[Ffmpeg-devel] Question about FAQ 1.3

Michel Bardiaux mbardiaux
Mon Dec 26 10:23:22 CET 2005

Erik Slagter wrote:
> On Sun, 2005-12-11 at 15:57 +0100, Luca Abeni wrote:
>>On Sat, 2005-12-10 at 21:17 +0100, Balatoni Denes wrote:
>>>Maybe it is referring to the a-v desync that's possible if the soundcard is 
>>>not exactly clocked at the nominal sampling rate (eg. 44100 Hz). For one, 
>>>MEncoder compensates for this (the video and audio stay in sync although the 
>>>audio is faster/slower than in the original).
>>If I understand correctly, I think ffmpeg can compensate this drift too,
>>by properly resampling the audio to synchronize audio and video. I think
>>this is what the async option is for, right?
>>Maybe the FAQ entry has been written before async was implemented?
> Of course this would better be solved with video4linux2 support, but I
> guess I'd better shut up or get to write the code ;-)
Exactly *what* feature of V4L2 would be useful for resync, beyond the 
availability of timestamps?

Michel Bardiaux
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