but should be OK now.

- mmg: Added an error message if the user selects 'mmg' as the
  'mkvmerge executable' because that would lead to an infinite
  number of 'mmg's being spawned.

- mkvmerge: bug fix: If LFE is on for DTS then the number of
  channels is one more than what the DTS frame header says.

- mkvmerge: bug fix: Timecodes for Vorbis were wrong on rare
  occasions (when reading laced Vorbis from a Matroska file and
  changing the lacing, e.g. when splitting for the second and all
  following files).

- mkvmerge/mkvinfo/mkvextract: bug fix: The chapter and tag
  element tables were not always intialized correctly depending on
  the compiler and the optimization flags used.

- mkvmerge: bug fix: The OGM reader was broken if at least one
  track was not to be copied from the file (happened between 0.9.5
  and 0.9.6).

- mmg: bug fix: After loading saved mmg settings the track input
  box listed the tracks always coming from the last input file and
  not from the one they really came from.

- mmg: enhancement: Made mmg's main window properly resizable.

- mkvmerge: Rewrote the code for the external timecode files. This
  also fixes bug 99: The durations for the individual tracks were
  not correct for those tracks for which --timecodes was used.

- mmg: bug fix: Crash when saving chapters from the chapter
  editor. Same as the mkvinfo issue below but on all OS.

- mkvinfo: bug fix: The chapter and tag element tables were not
  initialized on Windows resulting in a crash when one of those
  elements was encountered.

Updated to version 0.9.6

Changes:

- mkvextract: bug fix: The track extraction was creating the
  output file twice if the Matroska file contained a copy of the
  track headers. This resulted in the first extracted file being
  overwritten at the end of extraction.

- mmg: bug fix: If the file title is read from an input file, not
  modified by the user and that input file is removed again then the
  file title will be unset.

- mkvmerge: enhancement: Converted the raw FLAC reader to use
  another interface to the FLAC libraries. This results in a speedup
  of up to 50%. Thanks to Josh Coalson for telling me about its
  existence.

- mkvmerge: new feature: Added two warnings. One about invalid
  track IDs that were used on the command line but that don't
  correspond to an available track in a file and one if no track
  will be copied from a source file. Both warnings hint at bad
  command line arguments.

- mkvmerge: Only write the segment duration as a 64bit float if
  there is no video track present. This way users won't have to
  update their DirectShow filter/apps for most files. Only
  audio-only files need this precision anyway.

- mkvmerge: Changed the Ogg/OGM reader to use the stream number
  and not its serial number as the track ID (meaning the track IDs
  will be 0, 1, 2... etc. instead of the random numbers oggenc uses
  as the serial numbers).

- mkvmerge: new feature: The CUE sheet parser now accepts INDEX
  lines with indices from 00 up to 99 and implements the Red Book
  specification for audio CDs that way. Patch by Vegard Pettersen
  <vegard_p at broadpark adot no>.

- mkvmerge, mkvextract: bug fix: ASS was handled like SSA which is
  not correct in each case, especially when extracting it.

- mkvextract: bug fix: The WAV writer was not endian safe.

- mkvmerge: bug fix: The charset was not set correctly on Solaris.

- mkvmerge: bug fix: mkvmerge crashed when reading Matroska files
  that contain an empty tag list.

- mkvmerge: bug fix: Some Matroska files that e.g. have had their
  timecodes offset with the Matroska Stream Editor or other means
  may contain timecodes that caused mkvmerge to print a warning
  about "timecode < last_timecode". A new fix implements a
  workaround and a warning message with a proper explanation for
  this case.

- mkvmerge: bug fix: Older Matroska files containing chapters
  caused mkvmerge to abort muxing.

- mkvmerge: bug fix: mkvmerge was only copying the last tag of a
  list of tags applying to a track from a Matroska file.

- mkvmerge: bug fix: mkvmerge will show a nice warning if the
  entries in a SRT have non-continuous timestamps. It'll also sort
  the entries by their start timestamp instead of throwing the
  generic "timecode < previous timecode" warning.

- mmg: bug fix: The 'Matroska file analysis' window that occurs
  when reading chapters from a Matroska file did not disappear if it
  was minimized when the process finished.

- mkvmerge: new feature: Added a new parameter
  --aspect-ratio-factor.

- mkvinfo: bug fix: Strings from chapters and tags were shown in
  UTF-8 instead of the local charset. This bug was introduced around
  2004-08-28.

- mkvmerge: bug fix: Not all chapter elements were copied
  correctly from a source Matroska file.

- mkvextract: Sped up the extraction of attachments, chapters,
  cuesheets and tags by using the seek head information and not
  parsing the full file each time.

- mkvmerge: bug fix: The Matroska reader was not handling very big
  cluster timecodes correctly. Those can occur when the timecode
  scale factor is very small.

- mkvmerge: bug fix: Empty clusters in Matroska files no longer
  make mkvmerge think that file has been read completely.

- mkvmerge: new feature: Added support for MP2 (and maybe MP3)
  audio in MP4 containers.

- mkvmerge: new feature: The chapter and tag parsers accept XML
  element attributes instead of sub-elements for those sub-elements
  that only contain data. Example for a "simple tag":
  <Simple Name="ARTIST" String="Tori Amos"/>

- mkvmerge: bug fix: The automatic MIME type detection based on
  the file name extension was using the file name extension as the
  MIME type.

- mkvmerge, mkvinfo: new feature: Added the four new PixelCrop
  elements.

- mkvmerge, mkvextract, mkvinfo: new feature: Added
  'TargetTypeValue' as a supported tagging element.

- mkvmerge, mkvextract, mkvinfo: Complete rewrite of the chapter
  and tag parsing and output functions. Additions will be much
  easier now.

- mkvmerge, mkvextract, mkvinfo: feature removed: Dropped support
  for the very old and deprecated tagging system. No one used it
  anyway.

- mkvmerge: new feature: Allow the use of two-letter ISO639-1
  country codes in for the '--language' parameter. Those will be
  converted to the corresponding ISO639-2 language code
  automatically.

- mkvmerge, mkvinfo, mkvextract: new feature: Added support for
  the 'TargetType' tag element

- mkvmerge: bug fix: The MP3 handling was broken on weird and rare
  occasions when reading MP3 from a Matroska file.

- mkvmerge: bug fix: Removed a bogus warning about an attachment's
  MIME type having been given more than once.

Update to version 0.9.5.

Changes:

- mkvmerge
  bug fix: WAV files which contained a 'PAD ' chunk before the
           'data' chunk were not processed at all.
  bug fix: Use 'setjmp' and 'longjmp' Instead of throwing a C++
           exception during the chapter parsing stage. Otherwise
           libexpat will abort with a non-descriptive error
           message on Windows.
  bug fix: SSA/ASS subs with the old codec ID 'S_SSA' and 'S_ASS'
           were accepted, but their codec ID was kept. It is now
           correctly changed to 'S_TEXT/SSA' and 'S_TEXT/ASS'.
  bug fix: Try to guess whether tags read from OGM files (for
           automatic language tag setting and for copying chapter
           information) are already in UTF-8 or not. If not try
           to convert them from the current system's charset.
  bug fix: use the same UID for the EditionUID in the chapters
           and in the tag targets when parsing a CUE sheet.
  bug fix: Handle TTA files with ID3 tags correctly (=skip the ID3
           tags).
  bug fix: There was an illegal free() in the OGM reader.
  bug fix: Block durations with 0s length (e.g. entries in a SSA
           file) were not written.
  bug fix: The FLAC packetizer gets the duration from the FLAC
           packet itself.
  bug fix: The word 'TAG' occuring in e.g. SRT subs caused the
           ID3/MP3 frame detection to be stuck n an endless loop.
  new feature: Abort muxing if the output file name is the same as
           the name of one of the input files.
  new feature: If there was no MIME type given for an attachment
           then mkvmerge will try to guess it based on the file's
           extension just like mmg.
  new feature: Implemented sample-precision for timestamps and
           durations on audio only files.
  added: 'EditionUID' to valid elements below '<Targets>' in XML
           tags. Fixed the creation of the 'Targets' with
           --global-tags and --tags.

- mkvextract
  bug fix: The CUE extraction wrote UTF-8 characters but no UTF-8
           BOM (byte order marker) at the beginning.
  bug fix: The subtitle track extraction used the wrong duration
           in 0.9.4.
  new feature: Limited support for extracting chapters as CUE sheets
           that haven't been created by using a CUE sheet with
           mkvmerge's "--chapters" option.

- mkvmerge, mkvinfo, mkvextract
  new feature: added support for the new tag elements ('tag language'
           and 'default/original language').
  new feature: Added support for the new 'EditionFlagHidden',
           'EditionFlagDefault' and 'EditionManaged' elements.

- mkvmerge, mkvextract, mmg
           Changes to the chapter handling.
           EditionUIDs are always created. mkvextract outputs
           EditionUIDs and ChapterUIDs normally. mkvmerge tries
           to keep EditionUIDs and ChapterUIDs but replaces them
           if they aren't unique.

- mkvmerge/mkvextract
  new feature: Use the new EditionUID entries when convert CUE sheets
           to chapters and tracks. This is in preparation for
           'multiple CDs to single Matroska file' conversions.

- mkvinfo, mmg
  bug fix: Fixed compilation with Unicode enabled versions of wxWidgets.

- mmg
  bug fix: The 'down' button on the 'input' tab was not working
           correctly in all cases.

Updated to version 0.9.4.

Changes:

- patch-ab no longer needed

0.9.4:
======
- mkvextract: new feature: Added support for extracting TTA tracks
                     to TTA files.
              new feature: Implemented the extraction of chapter
                     information and tags as a CUE sheet which is
                     the reverse operation to using a CUE sheet
                     with mkvmerge's '--chapters' parameter.

- mkvmerge: bug fix: SRT file recognition failed if the file
                     contained spaces at the end of the first line.
            bug fix: Broken VobSub .idx files which contain
                     timestamps going backwards no longer crash
                     mkvmerge. A warning will be printed for such
                     inconsistencies.
            bug fix: The Matroska reader contained a nice little
                     illegal memory access (introduced in 0.9.3 with
                     the fixes to the 'default track' handling).
            bug fix: The SSA reader was segfaulting if a line
                     contained an empty text field.
            bug fix: The CUE sheet parser interpreted a timestamp
                     as HH:MM:SS (hours, minutes, seconds). The
                     correct spec is HH:MM:FF (hours, minutes,
                     frames with 1 frame = 1/75 second).
            new feature: The pregap from a CUE sheet is converted
                     into two sub-chapters (one for "INDEX 00", one
                     for "INDEX 01"). These sub-chapters have their
                     'hidden' flag set.

- mkvinfo: bug fix: Fixed compilation for MATROSKA_VERSION = 2.
           bug fix: Fixed compilation with gcc 3.2.

- mmg: new feature: Added support for the two flags 'hidden' and
                    'enabled' in the chapter editor.

Fix invalid use of preprocessing directive within macro arguments,
to make this compile when using gcc 2.95.

Updated to version 0.9.3.

Changes:

- add patch to fix compilation when MATROSKA_VERSION is set to 2 or bigger.
  Patch sent to Moritz Bunkus and it's fixed in svn repo.

- take MAINTAINERSHIP

0.9.3:
======
- mmg: bug fix: The 'default track' checkbox was broken.

- mkvmerge: bug fix: Using '--cues ...:all' was broken for audio tracks
                     that use lacing.
            bug fix: The latest OpenDML AVI files generated by mencoder
                     were not read correctly. Only the first RIFF chunk
                     was processed.
	    bug fix: The default track feature did not work correctly
                     with the new --track-order.
            new feature: When using a CUE sheet as a chapter file
                     mkvmerge will automatically convert some of the
                     entries to tags.
            new feature: Added support for TTA lossless audio files.

            If the user does not specify a --language for a track 'und'
            ('undefined') will now be used instead of 'eng'. The user
            can use the new option '--default-language' to change that.

Updated to version 0.9.2.

Changes:
========
- mkvextract: bug fix: Video extraction was not working correctly
  on big endian systems.
- mkvmerge, mmg: new feature: --track-order now controls the track
  creation order globally, meaning that it isn't used for each file
  but only once. This allows the tracks to be created in ANY order
  (before it was first ordered by file, then by track). For mmg this
  means that the track list contains all available tracks and that
  there are no 'up' and 'down' buttons in the file list anymore.
- mkvmerge: new feature: You can specifiy the time after which to
  split with ms precision.
- mkvmerge: bug fix: Fixed more of that 'garbage at the beginning
  of MP3 streams' issue.
- mkvmerge: bug fix: Reading of broken / unfinished AVI files was
  broken on Windows.

- mmg: Updated the mkvmerge GUI guide to reflect changes and
  additions.
- mmg: new feature: Added 'minimize' buttons to the two 'mkvmerge
  is running' dialogs.
- mmg: new feature: Added an option for automatically calling
  'File -> new' after a job has been added to the job queue.
- mmg: bug fix: The job manager did not always catch all of
  mkvmerge's output, especially if a job failed.
- mmg: new feature: Line wrap the tooltips on Windows.
- mmg: new feature: Suggest a name for a new job based on the
  output file name.
- mmg: new feature: Temporarily disaable 'always on top' if the
  muxing or the job dialog are visible.
- mmg: new feature: Ask for confirmation before adding a job if
  there's already an old job with the same description.
- mmg: bug fix: The functions 'move up', 'move down' and 'delete'
  in the 'job' dialog were not working correctly on Windows.
- mmg: bug fix: The 'always on top' option was ignored when
  starting mmg.

Updated to version 0.9.1.

Changes:

- mkvmerge: Dropped supoprt for 'aviclasses' (one of the two
            libraries for accessing AVI files). This mostly
            affects the Windows users as I've used aviclasses
            and not avilib on Windows so far. The 0.9.0-pre-builds
            so far haven't shown any problems, though, so I hope
            this doesn't break anything.
  new feature: mmg will set the 'display dimensions' automatically
           for AVI files whose video track is MPEG4 and has the
           pixel aspect ratio stored in the bitstream.
  bug fix: The improved MP3 garbage detection was broken resulting
           in an error message from mkvmerge in some weird
  bug fix: Matroska tracks can use lacing (several frames inside
           one Matroska block with only one timecode for the whole
           block). mkvmerge did not recreate the timecodes for the
           frames 1..n in the lacing correctly.
  feature removed: Dropped support for 'time slices'. They were not
           used, didn't offer the player any additional value and
           caused massive increase in overhead.
  bug fix: The OGM fix in 0.9.0 broke handling for non-broken OGM
           files a bit.
  new feature: Added support for the audio/video synchronization
           method used by NanDub (garbage at the beginning of audio
           tracks inside an AVI) for AC3 and MPEG audio tracks. In
           other words: If an AVI is read and an audio track contains
           garbage right at the beginning then the corresponding
           audio delay is calculated and used instead of simply
           discarding the garbage.
  new feature: Enabled reading MPEG4 video from MP4 files (nope,
           they're not stored in Matroska's native mode yet).

- mmg
  bug fix: The job manager did not handle the conversion of non-ASCII
           characters correctly.
  new feature: The action 'delete job' in the job manager will also
           delete the file in the 'jobs' subdirectory.
  new feature: Added an option to make mmg stay always on top (only
           on Windows).
  new feature: Added a dialog for adding arbitrary command line options
           which includes a list of advanced options to chose from.

Updated to version 0.9.0.

Changes:

- mkvmerge
  bug fix: Improved handling for OGM files. Streams that
           are lacking the comment packet are handled better.
  bug fix: Some MP3 streams are padded in the front with trash
           (mostly those in AVI files). This trash might contain
           valid MP3 headers which do not match the remaining headers
           for the actual track. Both the MP3 reader and the MP3
           packetizer can now skip up to one of those bogus headers
           in the trash.
  bug fix: The OGM reader was not Endian safe.
  bug fix: Audio sync for Vorbis was partially broken for positive
           offsets.
  Rewrite of the VobSub handling code.

- mmg
  bug fix: On some occasions the chapter editor thought there was no
           language associated with a chapter name and complained
	   about that.
  bug fix: The chapter editor did not honor the values selected for
           'country' and 'language'.
  Removed the 'advanced' tab. Those options shouldn't be used anyway.

Updated to version 0.8.9.

Changes:

- explicitly disable wxWindows support
- mark it as using c++
- prepare for mmg import
- delint

0.8.9:
======
- mmg: new feature: mmg will ask for confirmation before overwriting
       a file. This can be turned off on the settings tab.
- mmg: new feature: Implement drag'n'drop of files onto the input,
       attachment and chapter tabs. For the input and attachment tabs
       it works like pressing the 'add' button. On the chapters tab it
       works like calling 'Chapter Editor -> Open'.
- mkvinfo/mmg: Enabled compilation with wxWidgets 2.5 and Unicode
       enabled builds of wxWidgets.
- all: Increased the precision for timecodes in chapter files to
       nanoseconds (optionally, you can still use fewer digits after
       the '.').
- mkvmerge: Fixes for compilation with gcc 3.4.
- mkvmerge: bug fix: Some strings read from RealMedia files were not
       zero-terminated resulting in broken track recognition for some
       files.

Updated to version 0.8.8.

Changes:

0.8.8:
======
- mkvtoolnix now depends on libebml 0.7.0 and libmatroska 0.7.0.
- mkvinfo: bug fix: mkvinfo was forcing libmatroska not to handle
	   unknown elements and crashed on those.
- mmg: new feature: When adding Matroska files the video track's
       display dimensions are displayed as well.
- mmg: bug fix: On non-Windows systems some combinations of wxWindows
       and GTK caused continuous 100% CPU usage after a special call
       to wxExecute.
- mkvmerge: new feature: Implemented reading AAC from AVIs.
- mkvmerge: bug fix: The Flac packetizer was accessing uninitialized
            memory resulting in a crash on Windows.
- mkvemrge: bug fix: Fixed the handling of RealMedia files with 'multirate'
            tracks (again).
- mkvmerge: bug fix: On some rare occasions chapters were not written
            correctly when splitting was active.
- avilib: bug fix: Fixed compilation on big endian systems.

0.8.7:
======
- mkvinfo: new feature: Added a terse output format via '-s'.
- mkvmerge: new feature: If using MPEG4 video and no aspect ratio or display
            dimensions are given mkvmerge will extract the aspect ratio
            information from the stream and automatically set the display
            dimensions accordingly.
- mkvmerge: bug fix: Using audio sync on AC3 tracks read from Matroska files
            did not work.
- mkvextract: new feature: Added extraction of RealAudio and RealVideo tracks
              to RealMedia files.
- mmg: new feature: Added a 'job queue'. The current settings can be added as
       a new job, and all pending jobs can be started for batch processing
       without user interaction.

Initial import of mkvtoolnix-0.8.6: Set of tools to create, alter and inspect
Matroska files.

MKVtoolnix is a set of tools to create, alter and inspect Matroska files.

With these tools one can get information about (mkvinfo) Matroska files,
extract tracks/data from (mkvextract) Matroska files and create (mkvmerge)
Matroska files from other media files. 

From pkgsrc-wip, created by Sergey Svishchev with modifications by me.

Initial revision