I have some files that have multiple audio tracks and several subtitle tracks, all of which are marked default. I’d like to remove the default from all the subtitle tracks and all-but-one of the audio tracks (and possibly move the audio track to be the first track). How would I do that?
mkvtoolnix is the best tool for this stuff. iirc ffmpeg has some limitations in this area
Okay, looks like you can do it in ffmpeg, but you have to map every audio stream individually in the command to rearrange them.