Calculate Duration Of Files In Directory

exiftool * | grep '^Duration' | sed 's/^.*[[:space:]]\([0-9]*:[0-9]*:[0-9]*\).*$/\1/g' | awk -F':' '{ H+=$1;M+=$2;S+=$3 } END { printf "%d:%d:%d\n", int(H+int(M/60)),int(M+S/60)%60,S%60 }'
When you want to know the duration of all your mp3 files in the current working directory this command will tell you based on exif data. Since it relies on exif data it can be used against other files like movies, ogg vorbis etc. also. Useful when you want to know how long it will take to listen to an album or series of lectures.
Sample Output
3:15:29

0
2015-06-17 06:20:47

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