mkvmerge(1). It offers easy access to all of
mkvmerge(1)'s options. All settings (e.g. source files, track options etc) can be saved and restored. Included is a chapter editor that can read
style chapter files, write
style chapter files and even read chapters from
files and write chapters directly to
files. Included is also a header editor that can be used to quickly change properties of existing
files without needing a complete remux.
knows few options. The first possibility is to start it with a single file name. If that file name's extenion is '.mmg' then it will be treated as a preferences file and
will load its setting when it starts. Otherwise the name is interpreted as being the name of an input file which will be added.
The second operation mode is invoked with the option
and a file name. This lets
run its header editor and load the file.
The full documentation is available in HTML form (doc/mkvmerge-gui.html).