MKVToolNix v27.0.0 released


I’ve just released MKVToolNix v27.0.0. This release is smallish but important due to two bug fixes. The first is an annoying crash easily triggered on Windows simply by using the program for a while. The second is indubitably more important: mkvmerge was corrupting E-AC-3 frames when the “dialog normalization gain removal” functionality was used.

You can download the source code or one of the binaries. The Windows and macOS binaries as well as the Linux AppImage are available already. The other Linux binaries are stil being built and will be available of the course of the next couple of hours.

Here are the NEWS since the previous release:

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. Part of the implementation of #2358.
  • MKVToolNix GUI: multiplexer: adjusted & added controls for mkvmerge’s new
    feature of being able to adjust chapter timestamps. Part of the
    implementation of #2358.
  • 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. Implements

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. Fixes #2386.
  • MKVToolNix GUI: fixed a leak of Windows font resources leading to a general
    slowdown and subsequent crash. Fixes #2372.

Have fun :)

6 thoughts on “MKVToolNix v27.0.0 released

  1. TNTI

    Can you add MP4 reader before the next release: add support for VP9?
    I haven’t tried opus and flac in mp4, maybe you can try it.

  2. TNTI

    I just tested it.
    The MP4 reader in MKVToolNix does not support FLAC and OPUS, and the Vorbis support is incomplete.

  3. calen

    Maybe it’s just me… but the download links point to “” which is unrecognized by my DNS services. Suggestions?

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