[MPlayer-users] recent benchmarks indicate ffh264 slowed

[Robert Henney]

this may be an ffmpeg issue, but as I've made the tests using
mplayer I'm not certain that the problem isn't with how mplayer
is making use of ffmpeg.  I can repost to the ffmpeg list if
thought to be a good idea.

around the 14th/15th of this month something changed in svn which
caused decoding h264 to take a significant amount more cpu, and 
which still exists in current svn.  there has been another small 
slowdown in decoding since then as well, but much less severe.

benchmarks were obtained by looping repeatly for hours on a dedicated
machine and taking the best time for each binary.  test machine was a 
Pentium II 400.


first, using vo null:
mplayer -quiet -endpos 60 -nosound -benchmark -vo null test.mkv

mplayer r25998, ffmpeg r11950	;prior to commit leading to slow down
BENCHMARKs: VC: 106.599s VO:   0.011s A:   0.000s Sys:   0.348s =  106.958s
BENCHMARK%: VC: 99.6643% VO:  0.0103% A:  0.0000% Sys:  0.3254% = 100.0000%

mplayer r25998, ffmpeg r11965	;after commit leading to slow down
BENCHMARKs: VC: 111.894s VO:   0.011s A:   0.000s Sys:   0.347s =  112.252s
BENCHMARK%: VC: 99.6812% VO:  0.0100% A:  0.0000% Sys:  0.3088% = 100.0000%

mplayer r26058, ffmpeg r12176	;current
BENCHMARKs: VC: 113.300s VO:   0.011s A:   0.000s Sys:   0.348s =  113.659s
BENCHMARK%: VC: 99.6842% VO:  0.0099% A:  0.0000% Sys:  0.3059% = 100.0000%


next, using vo xv:
mplayer -quiet -endpos 60 -nosound -benchmark -vo xv test.mkv

mplayer r25998, ffmpeg r11950	;prior to commit leading to slow down
BENCHMARKs: VC: 107.005s VO:  11.487s A:   0.000s Sys:   0.358s =  118.850s
BENCHMARK%: VC: 90.0341% VO:  9.6648% A:  0.0000% Sys:  0.3011% = 100.0000%

mplayer r25998, ffmpeg r11965	;after commit leading to slow down
BENCHMARKs: VC: 112.234s VO:  11.470s A:   0.000s Sys:   0.363s =  124.067s
BENCHMARK%: VC: 90.4623% VO:  9.2448% A:  0.0000% Sys:  0.2929% = 100.0000%

mplayer r26058, ffmpeg r12176	;current
BENCHMARKs: VC: 113.474s VO:  11.578s A:   0.000s Sys:   0.356s =  125.408s
BENCHMARK%: VC: 90.4838% VO:  9.2319% A:  0.0000% Sys:  0.2842% = 100.0000%