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MKVToolNix is the canonical tool for Matroska work: mux video, audio, and subtitle tracks into MKV, set default/forced flags, edit chapters and tags, split by size or time — all lossless container operations. Anyone managing a media library or fixing subtitle timing offsets ends up needing it, and the GUI makes batch jobs painless.
It only speaks containers: no transcoding (HandBrake’s job), no playback, and MP4 output isn’t supported — it’s MKV-in, MKV-out by design. The interface is utilitarian and assumes you know what a track and a codec are. Within its lane, though, it’s essentially without competition on any OS.
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Submit a reportNo reports yet. Switched from the Windows version? Yours would be the first — and the most useful.