[MPlayer-users] audio leads video
geoff at hughes.net
Wed Jul 29 00:32:09 CEST 2009
Carl, thanks for your info. Questions below.
On 07/28/2009 11:17:04 AM, Carl Eugen Hoyos wrote:
> Geoffrey Leach <geoff <at> hughes.net> writes:
> > You should have KTXLtest_1225_for_5_1280x720_60hz_ts.mpeg2
> With this sample, I never see framedrops with vo vdpau, vo xv and vo
> gl (with or
> without yuv=2). CPU usage is very low (>80% idle, except for
> gl:yuv=0). The
> status line reports 0% vo usage with gl:yuv=2, 5% for xv and below 20
> for vdpau
> (note that these numbers are never exact, but iirc, it showed 70% for
> you, which
> is a problem imo).
The log file in my original post shows video codec CPU usage of 19% and
video_out CPU usage of 75%. Are you referring to the 75%? And it
should be below 20%? If this is so, then is this is the source of my
> With vc ffmpeg12vdpau, CPU usage is around 2%.
> A/V sync is fine in all cases, it does not matter (much) if I use -ac
> a52 or -ac
When I run mplayer -vc ffmpeg12vdpau
KTXLtest_1225_for_5_1280x720_60hz_ts.mpeg2 the dropped frames start at
zero seconds. Adding -ao alsa::device=hw=0.3 gives me 3 min 22 sec of
play before frames are dropped.
There's a minor problem comparing the clip you have and mine. The
sample you have been using, KTXLtest_1225_for_5_1280x720_60hz_ts.mpeg2,
is corrupted; you have only 30 seconds of a 5 minute clip. For what
follows, I've switched to test_episode_1602_1280x720_60hz_ts.mpeg2,
which you should also have. The full clip is just one minue, so its
easier to do timing. When I run mplayer -vc ffmpeg12vdpau
test_episode_1602_1280x720_60hz_ts.mpeg2, dropped frames start at zero
> To test that you do not have an alsa issue, try:
> time mplayer KTXLtest_1225_for_5_1280x720_60hz_ts.mpeg2 -nosound
> It finishes after 20sec for the usual vo's for me (with your 30 sec
> sample). If
> it does not take longer for you, try other ao's.
time mplayer -vc ffmpeg12vdpau -nosound -benchmark
TS_PARSE: COULDN'T SYNC 98% 0.0% 0 0
V:19687.8 3404/3404 0% 98% 0.0% 0 0
BENCHMARKs: VC: 0.205s VO: 55.693s A: 0.000s Sys: 0.871s =
BENCHMARK%: VC: 0.3610% VO: 98.1044% A: 0.0000% Sys: 1.5346% =
Could you interpret this for me? If it shows I don't have an alsa
problem, why is that? What is the significance of "TS_PARSE: COULDN'T
SYNC"? How t oI interpret the BENCHMARK numbers? (As always, a link is
> You could also test -lavdopts fast:threads=2
time to dropped frames 9.1s -> 19.5s
> or even -lavdopts fast:threads=2:skipidct=all (degrades quality, see
time to dropped frames 9.1s -> 28.6s
Do either of these results suggest anything?
> If you suspect something is wrong with your setup (or do all/some on
> NVIDIA video cards have similar problems?) - consider a report at
I will follow up here.
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