One simple way is to play the movie and record the audio with Audacity
with the "What U Hear" or "Stereo Mix" input option (instead of
microphone).  The problem with this, of course, is that the recording
process takes as long as the movie does to play.

If you own QuickTime Pro, you can open the MP4 and Export "Sound to
Wave."  I haven't looked--does anyone know if there is a plug-in for
QuickTime so it can play FLVs?

My version of Windows Movie Maker can't deal with either MP4s or FLVs,
but it can easily export the audio track to a WMA, by doing the
 * Import the movie into Windows Movie Maker
 * Drag the clip(s) to the timeline
 * Use the + tool to expand the video track to display both the video
and audio tracks.
 * Drag the audio track(s) to the Audio/Music track
 * Save to my computer
 * Movie Maker will automatically make a WMA file.

(I imagine there's a similar--or even easier--process in iMovie.)


-----Original Message-----
From: School Information Technology Discussion
[mailto:[log in to unmask]] On Behalf Of Raymond Ballou
Sent: Tuesday, March 16, 2010 11:25 AM
To: [log in to unmask]
Subject: split audo from video

have a user who wants to stip the audio off from MP4 (flip) or FLV
(youtube) files.

has anyone done that?


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