mkvtoolnix-gui(1) on Linux
The text 3770585b3db7, as Debian 10 (Buster) shipped it.
a GUI for mkvmerge(1) including a chapter and a header editor
Flags it lists
-
--edit-chapters -
--edit-headers -
--help -
--info -
--merge -
--version -
-V -
-h