I had some issues with Jellyfin that weren't due to transcoding, still not sure what the cause was.
I had a 2nd gen chromecast that would play half a second and fail, something to do with the data format I think as there was some shenanigans with changing the media container but no real transcoding happening. Solved by getting a newer chromecast which was a nice upgrade anyway.
I also had problems playing on my phone, the integrated player in the app would play video fine while the UI was interacted with, so tapping continuously worked. The picture would freeze up though. Playing through the web UI on the phone worked fine, but I prefer the app. Changing the media player from the integrated to externally through VLC solved that.
So I've found it a bit rough in some cases for me, but there are a ton of Jellyfin apps with nice UI. The core work (transcoding etc) is done by ffmpeg by all the big players (plex, emby, jellyfin) so don't expect much differentiation there.
I had a 2nd gen chromecast that would play half a second and fail, something to do with the data format I think as there was some shenanigans with changing the media container but no real transcoding happening. Solved by getting a newer chromecast which was a nice upgrade anyway.
I also had problems playing on my phone, the integrated player in the app would play video fine while the UI was interacted with, so tapping continuously worked. The picture would freeze up though. Playing through the web UI on the phone worked fine, but I prefer the app. Changing the media player from the integrated to externally through VLC solved that.
So I've found it a bit rough in some cases for me, but there are a ton of Jellyfin apps with nice UI. The core work (transcoding etc) is done by ffmpeg by all the big players (plex, emby, jellyfin) so don't expect much differentiation there.