Get whole duration of folders and subfolders with sound files
Solution 1:
If you have ffmpeg installed you probly have ffprobe too.
man ffprobe
for example, to ouput only the duration in format seconds you can do
ffprobe -hide_banner -v error -of default=noprint_wrappers=1:nokey=1 -show_entries stream=duration sound.mp3
If you want duration for each file you need to recurse.
find . -type f -name "*.mp3" -print0 | parallel -0 'echo "{} : `ffprobe -hide_banner -v error -of default=noprint_wrappers=1:nokey=1 -show_entries stream=duration {}`"'
ffprobe takes some time so we parallelized
You might want to sum durations to get a whole directories hierarchy duration:
find . -type f -name "*.mp3" -print0 | parallel -0 ffprobe -hide_banner -v error -of default=noprint_wrappers=1:nokey=1 -show_entries stream=duration | paste - -sd+ - | bc