No video playback

[Fate]

I just noticed, starting some videos will end up in en infinite delay, while cpu load goes to 90%+  and my whole Synology is blocked for some time. Even Surveillance Station stops recording during this time. I never had similar issues using Video Station. I have to stop and restart Jellyfin, to get my Diskstation back to normal operation.


The log is full of such stuff:
[2024-08-30 00:00:00.050 +02:00] [ERR] [85] Emby.Server.Implementations.Session.SessionManager: Error reporting playback progress
MediaBrowser.Common.Extensions.ResourceNotFoundException: Session f0ef7a631ebfc99fef8c3e3db8889a7a not found.
  at Emby.Server.Implementations.Session.SessionManager.OnPlaybackProgress(PlaybackProgressInfo info, Boolean isAutomated)
  at MediaBrowser.Controller.Session.SessionInfo.OnProgressTimerCallback(Object state)
[2024-08-30 00:00:01.051 +02:00] [ERR] [85] Emby.Server.Implementations.Session.SessionManager: Error reporting playback progress
MediaBrowser.Common.Extensions.ResourceNotFoundException: Session f0ef7a631ebfc99fef8c3e3db8889a7a not found.
  at Emby.Server.Implementations.Session.SessionManager.OnPlaybackProgress(PlaybackProgressInfo info, Boolean isAutomated)
  at MediaBrowser.Controller.Session.SessionInfo.OnProgressTimerCallback(Object state)
...

We still need a bit more log and if there is a transcode log file then that as well.

I suspicion is your client is requesting transcoding and your synology is not setup for hardware acceleration.