Package mkvtoolnix

Matroska container manipulation utilities

https://mkvtoolnix.download/

Mkvtoolnix is a set of utilities to mux and demux audio, video and subtitle
streams into and from Matroska containers.

General Commands
Command Description
mkvextract extract tracks from Matroska(TM) files into other files
mkvmerge Merge multimedia streams into a Matroska(TM) file
mkvpropedit Modify properties of existing Matroska(TM) files without a complete remux