[MEncoder-users] Video and Audio async

[Tobias Brockamp]

Am 23.03.2007 um 04:38 schrieb larrystotler at netscape.net:

> -----Original Message-----
> From: tobiasbrockamp at gmx.de
>> Sorry, but this does not solve my problem. I still have different
> length of video and audio.
>> Just for consideration, i tried to import an AVI-File into iMovie on
> my Mac, i then export the
>> movie for the iPod. The video file i get is 100%sync, audio and video
> have the same lenght.
>> I know that iPod is mp4/h264/aac but i also have the problem with  
>> this
> codecs over ffmpeg
>> or mencoder.
>> Also interesting is that when i import an AVI which has different
> length for video and audio
>> into iMovie and export it. The resulting video is 100% sync again.  
>> Why
> can't ffmpeg or mencoder
>> do that? Or do they? When yes, pleaaaaase tell me how!
>
> Ok, when you said that this was a raw avi file, what are you using  
> to create it, or what was used to create it.  Further, is this an  
> ntsc or pal format file.  I've heard that if you try to re-encode  
> from pal to ntsc, sometimes you can get it out of sync.  The reason  
> I ask if that you specified 25fps, and isn't that a pal format?  I  
> guess unless you could post the file or a small part for someone  
> else to look at and try, we can't do much to help.  Also, what  
> version of mencoder are you using?  Is it a binary, or did you  
> compile it?

Hi,

i did an upload of an uncompressed avi on my server:

http://www.alexjacob.info/uploads/vid/

I also upload a video which i have encoded with Xvid/mp3.

As you can see the audiostream is 60ms shorter than the videostream.

Any suggestions?


Kind regards,


Tobias Brockamp

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