FrenchYT
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FrenchYT's post in Jellyfin Transcoding - Arc Pro B50 was marked as the answerHello everyone,
I wanted to post an update as I finally solved the issue.
The Jellyfin Docker container was not the problem. The root cause was actually a BIOS/Unraid compatibility issue with the Intel Arc Pro B50.
I also updated Unraid from 7.3.0 to 7.3.1, although I'm not certain this was strictly required.
The settings that fixed hardware transcoding for me were:
Above 4G Decoding → Enabled
Resizable BAR → Enabled
CSM → Disabled (UEFI only)
PCIe slot speed manually set to PCIe 4.0 instead of Auto
My hardware:
AMD Ryzen 9 3900X
Gigabyte B550 Vision D
Intel Arc Pro B50 (Battlemage)
After applying these BIOS settings and rebooting, Jellyfin was able to use the GPU correctly for hardware transcoding. VAAPI and Intel QSV are now working as expected.
Hopefully this helps anyone trying to use an Intel Arc Battlemage GPU (B50/B580, etc.) with Unraid and Jellyfin.
Thanks to everyone who took the time to help.