[MPlayer-users] different audio/video length using mencoder

[Thorben Kröger]

On Sunday 30 January 2005 13:23, Thorben Kröger wrote:
> The length of audio and video seem not to match:
> Video stream: 1445.817 kbit/s  (180727 bps)  size: 6325450 bytes  35.000
> secs 875 frames
> Audio stream:  218.760 kbit/s  (27345 bps)  size: 969984 bytes  35.472 secs
> This wouldn't be much of a problem (video plays fine) but when putting the
> segments in cinelerra the audio track is of course slightly longer and when
> you append another segment there might be gaps in the video or something
> similar.

> Is there a workaround?

I was able to get an improvement in the difference of audio/video, but it is 
not gone entirely:

mencoder dvd://1 -mc 0 -noskip -sb 1310000000 -endpos 36 -ovc lavc -lavcopts 
vcodec=mpeg4:mbd=1:vbitrate=1800 -oac mp3lame -lameopts br=192 -vf scale 
-zoom -xy 720 -o test.avi

#test.avi
Video stream: 1684.654 kbit/s  (210581 bps)  size: 7580944 bytes  36.000 secs  
900 frames
Audio stream:  221.474 kbit/s  (27684 bps)  size: 1009920 bytes  36.480 secs

using -audio-preload 0.0 (see 
http://www.linuxquestions.org/questions/showthread.php?s=&forumid=62&threadid=278124) 
in addition seems to improve the length-difference, but as you can see it not 
entirely gone...

#test2.avi
Video stream: 1684.654 kbit/s  (210581 bps)  size: 7580944 bytes  36.000 secs  
900 frames
Audio stream:  221.758 kbit/s  (27719 bps)  size: 997248 bytes  35.976 secs

Thorben