Quoting myself here:
Quote:
Originally Posted by Mosu
2009-08-16 Moritz Bunkus <moritz@bunkus.org>
* Added a new program 'mkvpropedit' that can modify certain properties of existing Matroska files. It is mmg's header editor, just for the command line.
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That program is part of all binary packages (Linux, Windows) and will be compiled if you compile mkvtoolnix yourself without the need for further configuration/special options.