cd-to-mp3

#!/bin/bash
case "${1}" in
  -h|--help) cat <<EOF
Simple script to save audio tracks as .mp3 files.
This script just automates what VLC can do file by file.

Usage:
  $0 destination-dir start-track [end-track]

Example:
  # Saves track from 1 to 14 into ./cd-as-mp3 directory
  $0 ./cd-as-mp3 1 14

Default start track is 1.
When no end track is provided
only the start track is saved.

If you want to save all tracks, you need to figure out
how many tracks there are on the CD, and which are
actually audio tracks on your own.

You need VLC for this script to work.
EOF
    exit ;;
esac

DESTINATION_DIR="${1:?Provide destination directory. Use \"$0 --help\" for details.}"
FIRST_TRACK=${2:-1}
LAST_TRACK=${3:-${FIRST_TRACK}}

FILE_NAME_FORMAT='Track_%03d'
TRANSCODE='vcodec=none,acodec=mp3,ab=192,channels=2,samplerate=44100'

echo "Transcoding tracks from ${FIRST_TRACK} to ${LAST_TRACK}"
echo "Transcoding destination ${DESTINATION_DIR}"

mkdir -p "${DESTINATION_DIR}" || exit

for ((i=${FIRST_TRACK};i<=${LAST_TRACK};++i)); do
  OUTPUT=$(printf "${DESTINATION_DIR}/${FILE_NAME_FORMAT}.mp3" "${i}")
  echo "Creating ${OUTPUT}"
  vlc -I http cdda:///dev/sr0 --cdda-track=${i} \
    ":sout=#transcode{${TRANSCODE}}:std{access=file,dst=${OUTPUT}}" \
    vlc://quit
  echo "Done"
done