[MPlayer-users] Failed to open VDPAU backend libvdpau_nvidia.so

Matus UHLAR - fantomas uhlar at fantomas.sk
Fri Jul 31 09:15:56 CEST 2015

>Matus UHLAR - fantomas <uhlar at fantomas.sk> writes:
>> I'd try to compare vdpau and xv to see which uses
>> less of CPU time - vdpau is supposed to do more on
>> the graphics card than xv. I'd use vdpau if it
>> behaved better

On 21.07.15 23:04, Emanuel Berg wrote:
>With "vdpau", what invocation do you mean exactly?

-vo vdpau and -vo xv

>And, do you have a good method to quantify CPU use?

either what mplayer tells you, or what 'top' gives you.

>>From playing the same file for roughly the same time,
>while using top(1), I observed this CPU usage for the
>different invocations:
>mplayer1 -vo xv -nojoystick -nolirc -loop 0 -fs $@ > /dev/null             # ~5%
>mplayer1 -nojoystick -nolirc -loop 0 -fs $@ > /dev/null                    # ~5%

was VDPAU used in this case?

>mplayer1 -vo gl -nojoystick -nolirc -loop 0 -fs $@ > /dev/null             # ~5-6%
>VDPAU_DRIVER=va_gl mplayer1 -nojoystick -nolirc -loop 0 -fs $@ > /dev/null # ~9-10%

seems that using GL either directly or for VDPAU emulation does not make
sense if XV is used... 
Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
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