On 11/16/21 22:48, Michael Cronenworth wrote:
On 11/15/21 12:03 PM, PGNet Dev wrote:

launch @ shell

    VDPAU_DRIVER=nvidia MOZ_LOG="Dmabuf:5, PlatformDecoderModule:5" firefox

I think you mean:

LIBVA_DRIVER_NAME=nvidia firefox

nope.

        https://en.wikipedia.org/wiki/Video_Acceleration_API
                "As of 2019, VA-API is natively supported by libva-vdpau-driver for 
cards supported by VDPAU"

libva-vdpau-driver is the translation layer that provides a VDPAU-based backend 
for VA-API.

@ https://wiki.archlinux.org/title/Hardware_video_acceleration#Configuring_VDPAU

        "
        Configuring VDPAU
        You can override the driver for VDPAU by using the VDPAU_DRIVER 
environment variable.
        The correct driver name depends on your setup:
        ...
        For NVIDIA's proprietary version set it to nvidia.
        
        Note:
            You can find the installed drivers in /usr/lib/vdpau/. They are 
used as /usr/lib/vdpau/libvdpau_${VDPAU_DRIVER}.so
        "


ls -al /usr/lib64/vdpau//libvdpau*nvidia*
  lrwxrwxrwx 1 root root   25 Nov 15 10:04 /usr/lib64/vdpau//libvdpau_nvidia.so.1 
-> libvdpau_nvidia.so.495.44*
  -rwxr-xr-x 1 root root 620K Nov 15 10:04 
/usr/lib64/vdpau//libvdpau_nvidia.so.495.44*

cref:

 https://wiki.archlinux.org/title/Hardware_video_acceleration#VDPAU_drivers
 https://wiki.archlinux.org/title/Hardware_video_acceleration#NVIDIA_driver_only
 
https://wiki.archlinux.org/title/Hardware_video_acceleration#Application_support
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