Splits an audio file based on timestamps in a cuesheet

split_music_compilation.sh

#!/bin/bash
# Splits an audio file based on timestamps in a cuesheet
split_music_compilation() {
    [[ -f $1 ]] || { echo 'Audio file not found:' "$1"; return 1; }
    [[ -f $2 ]] || { echo 'Cuesheet file not found:' "$2"; return 1; }
    local source=$1 cuesheet=$2 count=0 pstamp='0:00' stamp title album
    while read -r line; do
        [[ $line =~ ([0-9]+:[0-9]+:[0-9]+).-.(.*).\[(.*)\] ]] && {
            stamp=${BASH_REMATCH[1]}
            title=${BASH_REMATCH[2]}
            album=${BASH_REMATCH[3]}
            [[ count -gt 0 ]] && nice -n 19 ionice -c 3 ffmpeg -i "$source" -ss "$pstamp" \
                -t $(($(date -d "$stamp" +%s)-$(date -d "$pstamp" +%s))) -c copy -v 0 \
                "$(printf '%02d - %s [%s].%s' "$count" "$ptitle" "$palbum" "${source##*.}")" &
            ((count++))
            pstamp=$stamp
            ptitle=$title
            palbum=$album
        }
    done < "$cuesheet"
    nice -n 19 ionice -c 3 ffmpeg -i "$source" -ss "$pstamp" -c copy -v 0 \
        "$(printf '%02d - %s [%s].%s' "$count" "$title" "$album" "${source##*.}")"
    return 0
}

The accompanying cue sheet should be in the format below:

00:00 - Track Title [Album Title]
01:30 - Next Track [Album Title]
...

The regex can be adapted to handle other name formats.