Download MKVToolNix 27.0.0

Moritz Bunkus has released version 27 of MKVToolNix. This collection of open source programs allows viewing, editing, and conversion of matroska files. For example, sound tracks and subtitles can be added, removed or set as default. MKVToolNix is ​​a collection of separate command line tools, but a graphical user interface is also included. Downloads are available for Windows, various Linux distributions, and macOS. The changelog for this release looks like this:

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.

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. implementations
  #2380†

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
  slow down and subsequent crash. Fixes #2372†