I use Plex as my back-end video serving platform. I’d love to switch to Jellyfin but not everything in the house has a Jellyfin client and I don’t want to use a mish-mash of multiple platforms because that just makes support a nightmare.
Anyhow, the other day I was watching Manhunter and it kept buffering. The TV in the back room is an old LG TV (LG 60UF850V-ZB). I know from past experience LG don’t seem to support DTS-HD MA 5.1 audio streams but, generally, I’ve not found any issues with DTS 5.1 streams. In the case of Manhunter though the stream kept buffering for no obviously good reason.
Looking at the activity in Plex I could see it was transcoding but it wasn’t making any sense as to why:
Taking a wild punt on the path of least effort, changing the audio to PCM seemed to fix the problem. and Manhunter played out just fine afterwards, no buffering or anything.