metadataless mp3 & mp4 folder comparison

mp3-mp4-compare.sh

# Generate md5sum from mp3 file, excluding any ID3 tags
function mp3sum {
  file="$(mktemp -p /dev/shm/)"
  cp "$1" $file
  eyeD3 --remove-all -Q $file >/dev/null 2>&1
  hash=$(md5sum $file | cut -f 1 -d" ")
  echo $hash "$1"
  rm $file
}

# Generate md5sum from mp4/m4a file, excluding any metadata
function mp4sum {
  file="$(mktemp -p /dev/shm/)"
  mv $file $file.mp4
  file=$file.mp4
  cp "$1" $file
  exiftool -ext mp4 -all= -overwrite_original -q $file
  hash=$(md5sum $file | cut -f 1 -d" ")
  echo $hash "$1"
  rm $file
}

# All mp4 hashes in a directory - run this in each directory to compare
find -type f \( -name *.m4a -or -name *.mp4 \) -exec mp4sum {} \; > Internal-Music-mp4sum.txt

# All mp3 hashes in a directory - run this in each directory to compare
find -type f -name *.mp3 -exec mp3sum.sh {} \; > Internal-Music-mp3sum.txt

# Compare generated files
diff <(cat ~/Internal-Music-mp3sum.txt | sort | cut -f 1 -d" ") <(cat ~/External-Music-mp3sum.txt | sort | cut -f 1 -d" ") | grep '^>' | awk '{print $2}' | while read hash; do grep $hash External-Music-mp3sum.txt ; done | sort -k2 | less
diff <(cat ~/Internal-Music-mp4sum.txt | sort | cut -f 1 -d" ") <(cat ~/External-Music-mp4sum.txt | sort | cut -f 1 -d" ") | grep '^>' | awk '{print $2}' | while read hash; do grep $hash External-Music-mp4sum.txt ; done | sort -k2 | less