As discussed in the following thread, I would like Plex to support automatically selecting forced tx3g subtitle tracks in MP4s as they are in MKVs.
https://forums.plex.tv/topic/132132-forced-subtitles-in-mp4-vs-mkv/
I would like Plex to automatically select the forced subtitle track in MP4s like they are in MKVs. MP4s do support forced subtitle tracks if they are tx3g format. Using a program like Subler, you can set which track is forced. I've verified this with many of my MP4s and this functionality works correctly in VLC and QuickTime (they automatically select the forced subtitle track) but for some reason not in Plex. Plex does show the forced subtitle track in the list of subtitles but you have to manually select the forced track, unlike MKVs where the track is selected automatically. While it's easy to manually select a track, if one doesn't know a movie has a forced subtitle track, it can be disruptive to the movie experience.
