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

MKVToolNix (64-bit)
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MKVToolNix 56.1.0 (64-bit)

  -  19.65 MB  -  Open Source
Free Download

Security Status

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 56.1.0 (64-bit).


For those interested in downloading the most recent release of MKVToolNix (64-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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Download MKVToolNix 56.1.0 (64-bit)
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  • MKVToolNix 56.1.0 (64-bit) Screenshots

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    MKVToolNix 56.1.0 (64-bit) Screenshot 1
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  • MKVToolNix 56.1.0 (64-bit) Screenshot 3

What's new in this version:

New features and enhancements:
- mkvmerge: AAC: added support for LOAS/LATM files with channel configuration indexes 9–21 (e.g. channel count 22.2 for index 13) according to Rec. ITU-R BS.1196-7 & ISO/IEC 23008-3:2019.

Fixed:
- mkvmerge: HEVC/H.265 parser: fixed invalid memory access that could happen when reading certain types of HEVC data (e.g. with changing parameter sets mid-stream) from certain containers (e.g. Matroska). This bug was introduced in release 56.0.0
- mkvextract: AAC: mkvextract will now abort with an useful error message when the user tries to extract a track whose 'audio-specific config' element in`CodecPrivate` signals a number of channels of 7 or greater than 8 as that isn't supported by the ADTS format.

Build system changes:
- configure: the `--enable-ubsan` option hasn't actually enabled anything since release 39.0.0

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