You can add audio to avi with ffmpeg or mencoder (Linux, Unix, Mac, Windows)
With one command.
It would be a lossless operation for your video (video codec = copy)
GOOGLE -> "ffmpeg how to add audio to avi"
You can also play video with "external audio file" (VLC Player)
From: Igor Chernenko <igor.chernenko@gm...> - 2009-07-01 19:54:59
If you want to add a particular audio file to a movie, use:
mencoder source.avi -o destination.avi -ovc copy -oac mp3lame
-audiofile file.wav (for uncompressed files)
mencoder source.avi -o destination.avi -ovc copy -oac copy -audiofile
file.mp3 (for compressed files)
CLI Magic: Video conversion with mencoder
By Razvan T. Coloja on November 20, 2007 (4:00:00 PM)