Judder in JF but not MPV

[nope]

I'm not sure how to help you.  You shouldn't need to tweak all these settings in the player.

Thank you for attempting to help, but I'd like to hear from someone who does have an idea of what could be done.

edit:

You keep on telling me to do things that might help if I had judder in MPV, but I do not have judder in MPV. I have a smooth playback experience in MPV.

Decoding videos is not a problem on my system. My system decodes videos and plays them back smoothly without judder or stutter.

I am only experiencing problems with Jellyfin.

[sevenrats]

in order to analyze this situation with any seriousness we would need a full understanding of why some playback fails without that direct 3d feature disabled. that doesn't make any sense and I think everybody that's trying to help you is going to trip over that. We need to remove your mpv config entirely, test that state, and then add all of these options back one by one. If playback depends on any of them, we need to go back to the drawing board and fix the real problem.