Convert all mp4 files to mp3 in current directory, deleting them

mp4amp3

#!/usr/bin/env bash

# seen in http://www.unixmen.com/linux-basics-convert-mp4-mp3/
for filename in *.mp4
do
	name=`echo "$filename" | sed -e "s/.mp4$//g"`
	ffmpeg -i "$filename" -b:a 192K -vn "$name.mp3"
	rm "$filename"
done