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Create a split album script in Oil
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Gabriel Arazas
parent
90be31cc52
commit
37036a1e2c
222
bin/split-album
Executable file
222
bin/split-album
Executable file
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#!/usr/bin/env oil
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# The following are the dependencies for this script.
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#
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# * Oil shell v0.8.8
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# * coreutils v8.32
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# * file 5-32
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# * ffmpeg v4.3.1
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# * ripgrep v12.1.1 with SIMD runtime
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shopt --set strict:all
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const show_help = "A small script for splitting files into tracks, perfect for full album releases and audiobooks.
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split-album [options...] -tf \$TIMESTAMP_FILE -af \$ALBUM_FILE
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Options:
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-h, --help Show the help section.
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--descriptive-help Show a helpful tutorial-esque description of the program.
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-af, --audio-file [file] Set the audio file to be split.
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-tf, --timestamp-file [file] Set the timestamp file to be used for splitting.
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-t, --title [title] Set the title of the album.
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-d, --date [date] Set the publication date of the album.
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-a, --author [author] Set the author of the album.
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--json Print the JSON data for use with other applications.
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--strict Set to be strict, exiting when an invalid timestamp is encountered.
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Environment variables:
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EXTENSION The extension to be used. This is used in conjunction with FFmpeg
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where it can detect the codec to be converted automatically with it.
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When any of the required metadata is missing (i.e., title, date, author), it will be prompted.
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"
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const show_descriptive_help = "Split an album with a timestamp file.
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The timestamp file contains a starting timestamp (any format that ffmpeg accepts in seeking but it is recommended in HH:MM:SS) and the title of the chapter/track.
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For more information, see https://trac.ffmpeg.org/wiki/Seeking.
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Lines starting with '#' and empty lines will be ignored.
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The following is an example of the content of a timestamp file.
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\`\`\`
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00:00:00 Introduction
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00:03:54 It's the R-rated scene
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00:05:43 Boring exposition at the cafe
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00:16:54 Expedition time
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00:21:51 Fighting time
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00:22:22 Shower scene
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\`\`\`
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You can also create a timestamp file in JSON format.
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It is the equivalent of '.chapters' from the JSON output (i.e., '--json').
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The equivalent JSON of the previous example would be this:
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\`\`\`
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[
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{
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\"timestamp\": \"00:00:00\",
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\"title\": \"Introduction\"
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},
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{
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\"timestamp\": \"00:03:54\",
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\"title\": \"It's the R-rated scene\"
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},
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{
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\"timestamp\": \"00:05:43\",
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\"title\": \"Boring exposition at the cafe\"
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},
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{
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\"timestamp\": \"00:16:54\",
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\"title\": \"Expedition time\"
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},
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{
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\"timestamp\": \"00:21:51\",
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\"title\": \"Fighting time\"
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},
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{
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\"timestamp\": \"00:22:22\",
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\"title\": \"Shower scene\"
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}
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]
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\`\`\`
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There will be a folder created with the safe name of the album (in kebab-case) containing the split tracks.
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The original file will be kept, do what you want with it.
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"
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const EXTENSION = ${EXTENSION:-"ogg"}
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var audio_file = ''
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var timestamp_file = ''
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var album = ''
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var author = ''
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var pub_date = ''
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var prints_json = false
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var strict_mode = false
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while test $len(ARGV) -gt 0 {
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case $[ARGV[0]] {
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-h|--help)
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write -- $show_help
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exit
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;;
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--descriptive-help)
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write -- $show_descriptive_help
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exit
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;;
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-af|--audio-file)
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set audio_file = $2
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shift 2
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;;
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-tf|--timestamp-file)
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set timestamp_file = $2
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shift 2
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;;
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-a|--author)
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set author = $2
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shift 2
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;;
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-d|--date)
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set pub_date = $2
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shift 2
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;;
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-t|--title)
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set album = $2
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shift 2
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;;
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--strict)
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set strict_mode = true
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shift
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;;
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--json)
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set prints_json = true
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shift
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;;
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*)
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shift
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;;
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}
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}
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proc warnf(msg, @args) {
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>&2 printf "${msg}\\n" @args
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}
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proc errorf(msg, @args) {
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>&2 printf "${msg}\\n" @args
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exit 1
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}
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proc prompt(msg, :out, prefix = ">> ") {
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>&2 printf '%s\n%s' $msg $prefix
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read --line
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setref out = $_line
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}
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proc kebab-case(word) {
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write -- $word | sed --regexp-extended --expression 's/./\L&/g' --expression 's/\s+/-/g' --expression 's/[^.a-z0-9-]//g' --expression 's/^-+|-+$//g' --expression 's/-+/-/g'
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}
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test -f $audio_file || errorf '%s is not a regular file' $audio_file
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test -f $timestamp_file || errorf '%s is not a regular file' $timestamp_file
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test $album || prompt "What is the title of the album?" :album
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test $author || prompt "Who is the author of the album?" :author
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test $pub_date || prompt "When is the album published?" :pub_date
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const output_data = {}
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set output_data['file'] = $audio_file
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set output_data['chapters'] = []
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const timestamp_regex = / %start digit{2,} ':' digit{2} ':' digit{2} %end /
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var has_error = false
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# Also cleans up the timestamp file with comments and empty lines.
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# I just want to improve the timestamp format (a little bit).
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case $(file --mime-type --brief $timestamp_file) {
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"application/json")
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json read :output_data['chapters'] < $audio_file
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;;
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"text/plain")
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cat $timestamp_file | sed --regexp-extended --expression '/^\s*$/d' --expression '/^#/d' | while read --line {
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var chapter = {}
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set chapter['title'] = $(write -- $_line | cut -d' ' -f2-)
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set chapter['timestamp'] = $(write -- $_line | cut -d' ' -f1)
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write -- ${chapter['timestamp']} | rg --quiet $timestamp_regex || {
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warnf "'%s' %s is not a valid timestamp" ${chapter['timestamp']} ${chapter['title']}
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set has_error = true
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continue
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}
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_ output_data['chapters'].append(chapter)
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}
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;;
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}
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if (strict_mode and has_error) { exit 1 }
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const title_slug = $(kebab-case $album)
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mkdir -p $title_slug
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const chapter_len = len(output_data['chapters'])
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for index in @(seq $[chapter_len]) {
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set chapter = output_data['chapters'][Int(index) - 1]
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var start = chapter['timestamp']
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var end = output_data['chapters'][Int(index)]['timestamp'] if Int(index) != chapter_len else null
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var filename = $(printf "%s/%.2d-%s.%s" $title_slug $index $(kebab-case ${chapter['title']}) $EXTENSION)
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warnf "[%d/%d] %s\\r" ${index} ${chapter_len} ${chapter['title']}
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if (Int(index) != chapter_len) {
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ffmpeg -loglevel quiet -nostdin -i $audio_file -ss $start -to $end $filename
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} else {
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ffmpeg -loglevel quiet -nostdin -i $audio_file -ss $start $filename
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}
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}
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if (prints_json) { json write :output_data }
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