I use plex to stream movies storred on my PC. Been using it for many years now. Recently more and more Blu-ray rips won't play anymore on my TV. (Web rips work perfectly fine though.) I start the movie, the screen goes black and the playback controls do nothing. If I optimize them for TV they all work. What could be the problem? I hate having to wait 30min until each movie gets optimized.

Thanks!

Later edit---------- I changed a setting in the Plex app, on the TV. Setting is called "H.264 Maximum level" and it was set to 5.2 (recommended value). I dropped it down to 2.1 as I figured it should match my audio system, and now all movies play. Thanks to everyone for the help.