Script which converts all flac files inside a folder to mp3, ogg vorbis or opus and puts them in another directory, maintaining the artist/album directory path scheme

folder_enc.sh

#!/bin/sh
set -eu

# folder_enc.sh
# Original author: Hiradur
# License: CC0
# Description: Converts all flac files in a given folder to mp3, vorbis or opus
# files and put them in a different directory while maintaining the artist/album
# folder structure.

# select filetype and codec (use ogg for vorbis)
CONVERT_TO=mp3 # mp3, ogg or opus

# get the last two directory strings of pwd 
# Example: pwd is "/Music/Vollenweider, Andreas/Down To The Moon"
# then we get "Vollenweider, Andreas/Down To The Moon"
albumpath=$(pwd | sed 's#.*[/]\([^/]*\)[/]\([^/]*\)$#\1/\2#')

# converted files will be put into 
# ~/Music/<filetype>/Vollenweider, Andreas/Down To The Moon/
mkdir -p "$HOME/Music/$CONVERT_TO/$albumpath"

for file in *.flac
do
  # path to output file
  file2=${albumpath}/${file%.flac}

  if [ $CONVERT_TO = mp3 ]; then
    ffmpeg -i "$file" -codec:a libmp3lame -q:a 1 "$HOME/Music/mp3/$file2.mp3"
  elif [ $CONVERT_TO = ogg ]; then
    oggenc "$file" -q7 -o "$HOME/Music/ogg/$file2.ogg"
  elif [ $CONVERT_TO = opus ]; then
    opusenc --bitrate 224 "$file" "$HOME/Music/opus/$file2.opus"
  fi
done