View Single Post
Old 05-03-09, 09:30 AM   #6
ssnyder
Registered User
 
Join Date: Oct 2005
Posts: 13
Default Re: VDPAU slower than software-only?

Some hard numbers to support the experiences described above:

Code:
mplayer -quiet -nosound -benchmark -vo vdpau -vc ffh264vdpau movies/HereBeDragons.m4v
(.mplayer/config: nothing)

BENCHMARKs: VC:   4.407s VO: 399.643s A:   0.000s Sys:   6.466s =  410.515s
BENCHMARK%: VC:  1.0734% VO: 97.3515% A:  0.0000% Sys:  1.5751% = 100.0000%

-----

mplayer -quiet -nosound -benchmark movies/HereBeDragons.m4v
(.mplayer/config: nothing)

BENCHMARKs: VC: 236.867s VO:  49.236s A:   0.000s Sys:   2.543s =  288.645s
BENCHMARK%: VC: 82.0615% VO: 17.0575% A:  0.0000% Sys:  0.8810% = 100.0000%

-----

mplayer -quiet -nosound -benchmark movies/HereBeDragons.m4v
(.mplayer/config: lavdopts=fast=1:threads=4)

BENCHMARKs: VC:  92.028s VO:  55.334s A:   0.000s Sys:  10.197s =  157.560s
BENCHMARK%: VC: 58.4084% VO: 35.1195% A:  0.0000% Sys:  6.4721% = 100.0000%
With VDPAU enabled the CPU use is dramatically reduced, yet it takes 160% longer to play the entire video (relative to 4-thread software decode).
ssnyder is offline   Reply With Quote