[MEncoder-users] losing audio sync during video capture

[DaveG]

On Wednesday 30 December 2009, Jarred Nicholls wrote:
> I recommend compiling a later version of mencoder from SVN snapshot.
> Your version is quite old.
>
> Sent from my iPhone

That's a good point.  I'm using the "latest" from FreeBSD ports.  I've also 
since found that /some/ but not all audio applications are stuttering, 
mplayer not included.  I need to find the cause of that in case it's 
affecting things.

> On Dec 30, 2009, at 1:47 PM, DaveG <mplayer01 at dgmm.net> wrote:
> > 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
> > _______________________________________________
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> > MEncoder-users at mplayerhq.hu
> > https://lists.mplayerhq.hu/mailman/listinfo/mencoder-users
>
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-- 
Dave