[gst-devel] why audio is used as a reference in AV sync.

[Martin Bisson]

It's generally because a skip in audio playback is much more noticeable 
than skipping (or repeating) a frame.  Also, it is possible to use the 
sound card as a clock generator for synchronization based on the 
supposed playrate (might not be EXACTLY 44100 Hz...  hence the use of 
the card as a clock generator) and the time taken to "consume" a number 
of bytes.

Martin


amitpandya at itimes.com wrote:
> Hi all,
>
> I have a question regarding AV synchronization.
>
> Normally when we deal with both audio+video data processing in gstreamer,
> we takes audio as a reference for AV synchronization and not the video frames.
>
> Why is it so?
> What is the advantage of doing so?
> Why shouldn't we tak video frames as our reference while synchronization at muxer?  
>
> Thanks,
> Amit Pandya.
>
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