Remove MP3 audio files shorter than X seconds from a folder.

remove_audio.sh

#!/bin/bash
# Simple bash script that will remove MP3 audio file from a folder, if their duration in seconds 
# does not match the passed duration input. Note: the script must be executed in the interested folder.

function get_duration {
  total_len=0
  for file in `pwd`/*; do
  	cur_len=$(ffprobe -i $file -show_entries format=duration -v quiet -of csv="p=0")
  	cur_len=${cur_len%.*}
    total_len=$((total_len+cur_len))
  done 
  echo $total_len
}

if ! [[ "$1" =~ ^[0-9]+$ ]] && [ "$#" -ne 1 ]; then 
  echo "Must provide an integer to define max duration lenght of the audio. Exiting.."
  exit 1
fi

file_deleted=0
min_len=$1
dur=$(get_duration)
for file in `pwd`/*; do
  if [ ${file: -4} == ".mp3" ]; then
    len=$(ffprobe -i $file -show_entries format=duration -v quiet -of csv="p=0")
  	echo -n "$file got lenght of $len "
  	if [ ${len%.*} -gt ${min_len} ]; then 
  	  echo "- PRESERVED"
  	else 
  	  rm $file
  	  echo "- DELETED"
  	  file_deleted++
  	fi
  fi
done

dur=$(get_duration)
echo "STATS ---------------------"
echo "File deleted: $file_deleted"
echo "Total audio lenght BEFORE deleting: $dur"
echo "Total audio lenght AFTER deleting: $dur"
echo "Done."