SOLVED: Remux Transcoding question

[Nex1337]

Hello
When I play a 4k movie on my TV (LG CX), jellyfin tries to transcode it using the “Remux” method, unfortunately I have no idea why this is happening. 
I would ask you to read the logs. Thanks

https://pastebin.com/FwLEeHZj

[TheDreadPirate]

The source HDR video is in a MKV and the output container is MP4. WebOS requires HDR content to be in a MP4 container.

Remuxing does not perform any actual re-encoding. Just changing the container.

Code:

Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)

[Nex1337]

thanks a lot for the answer, so I will not lose quality etc.? (Sorry, I'm a beginner at jellyfin)

[TheDreadPirate]

Remuxing is just changing the container. The video, audio, and subtitles are copied unmodified.