[FFmpeg-user] Comments about audio sync invited
Carl Eugen Hoyos
cehoyos at ag.or.at
Tue Jul 9 14:00:45 CEST 2013
James Linder <jam <at> tigger.ws> writes:
> ffmpeg version 1.0.6
This is old, please update to current git head.
> Input #0, pulse, from 'default':
> Duration: N/A, start: 0.636342, bitrate: 1536 kb/s
> Input #1, video4linux2,v4l2, from '/dev/video0':
> Duration: N/A, start: 1373359581.412447, bitrate: 23040 kb/s
> [avi at 0x6ae480] st:0 PTS: 352982 DTS:
> 352982 < 353004 invalid, clipping
These are the culprits (note the different start
times apart from the warning).
Please try -use_wallclock_as_timestamps (it is
possible that this only works with alsa).
> > is the problem also reproducible with ffmpeg
> > alone (without the pipe to ffplay)?
> Hmmm without the ffplay display all looks good.
Maybe somebody who knows more about pipes can comment.
> I watch cpu usage at 50% odd.
What happens if you significantly reduce the load by
using a much smaller resolution?
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