I have found the problem and a workaround. Apparently steam is using the system's ffmpeg for video-encoding. But for hardware-acceleration only the h264_nvenc encoder is tried (not vdpau or va). NVENC has been removed from Debian, so the system's ffmpeg no longer supports this.
Workaround by me: install ffmpeg from http://www.deb-multimedia.org/ (this is still built with NVENC support).
Workaround by you: ship own ffmpeg.
FIX by you: Simply use libva instead?
I am actually not sure whether FFMPEG is the important package, but it is necessary to add the debian multimedia repo and replace the system media libraries with versions from there.
Hello @h-2, are you still experiencing this issue on an up to date system?
Closing pending feedback.
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Your system information
Please describe your issue in as much detail as possible:
Video encoding happens in software instead of hardware as can be seen by slight delay when playing and the log file:
It is activated in the
Advanced Host Options, i tried with NVFBC turned on and off (no difference).This is the list of installed Nvidia packages:
This is the output of vdpauinfo:
This is the output of vainfo:
Thank you for your help!