Moritz Bunkus heeft versie 28 van MKVToolNix uitgebracht. Met deze verzameling opensourceprogramma's kunnen matroska-bestanden worden bekeken, bewerkt en geconverteerd. Zo kunnen geluidssporen en ondertiteling worden toegevoegd, verwijderd of juist als standaard worden ingesteld. MKVToolNix is een verzameling afzonderlijke commandline-tools, maar er wordt ook een grafische gebruikersinterface meegeleverd. Downloads zijn beschikbaar voor Windows, diverse Linux-distributies en macOS. De changelog voor deze uitgave ziet er als volgt uit:
New features and enhancementsBug fixes
- mkvmerge: AV1 parser: updated the code for the finalized AV1 bitstream specification. Part of the implementation of #2261.
- mkvmerge: AV1 packetizer: updated the code for the finalized AV1-in-Matroska & WebM mapping specification. Part of the implementation of #2261.
- mkvmerge: AV1 support: the
--engage enable_av1option has been removed again. Part of the implementation of #2261.- mkvmerge: MP4 reader: added support for AV1. Part of the implementation of #2261.
- mkvmerge: DTS: implemented dialog normalization gain removal for extension substreams. Implements #2377.
- mkvmerge, mkvextract: simple text subtitles: added a workaround for simple text subtitle tracks that don’t contain a duration. Implements #2397.
- mkvextract: added support for extracting AV1 to IVF. Part of the implementation of #2261.
- 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. Implements #2379.
- MKVToolNix GUI: automatic scaling for high DPI displays is activated if the GUI is compiled with Qt ≥ 5.6.0. Fixes #1996 and #2383.
- 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. Implements #2230.
- mkvmerge: JSON identification: fixed a bug when removing invalid UTF-8 data from strings before they’re output as JSON. Fixes #2398.
- mkvmerge: MP4/QuickTime reader: fixed handling of PCM audio with FourCC
in24. Fixes #2391.- 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. Fixes #2393.
- 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. Fixes #2406.
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