[LINUX] Convert MP4 to MP3

autoConvert.sh

#!/bin/bash
for f in *.mp4
do
    echo "Converting $f"
    name=`echo "$f" | sed -e "s/.mp4$//g"`
    ffmpeg -i "$f" -vn -acodec libmp3lame -ac 2 -ab 160k -ar 48000 "$name.mp3"
done

convert_MP4toMP3.sh

sudo apt-get install libavcodec-extra-53
ffmpeg -i video.mp4 -vn -acodec libmp3lame -ac 2 -ab 160k -ar 48000 audio.mp3