This is how I extract audio and convert to MP3.  Should work for any format that MPlayer understands, audio or video.
1. mplayer -ao pcm FileName.wmv (This creates a file named "audiodump.wav")
2.  lame -m s -q 2 --vbr-new -V 1 -B 320 audiodump.wav OutputName.mp3  (Lame changes it to an mp3)
Of course you need lame and mplayer and the proper codecs.  This is very useful for dumping streaming audio as well.
-Ben


On 2/13/06, Alan Dayley <alandd@consultpros.com> wrote:
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Alan Dayley wrote:
> I have a video file in WMV 8 format.  I need to extract the audio from
> it.  Anyone know how to do that on Linux, of course?

Replying to myself since the urgency of the answer is removed.

I did not find a solution to my question.  However, I was able to rip
the needed video segment of the same performance from a DVD.  I forgot I
had the DVD.  So, now having the video in MPEG, I'll be able to extract
the audio with Avidemux.

Still, if anyone finds an answer to my question, I'd be happy to hear
about it.

Alan
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