SOLVED: Proxmox LXC Hardware Transcoding

[C0nfigurator]

Can you share the entire ffmpeg log via pastebin?

Hey,
there it is: https://pastebin.com/HELMpEUb

Thanks for the help!

I also saw a bunch of people online suggesting this on the Proxmox Host, whicht would comfirm my suspicion that there is a permission related issue:
chmod -R 777 /dev/dri`

But I dont know about this solution...

An somehow the wrong device was selected when providing the logs, same issue with renderD128:

[AVHWDeviceContext @ 0x6176e4597f40] No VA display found for device /dev/dri/renderD128.
Device creation failed: -22.
Failed to set value 'vaapi=vadev/dri/renderD128,driver=iHD' for option 'init_hw_device': Invalid argument
Error parsing global options: Invalid argument