ignore playlists meant for menus
This is on behalf of @FCrane who wrote in #3657 (closed):
One other issue (I've wanted to report since ages): after scanning all playlists (BluRay and UHD BluRay), mkvmerge shows a list of all found playlists. It can filter out those which are too short, but there almost always are many "long" playlists that contain just 1 m2ts many times - probably some loops of short videos for menus, etc. It should be possible to filter these out, too, because when looking for the main movie, a playlist that contains the same m2ts more than once can never be valid! I often encounter situations with dozens of playlists, many of them longer than the main feature, but all bogus due to what I just described. If possible, please add an option to filter out these bogus playlists...