MKVToolnix

MKVToolnix is a set of tools to create, alter and inspect Matroska files under Linux, other Unices and Windows. They do for Matroska what the OGMtools do for the OGM format and then some.

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. Matroska is a new multimedia file format aiming to become THE new container format for the future.

• Release Date: Mar 19, 2025
• Download(s):
  mkvtoolnix-32-bit-91.0-setup.exe
  mkvtoolnix-32-bit-91.0.7z
  mkvtoolnix-64-bit-91.0-setup.exe
  mkvtoolnix-64-bit-91.0.7z
  MKVToolNix-91.0.dmg
  MKVToolNix_GUI-91.0-x86_64.AppImage
• # 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](https://codeberg.org/mbunkus/mkvtoolnix).
  * The customized MXE repository used for building the Windows variants has
    been moved from Gitlab to [Codeberg](https://codeberg.org/mbunkus/mxe).
  
  
  ## 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
  
  
  * The bundled `nlohmann-json` library was updated to v3.11.3.