I've setup jellyfin on my media server but I barely use it because the web player bugs make it unusable for me. I think most issues are due to the fact my hardware is underpowered for the task, and the player gets confused when the server replies come slow and not in the same order as they were requested. In practice subtitles go out of sync regularly, I get "codec not supported by browser" messages with the actual video playing fine behind it when seeking and frequently enough to make watching videos too annoying to bother.
There are also other annoyances like the player forgetting my subtitle selection when jumping to the next video of the same season of a show.
There's also no quality setting that is just "stream the source file directly". It seems to always want to transcode when embedding subtitles, which I guess is done by ffmpeg on the server but is really the player's job.
I know they're working on a new player, though it's not included in jellyfin yet.
There are also other annoyances like the player forgetting my subtitle selection when jumping to the next video of the same season of a show.
There's also no quality setting that is just "stream the source file directly". It seems to always want to transcode when embedding subtitles, which I guess is done by ffmpeg on the server but is really the player's job.
I know they're working on a new player, though it's not included in jellyfin yet.