MKVToolNix 81.0 – Create, alter, and inspect Matroska (mkv) files.

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

Since May 1st 2003, the Matroska libraries themselves and my Matroska tools are officially released as a first public beta version. Although all of them are still under heavy development, I urge you to download the software, test it and report any errors you encounter to me. I’m always grateful for good bug reports because I miss so many mistakes and you guys normally find them. Your feedback is important to me 🙂

Note: While the software is classified as free, it is actually donationware. Please consider making a donation to help support development.

Bug fixes

mkvmerge: when the user requests processing be stopped after the video ends `mkvmerge` will now take appending files into account properly. It won’t stop processing unconditionally after the first file ends anymore. Fixes #3618.
mkvmerge: AV1 handling in readers: the readers will now provide the pixel dimensions to the AV1 packetizer as early as possible, just like for other video packetizers. That way the pixel dimensions are available for calculating the display dimensions when command-line options such as `–aspect-ratio` & `–aspect-ratio-factor` are used. Before the change the calculation was done based on initial pixel dimension values of 0x0, resulting in display dimensions of 0x0, too. Fixes #3611.
mkvmerge: HEVC/H.265 packetizer: when reading & appending HEVC/H.265 from Matroska, MP4/MOV or FLV files the first frame of all the appended files was sometimes dropped, resulting in broken video at the point where video is appended. Fixes #3479.

Full list of changes available here

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