[mythtv-users] DVD audio/video offset?

[Thomas Börkel]

HI!

Bruce Smith wrote:
> I've managed to burn a DVD from a myth recored show with the script
> someone posted, which basically does this:  (thanks to the poster(s)!)
> 
>   mpeg2desc -a0 < $1 > aud0 &
>   mpeg2desc -v0 < $1 > vid0 &
>   mplex -f 8 -V -o dvdmpg aud0 vid0 &
>   dvdauthor -o $WORKDIR -f dvdmpg
>   dvdauthor -o $WORKDIR -T
> 
> It plays fine, except the sound is slightly out of sync with the video.
> The only way I notice it is watching people's lips while they talk, 
> then it looks like the show is dubbed.  The show plays fine in Myth.
> 
> I've tried using tcmplex instead of mplex, and I've tried avidemux2 to
> separate the steams instead of mpeg2desc, all with the same results.
> 
> I see there is a sync-offset parameter for the [tc]mplex programs, but I
> know no idea what value to give it.  What offset value do other people
> use when making DVD's from .nuv files?  Trial & error seems like a
> rather lengthly process to figure this out.  :-)

mpeg2desc -m < $1
gives you the offset, say 7000 for example.

mplex -O 7000mpt

I have already seen somewhere a script which does this automatically.

Thomas