MKVToolNix v91.0 released

2025-03-16 — mosu

Helloooooo!

The new MKVToolNix is out, with a lot of enhancements in MKVToolNix GUI & several bug fixes in the other parts.

You can download the source code or one of the packages. The Windows packages as well as the Linux AppImage are available already. The other Linux packages & the macOS disk image are still being built and will be available over the course of the next couple of hours.

Here are the NEWS since the previous release:

Version 91.0 “Signs” 2025-03-16

Important notes

The MKVToolNix project’s source code repository, bug tracker and wiki have been moved to Codeberg.
The customized MXE repository used for building the Windows variants has been moved from Gitlab to Codeberg.

New features and enhancements

MKVToolNix GUI: multiplexer: added actions in the “Multiplexer” menu for saving all currently open multiplexer tabs to a single .mtxcfg file. Loading this file later will restore all tabs. Implements #3797.
MKVToolNix GUI: multiplexer: when adding files the GUI can automatically enable the “commentary” flag for audio and subtitle tracks if the file name contains the word “comments” or “commentary” delimited by certain characters (configurable). This feature is turned on by default. Part of the implementation of #3798.
MKVToolNix GUI: multiplexer: when adding files the GUI can automatically enable the “original language” flag for audio and subtitle tracks if the track’s language matches one configured by the user (configurable). This feature is turned off by default. Part of the implementation of #3798.
MKVToolNix GUI: multiplexer: when adding files the GUI can automatically set several track flags based on the file name. It can now look for the same patters in the track names, too (configurable). This feature is turned on by default. Part of the implementation of #3798.
MKVToolNix GUI: multiplexer: added special drag & drop zones where users can drop files to circumvent the preferences wrt. what to do with multiple dropped files. Each drop zone corresponds to one of the three possible choices (add all to current settings; create one new settings & add all there; add new settings for each file & add one file to each). This feature is turned off by default. Implements #3796.
MKVToolNix GUI: multiplexer: added additional special drag & drop zones where users can drop files to add them as attachments. One of the zones will automatically set up the dropped file to function as a cover image. Implements #3794.
MKVToolNix GUI: multiplexer: when making destination file names unique by suffixing them with a running number the GUI will now also consider the destination file names of multiplex jobs currently in the queue that are currently running or still waiting for execution. Implements #3801.

Bug fixes

mkvmerge: timestamps format v3: fixed the parser; it was completely broken for the lines containing the duration & an optional number of frames per second. Fixes #2285.
mkvmerge: DTS parser: if the X96 extension is present in a DTS-HD High Resolution stream, the sampling frequency will be set to 96kHz. This was broken when reading DTS from elementary streams & from Matroska files. Fixes #3288.
mkvpropedit, MKVToolNix GUI’s chapter & header editors: fixed a bug leading to a segmentation fault when trying to replace an element at the end of the file that’s followed by only void elements (at least one). Fixes #3802.

Build system changes