Background:
Started backing up my Bluray collection. Used MKV->Handbrake, with Full Profile, 3 audio streams, and a subtitle stream, and using H.264 as MP4 (.m4v).
Files loaded on Synology NAS running Plex Media Server.
Client is an Apple TV.
Issue:
Some movies, while encoded the same as others, are not being played by Plex on Apple TV. When I select the file and give the play command on the Apple TV, the 'rotating' pinwheel happens for a good 10 seconds, and then the screen goes back to Plex showing the title, and extras below, with the Refresh (3/4 circle arrow) appearing.
I cannot discern from the logs what the issue is.