SOLVED: Jellyfin in Container

[fcs001fcs]

To verify HW transcoding is working properly you can open the Jellyfin dashboard in the Jellyfin menu. Go to the advanced section and log-files "logboeken" in Dutch.

If you did wacht a file that needed transcoding you will see log files starting with ffmpeg.transcode-...
Search for the part where it shows what ffmpeg is doing. See my example below. If it states h264_vaapi the HW transcoding is working correctly.

Stream mapping:
  Stream #0:0 -> #0:0 (vp9 (native) -> h264 (h264_vaapi))
  Stream #0:1 -> #0:1 (vorbis (native) -> ac3 (native))

Thanks for the advice to confirm, I still had doubts, but it does seem to be working. Below is a 4k video streamed to a Win 11 machine in an Edge video player.

Stream mapping:
  Stream #0:0 -> #0:0 (hevc (native) -> h264 (h264_qsv))
  Stream #0:2 -> #0:1 (eac3 (native) -> aac (libfdk_aac))

Video info from Jellyfin:

Video
Title: 4K HEVC HDR
Codec: HEVC
Profile: Main 10
Level: 150
Resolution: 3840x2160
Aspect ratio: 16:9
Interlaced: No
Framerate: 23.976025
Bitrate: 25603 kbps
Bit depth: 10 bit
Video range: HDR
Video range type: HDR10
Color space: bt2020nc
Color transfer: smpte2084
Color primaries: bt2020
Pixel format: yuv420p10le
Ref frames: 1