files=`find . -name '*.mp3'`
for f in $files:
do
	echo $f
	v=`ffmpeg -i $f   -af "volumedetect" -f null /dev/null 2>&1 | grep max_volume | awk '{print $5}'`
	av=${v/#-/}
	bn=`basename $f`
	dn=`dirname $f`
	tdn=tmp/$dn
	tf=$tdn/$bn
	echo $tdn
	mkdir -p $tdn
	ffmpeg -i $f -af volume=${av}dB -y $tf
done