[FFmpeg-devel] How to drop audio samples?
Wed May 16 22:07:09 CEST 2007
Thanks for your advice.
> Richard Neill schreef:
>> Thanks very much - that's very helpful. How do I ensure that the audio
>> timestamps are correct? What's the best way to view the timestamps and
>> check them?
>> I've tried with various values of -async, up to 440, and it doesn't seem
>> to help, so I suspect that the camera is generating timestamps which are
>> false. I'm using a file captured thus:
I've done another capture, and find the following
dvgrab - > test.dv #capture 2 hours
mplayer test.dv #is fine, all the way through
vlc test.dv #looses sync
usr/local/bin/ffmpeg -f dv -i test.dv -vcodec mpeg4 -b 512000 -async
50 -acodec ac3 -ab 128000 -f mpegts ffmpegtest.avi
mplayer ffmpeg.avi #looses sync quite quickly.
> Can you check if VideoLAN Client is able to maintain A/V sync?
No, it isn't.
Any other suggestions?
> In the past we had a lot of problem like this *suddenly* everything
> worked in VideoLAN. If this works for you too it could be interesting to
> check what they fix or better: how they fix it.
Thanks very much,
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