[MPlayer-users] A/V sync with two-stage encoding

[D Richard Felker III]

On Fri, Apr 30, 2004 at 06:20:47PM +0100, Ian Smith wrote:
> Ian Smith wrote, on 29/04/04 20:19:
> 
> >also tried using abr for the audio just in case.  Whatever I try there 
> >seems to be a small initial A/V offset, which increases gradually with 
> >time.
> >
> >Bearing in mind what I said about using MPEG as source, I can only 
> >assume that there is some effect at play that causes mencoder to 
> >misbehave in this way when fed with it's own output?
> >
> >If anyone can think of any other tests I can do, please let me know.
> >
> 
> Just reconfirmed similar effect with libavcodec mpeg4 vqscale=2 as the 
> master.
> 
> Has anyone succesfully done anything similar to this?  Any clues 
> gratefully accepted.

Are you seeing skipped or duplicate frames? If so, that's a definite
sign of problem. Try adding -mc 0 to the command line. It disables the
brain damaged A/V sync "repair" code in mencoder and only uses basic
sync.

Rich