[MPlayer-users] mencoder a-v sync and DVDs (again)

Arpi arpi at thot.banki.hu
Wed Feb 12 21:48:02 CET 2003


Hi,

> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> Hi!
> 
> In that case would -mc 5 cure the desync with mencoder somewhat ?

no. why should it?
mencoder just doens't know about the codec delaying the data.

> 
> bye
> Denes
> 
> 
> On 2003. február 12. 21:27, Arpi wrote:
> 
> > the difference is that mplayer compensates A-V by teh audio card's
> > buffering delay, while mencoder doe sthe compensation of muxer's delay
> > (preload).
> >
> > i can imagine that the <100ms delay comes from the audio codecs, probably
> > from libmp3lame's buffering, especialy in VBR modes.
> > there are ~38 audio frames for 1 sec, it means ~26ms/frame, so if it
> > buffers up a few frames it may cause some delay.
> >
> > try encoding using -oac pcm, or -oac copy and check if the delay still
> > exists. maybe i have to hack it a bit to compensate codec's (encoder)
> > delay.
> >
> > also, it's possible that video encoder delays 1 frame, if using B frames.
> > try -ovc rawrgb, if it solves a-v issue then it's the problem.
> >
> >
> > A'rpi / Astral & ESP-team
> 
> 
> _______________________________________________
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> 


A'rpi / Astral & ESP-team

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