Download MKVToolnix 76.0.0

Moritz Bunkus has released version 76 of MKVToolNix. This open source program allows viewing, editing and converting matroska files. Sound tracks and subtitles can be added, removed or set as default. MKVToolNix is ​​a collection of separate commandline tools, but a graphical user interface is also included. Downloads are available for Windows, macOS and various Linux distributions. The following changes and improvements have been made in this release:

MKVToolNix v76.0 released

This is a slightly bigger one in terms of the number of fixed bugs & implemented improvements. Due to the change wrt. the handling of BlockAddition elements (which is required for HDR content for WebM, VP9, ​​AV1`) I strongly recommend users to upgrade.

Important notes

• mkvmerge: removed the option –blockadd. Removing block additional data is not possible anymore, as it is often required for proper decoding. Part of the implementation of #3511.

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. See #3510.
• 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. Part of the implementation of #3511.
• 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. Part of the implementation of #3511.
• 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. Part of the implementation of #3475.
• 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. Part of the implementation of #3475.
• 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. Part of the implementation #3506.
• 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. Fixes #3264 and likely others.
• 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. Implements #3512.
• 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. Implements #3513 & others.
• 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. Fixes #3508.
• 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. Fixes #3484.
• mkvmerge: Matroska reader: when reading files that use block additions with IDs other than 1 (eg 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. Part of the implementation of #3511.
• 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. Part of the implementation of #3511.
• mkvpropedit: fixed replacing chapters & tags in files that don’t contain tracks. Fixes #3498.