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# Required applications
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* soxi
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* ffmpeg
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# Usage
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```Bash
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get-tracks.sh rip audio-file time-file
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```
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`audio-file` can be in any format understood by `soxi` and `ffmpeg`
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In the `time-file`:
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```
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0:00 First song
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2:20 Second song
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3:18 Awesome song
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```
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# Environment variables
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* SIMULATION [0|1] do not invoke ffmpeg
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* FORMAT [mp3,ogg,opus,…] for the song file format
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* WITH_NUMBER [separator] if not null, write song number with this separator
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example: WITH_NUMBER=_ Song names will be 1_song.opus 2_song.opus (...)
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* QUIET: if set to any value, ffmpeg commands are not displayed
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# More
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Run `get-track.sh` without arguments.
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#!/usr/bin/env sh
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get_time(){
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echo "$*" | sed "s/[ \t].*//"
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}
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get_title(){
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echo "$*" | cut -d ' ' -f 2-
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}
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reverse_word_order(){
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local result=
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for word in $@; do
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result="$word $result"
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done
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echo "$result"
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}
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# bc is mandatory: arythmetic operations are very limited in ash.
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get_seconds(){
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local n=0
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local v=0
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values=$(echo "$*" | sed 's/:/\
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/g' | sed "s/^0//")
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for i in $(reverse_word_order $values); do
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case $n in
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0) v=$(echo "$v + $i " | bc);;
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1) v=$(echo "$v + (60 * $i)" | bc);;
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2) v=$(echo "$v + (3600 * $i)" | bc);;
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*) echo "invalid timecode $*"; exit 1;;
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esac
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n=$((n+1))
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done
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echo $v
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}
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# Get a more usable time representation for the beginning and the end of songs.
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get_values(){
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audio_file="$1"
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time_file="$2"
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total_length=$(soxi -D "${audio_file}" | sed "s/\..*//") # integer values only
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n=0
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while read X; do
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if [ $n -ne 0 ]; then
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to=$(get_time $X)
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to_s=$(get_seconds $to)
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echo -e "$from_s\t$to_s\t$title"
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fi
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#echo $X
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from=$(get_time $X)
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from_s=$(get_seconds $from)
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title=$(get_title $X)
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if [ -z "${WITH_NUMBER}" ]; then
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:
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else
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title="${n}${WITH_NUMBER}${title}"
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fi
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n=$(echo $n + 1 | bc)
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done < "${time_file}"
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echo -e "$from_s\t$total_length\t$title"
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}
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run_ffmpeg(){
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local file=$1
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local from=$2
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local duration=$3
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local title=$4
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if [ "${SIMULATION}" -eq 1 ]; then
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[ -z "${QUIET}" ] && echo "ffmpeg -loglevel error -ss '$from' -t '$duration' -i '${file}' '${title}'"
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else
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[ -z "${QUIET}" ] && echo "ffmpeg -loglevel error -ss '$from' -t '$duration' -i '${file}' '${title}'"
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$(< /dev/null ffmpeg -loglevel quiet -ss "$from" -t "$duration" -i "${file}" "${title}")
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fi
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}
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rip(){
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n=0
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from=0
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to=0
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audio_file="$1"
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time_file="$2"
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[ "$FORMAT" = "" ] && echo "default format: opus" && FORMAT="opus"
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#echo "from to duration title"
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get_values "$audio_file" "$time_file" | while read LINE; do
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from=$(echo $LINE | cut -d ' ' -f 1)
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to=$(echo $LINE | cut -d ' ' -f 2)
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title=$(echo $LINE | cut -d ' ' -f 3-)
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duration=$(echo "$to - $from" | bc)
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run_ffmpeg "${audio_file}" "${from}" "${duration}" "${title}.${FORMAT}"
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n=$((n + 1))
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done
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}
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usage(){
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echo "usage: $0 command"
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echo "command: show <single-file-playlist> <song-list>"
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echo "command: rip <single-file-playlist> <song-list>"
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echo
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echo "song-list line format example: 1:30 My second track of the playlist"
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echo "show output format: start end title"
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echo
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echo "envvar: SIMULATION [0|1] (do not invoke ffmpeg)"
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echo "envvar: FORMAT [mp3,ogg,opus,…] (see the ffmpeg documentation)"
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echo "envvar: WITH_NUMBER [separator] (not null = write song number, with this separator)"
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echo " example: WITH_NUMBER=_ Song names will be 1_song.opus 2_song.opus…"
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echo "envvar: QUIET (if set to any value, ffmpeg commands are not displayed)"
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}
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if [ $# -lt 1 ]; then
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usage
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exit 0
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fi
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command=$1
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shift
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case "x-${command}" in
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x-show)
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# Takes the audio file in first parameter
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if [ $# -ne 2 ]; then
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echo "Usage: $0 show music-file time-stamps-file"
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exit 1
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fi
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get_values "$1" "$2"
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;;
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x-rip)
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# Takes the audio file in first parameter
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if [ $# -ne 2 ]; then
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echo "Usage: $0 show music-file time-stamps-file"
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exit 1
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fi
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rip "$1" "$2"
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;;
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*)
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usage 1>&2
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exit 1
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esac
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