[MEncoder-users] losing audio sync during video capture

[Jarred Nicholls]

I recommend compiling a later version of mencoder from SVN snapshot.   
Your version is quite old.

Sent from my iPhone

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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