For what it’s worth, I’ve been getting stuttered playback too. It gets worse or better depending on how I’ve configured everything (displays,video driver,plex etc) but ultimately it won’t be completely eliminated, in Plex for Windows app or Plex HTPC app.
Here is my thread regarding occasional but consistent FPS/stuttering issues: Routine drops in playback performance - visible FPS dropping - Plex Players - Plex Forum
After trying Plex HTPC as an alternative I have worse stuttering in some situations, as exampled in this post here: Plex HTPC feedback - #1155 by fidgetymo
According to a staff in the Plex HTPC app thread, it MIGHT be helped by an upcoming update to the MPV integration allowing for a different ‘gpu-context’ being forced to d3d11 (rather than OpenGL) in the mpv.conf - however, until Plex windows apps gets updated to that, I can’t test. I’ve read elsewhere that OpenGL might have issues with display syncing and so maybe there’s a correlation.
I completely understand your frustration here!
