for f in `ls`
do
	xxd -l 16 $f > xxd_result
	if grep -q Exif xxd_result; then
		echo $f.jpg
		mv $f $f.jpg
	else
		if grep -q ftypqt xxd_result; then
			echo $f.mov
			mv $f $f.mov
		else
			echo $f UNKNOWN
		fi
	fi
done