Create, modify and inspect Matroska (MKV) files for Windows PC

MKVToolNix (32-bit)

MKVToolNix 42.0.0 (32-bit)

  -  16.87 MB  -  Open Source

Sometimes latest versions of the software can cause issues when installed on older devices or devices running an older version of the operating system.

Software makers usually fix these issues but it can take them some time. What you can do in the meantime is to download and install an older version of MKVToolNix 42.0.0 (32-bit).


For those interested in downloading the most recent release of MKVToolNix (32-bit) or reading our review, simply click here.


All old versions distributed on our website are completely virus-free and available for download at no cost.


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  • MKVToolNix 42.0.0 (32-bit) Screenshots

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    MKVToolNix 42.0.0 (32-bit) Screenshot 1
  • MKVToolNix 42.0.0 (32-bit) Screenshot 2
  • MKVToolNix 42.0.0 (32-bit) Screenshot 3

What's new in this version:

New features and enhancements:
mkvmerge: added an option for creating byte-identical files:
- `--deterministic <seed>`
- mkvmerge: Matroska reader: mkvmerge will remove the `icpf` atom headers if they're present in frames read from Matroska files
- mkvmerge: MP4 reader: ALAC tracks: the number of channels, sampling frequency and bit depth are now taken from the bitstream in order to fix
bogus values on the container level
- mkvpropedit: when changing track UIDs the referring elements in existing chapters & tags will be updated automatically, too
- mkvinfo: when the option `-p`/`--hex-positions` is used, element positions will be output regardless of the verbosity level
- mkvinfo: added the option `-P`/`--positions` for showing the position of each element in decimal regardless of the verbosity level used
- mkvinfo: added the option `-o`/`--continue` for continuing processing when the first cluster is encountered regardless of the verbosity level used
- mkvinfo: added the option `-a`/`--all` for outputting all sub-elements (even cues & seek head entries) and not stopping at the first cluster regardless
of the verbosity level used
- MKVToolNix GUI: multiplexer: added an option in the preferences for disabling adding cover images from Blu-ray discs
- MKVToolNix GUI: multiplexer: added mkvmerge's new `--deterministic` option in the "additional command-line options" dialog
- MKVToolNix GUI: header editor:: when changing track UIDs the referring elements in existing chapters & tags will be updated automatically, too

Bug fixes:
- mkvmerge: HEVC ES parser: fixed a bug in the slice parser calculating the size of a field which in turn could have led to the slice's type being read wrong. Patch by Torsten Hauska
- mkvmerge: Matroska reader: fixed a segmentation fault when trying to read a file that uses header removal compression but no removed bytes are present in the track headers
- mkvmerge: MPEG elementary stream parser: fixed an invalid memory access and use of uninitialized memory that could happen under certain circumstances
- mkvmerge: RealMedia reader: fixed a division by zero when all audio timestamps were zero
- mkvmerge: RealMedia reader: fixed an invalid memory access in the video frame assembly code triggered by invalid data in the file

Build system changes:
- `std::optional` (C++17 feature) is now used instead of `boost::optional`
- `std::regex` is now used instead of `boost::regex`

Other changes:
- New man page translations into French, Italian, Russian and Chinese Traditional have been added