Jellyfin Media Player encoding while direct playing?

[Bibabutzemann]

Hi,
i have a Jellyfin Server on my Windows PC. When i want to watch Content on that PC i noticed that watching through the Jellyfin Media Player doesnt feel nearly as responsive as using MPV Shim. MPV Shim is basically as fast as just opening the Movie with a Video Player like MPV or VLC.
What i mean by responsive is, that skipping forward or backwards feels a bit sluggish on the Media Player, while in MPV Shim it skips instantly.
So i checked the GPU usage in the Task Manager and noticed that there is a bit Encoding usage (10-15%) while watching a movie in the Media Player. When watching through the Jellyfin Fin it stays at 0%.
Could this cause this sluggishness?
And im wondering why there is any Encoding at all when it says "Direct Playing" in the Info.

[TheDreadPirate]

Is the content HDR?

[bitmap]

Could you provide ffprobe of the media file as well as recreating the issue and grabbing the ffmpeg logs from that period? You can check if any transcoding, remuxing, or audio transcoding is happening by playing the media and looking at the server dashboard. Clicking the info icon will tell you what is happening. Knowing the media information offers more insight into what might be happening, having the logs explicitly tells us.

Direct playing doesn't mean you're on the same device, by the way. It means the client (JMP in this case) is entirely compatible with the media you're playing. If JMP or any client reports it isn't compatible for whatever reason, that triggers transcoding, remuxing, or transcoding of audio.

[Bibabutzemann]

Hi, it is not HDR content.
I checked on the Server Dashboard and it said it is Direct Playing.
I tested different content, mostly MKV container with hvec video and aac audio.
When i direct stream to my android tablet and use the jellyfin app my PC doesnt show any gpu usage, so im sure it has nothing to do with the server.
I now also noticed now that other players like VLC also use my GPU for decoding.
So im starting to think that its just MPV not using my GPU, but its completely normal behaviour that there is some decoding going on?
Im sorry if i wasted your time, im a complete noob in this topic.
Though im still wondering why casting to MPV Shim is so much snappier than the integrated player in JMP.

Thanks for this fast support anyway!
Cheers Patrick