Mp4 video file to aac audio with mencoder

[ficofico]

Hi guys, I need to extract aac audio for a mp4 video file ( nokia videos) with mencoder, I've write this script, but it doesn't work

mencoder "file.mp4" -ovc frameno -o "audio.aac"


What is wrong on this script?

thank you.

[ficofico]

all ok, i've done