Extract audio from video

Hi,
I want to extract audio from any video file like .mp4, .avi etc
Can we do it in QT? Please help.
Thanks..

I have tired it before, but if you want to extract audio from video, you're free to try Wax and Windows Movie Maker: http://www.windows-movie-maker.org/
For more input formats, you can also use some programs that can change vieo to audio directly like this one: http://www.videoconverterfactory.com...ge-videos.html
Cheers!