I have recently set up a Jellyfin server running on a Beelink S12 pro in docker (with a few other containers running), and I am having a few problems with stuttering video.
I get little micro-stutters every few seconds regardless of whether it is direct play or transcoding and regardless of what client I use (librelec with Jellyfin plugin), android phone, or firefox on a windows laptop), and I am struggling to narrow down the cause of it.
Any ideas of where I should look first?
The server utilisation seems low, I have tried a wired and wifi connection, I have tried 720, 1080, and 2160 resolution videos, with and without transcoding.
Might be a network issue, check your upload speed. I had similar problems and the issue was that I was using a cat5 cable on my server, which was limiting the upload to 100mb, causing it to stutter while playing videos with high bitrates