[MEncoder-users] Mencoder adding AVI file header to MPEG2 capture from V4L device?

[Nico Sabbi]

Brian Keener wrote:

>
> I already had -vf harddup; added noskip and set a low keyint, and I 
> still get an initial spurt of about 30 "initial delay of 0 frames", 
> nothing else, and hideous a/v sync.
>
> The real odd part is that it captured fine without the "-of mpeg" 
> option, and reports no skipped frames at the end.
>
> Brian K
>
>

if the following is your command line I can guess why: you are using 
lame in vbr more.
At the moment the mpeg muxer  can only mux cbr audio; my version at home 
can already
save correctly vbr audio (mp3/mp2/aac/ac3),
but there are still a couple of minor things to fix. In the meantime 
adding -lameopts cbr should
solve A/V sync problems.

Hopefully I'll commit the new muxer in the week-end

> mencoder -fps 30000/1001 -endpos 00:00:05 -oac mp3lame -ovc lavc 
> -lameopts mode=1:vbr=1:q=4 -lavcopts vcodec=mpeg2video:vbitrate=6000 
> -tv 
> driver=v4l2:norm=ntsc:input=2:adevice=/dev/dsp1:width=720:height=480 
> -vf harddup -af volume=-1 -o tv.mpg tv://
>