hi,
the mmg command, which gave a graphic mode, isappeared with the version 9.3.1-0
the --gui-mode doesn't give a graphic mode
unrecognized option --gui-mode
Re: unrecognized option --gui-mode
mmg is not part of MakeMKV. You'd have to ask about that on the MKVtoolnix site.
MakeMKV Frequently Asked Questions
How to aid in finding the answer to your problem: Activating Debug Logging
How to aid in finding the answer to your problem: Activating Debug Logging