Read a comma-separated flag that may also be repeated.
concat --file a.mp4 --file b.mp4 and concat --file a.mp4,b.mp4 both yield ['a.mp4', 'b.mp4'], which is what a user expects from either spelling.
concat --file a.mp4 --file b.mp4
concat --file a.mp4,b.mp4
['a.mp4', 'b.mp4']
Read a comma-separated flag that may also be repeated.
concat --file a.mp4 --file b.mp4andconcat --file a.mp4,b.mp4both yield['a.mp4', 'b.mp4'], which is what a user expects from either spelling.