"[00007f9090000958] vdpau_avcodec generic error: decoder profile not supported: 6" means that:
1) your libavcodec installation does support VDPAU properly, and
2 ) your VDPAU driver does not support H.264 decoding at all (or reports incorrect capabilities).
"[00007f9090000958] vdpau_avcodec generic error: decoder profile not supported: 6" means that:
1) your libavcodec installation does support VDPAU properly, and
2 ) your VDPAU driver does not support H.264 decoding at all (or reports incorrect capabilities).
Closing as invalid.