Ronald Bultje wrote:

> On Mon, 2002-03-18 at 08:47, Kevin Atkinson wrote:
> 
>>Now, how about being able to simply extract the audio and video stream 
>>from an AVI file and put it into a Quicktime file without any 
>>conversions.  How about the reverse.
>>
> 
> lavtrans file.mov -fa -o file.avi #-fa => format=avi
> lavtrans file.avi -fq -o file.mov #-fq => format=qt

Does that work with ANY AVI or QT format or just ones with MJPEG in them?

>>Also how about taking an AVI file 
>>with Mpeg video in it (courtesy of MEncoder) and creating a valid Mpeg 1 
>>system stream.
>
> Never heard of that. mplayer has a yuv4mpeg (the mjpegtools' YUV stream
> format) output plugin with which you can use mplayer's output as input
> for other tools of the mjpegtools, so it shouldn't be a problem.

A generic utility that can combine, split, or convert any AVI/QT/MPEG 
stream should be able to do this with no problem.  That is what I am 
looking for.

>>Or what about being able to fix broken Quicktime or AVI 
>>files, such as Quicktime files that don't have any codec code in it?
> 
> It seems that mplayer can sometimes fix them. In that case, use mplayer
> and the yuv4mpeg output plugin. Concerning the mjpegtools: broken files
> are broken and will thus not play (i.e. repair the recorder).

That is often a lot easier said than done.




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