[MEncoder-users] losing audio sync during video capture

[DaveG]

On Monday 19 October 2009, DaveG wrote:
> Any suggestions or link pointers on how to get around losing audio sync
> during video capture?
>
> FreeBSD 7.1
>
> bktr0: <BrookTree 878> mem 0xe8005000-0xe8005fff irq 17 at device 8.0 on
> pci0 bktr0: [GIANT-LOCKED]
> bktr0: [ITHREAD]
> bktr0: Hauppauge Model 44805 D111
> bktr0: Hauppauge WinCast/TV, Philips PAL I tuner.
>
> MEncoder 1.0rc2-4.2.1 (C) 2000-2007 MPlayer Team
> CPU: Intel(R) Pentium(R) 4 CPU 3.20GHz (Family: 15, Model: 3, Stepping: 4)
> CPUflags: Type: 15 MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
>
> #!/bin/sh
> length="-endpos 00:11:00"
> outfile=/home9/camcorder/camcorder.avi
> audio="-oac mp3lame -lameopts cbr:br=128"
> filter="-vf pp=lb,crop=738:560:16:8,scale=738:290"
> bitrate="vbitrate=8000"
> video="-fps 25 -ovc lavc -lavcopts vcodec=mpeg4:ildct:ilme:vhq:keyint=250"
> mencoder -noskip -mc 0 tv://0 ${length} ${filter} ${video}:${bitrate} /
>                  ${audio} -of avi -ffourcc DX50 -o ${outfile}
>
> While capturing, framerate gets up to 24.9fps.  Sound is lagging by at
> least 0.5s within 60s of playback.
>
> Should I be trying to "fix" the above command line or trying some other
> codec? Do I need a better capture card?
>
> Ideally I'd like the output file to be in DV for editing in kino but I
> can't get past the problem of two streams being required.   Googling for dv
> encoding points to using -tv options such as amode=1, forceaudio etc. but
> mencoder, despite having amode and forceaudio in the man page mencoder
> insists it doesn't understand those options.
>
> Do you need any other info to help me out/point me in the right direction?

Is anyone there?

-- 
Dave