musidl/musidl

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#!/bin/bash
# musidl - download music from YouTube
# Copyright (C) 2021 TriMill
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
# check to make sure all commands are available before running
if ! (command -v "yt-dlp" && command -v "jq" && command -v "eyeD3") &>/dev/null; then
>&2 echo "Missing dependencies."
exit 1
fi
# this is printed on -h/--help
helpmsg="Usage: musidl [options]... [url]... (-- [yt-dlp options])
Download music from YouTube using yt-dlp and add ID3v2 metadata automatically
Options:
-h --help Print this message and exit
-v --version Print the version and exit
-q --quiet Only print errors
-f --format <fmt> The audio format to use (default: mp3)
-a --artist <name> Set the artist (default: detect from YouTube)
-A --album <name> Set the album title (default: detect from YouTube)
-t --song <name> Set the song title (default: detect from YouTube)
-g --genre <name> Set the genre (default: none)
-y --year <year> Set the year (default: detect from YouTube)
-T --track <track> Set the track (default: detect from playlist, otherwise none)
-s --show Print information to stdout instead of downloading to file
-o --output Set the template used for filenames. See the yt-dlp documentation for more info
--color <when> Enable or disable colored output. <when> must be always, auto (default), or never
Any arguments after '--' will be sent to yt-dlp directly. These are not officially
supported and some may cause problems."
versionmsg="1.0.0"
# Add a prefix to error messages
function printStderr {
read -r input
[ -n "$input" ] && >&2 echo -e "[$1] $input"
}
urls=() # The list of URLs to download
arg_format="mp3" # The file format (-f/--format)
output_format=()
# Process the arguments
while [[ $# -gt 0 ]]; do
case "$1" in
-h|--help)
echo "$helpmsg"; exit 0 ;;
-v|--version)
echo "musidl $versionmsg"; exit 0 ;;
-q|--quiet)
quiet="true"; shift 1 ;;
-f|--format)
arg_format="$2"; shift 2 ;;
-a|--artist)
i_artist="$2"; shift 2 ;;
-A|--album)
i_album="$2"; shift 2 ;;
-t|--song)
i_song="$2"; shift 2 ;;
-g|--genre)
genre="$2"; shift 2 ;;
-y|--year)
i_year="$2"; shift 2 ;;
-T|--track)
i_track="$2"; shift 2 ;;
-s|--show)
arg_show="true"; shift ;;
-o|--output)
output_format=( "-o" "$2" ); shift 2 ;;
--color)
color_mode="$2"; shift 2 ;;
--)
shift; break ;;
*)
urls+=("$1"); shift ;;
esac
done
case "$color_mode" in
always)
color_enabled="true" ;;
never)
;;
auto|"")
if tput colors &>/dev/null; then
color_enabled="true"
fi ;;
*)
>&2 echo "[musidl] invalid argument for --color: $color_mode" && exit 1
esac
if [ -n "$color_enabled" ]; then
pref_musidl=$"\x1b[32m[musidl]\x1b[0m"
pref_ytdl=$"\x1b[36m[yt-dlp]\x1b[0m"
pref_jq=$"\x1b[35m[jq]\x1b[0m"
errorstr=$"\x1b[31;1mERROR:\x1b[0m"
else
pref_musidl="[musidl]"
pref_ytdl="[yt-dlp]"
pref_jq="[jq]"
errorstr="ERROR:"
fi
# Exit if no URLs are given
[ ${#urls[@]} -eq 0 ] && >&2 echo -e "$pref_musidl $errorstr no URLs provided. Run '$0 --help' for help." && exit 1
ytdl_args=( "$@" )
IFS=$'\n'
# Download metadata from all the URLs
[ -z "$quiet" ] && echo -e "$pref_musidl downloading data..."
data=($(yt-dlp -j "${ytdl_args[@]}" "${urls[@]}" 2> >(printStderr "$pref_ytdl")))
[ -z "$data" ] && >&2 echo -e "$pref_musidl $errorstr yt-dlp returned nothing, exiting" && exit 1
[ -z "$quiet" ] && echo -e "$pref_musidl downloading videos..."
# Download the video,
# Print all errors,
# Add a prefix to the messages,
# And only print messages if quiet is off
if [ -z "$show" ]; then
stdbuf -o0 yt-dlp --no-progress --extract-audio -f bestaudio \
--audio-format="$arg_format" "${ytdl_args[@]}" ${output_format[@]} "${urls[@]}" \
2> >(printStderr "$pref_ytdl") \
| stdbuf -o0 sed -e 's/^/'"$pref_ytdl"' /' \
| ( if [ -z "$quiet" ]; then stdbuf -o0 cat; else cat > /dev/null; fi )
fi
# Get the filenames
filenames=($(yt-dlp --get-filename --extract-audio -f bestaudio --audio-format="$arg_format" "${ytdl_args[@]}" ${output_format[@]} "${urls[@]}"))
# Run for each video to tag
for i in "${!data[@]}"; do
line="${data[i]}"
filename="${filenames[i]%.*}"."$arg_format"
if ! [ -f "$filename" ]; then
>&2 echo -e "$pref_musidl $errorstr failed to find $filename, skipping..."
continue
fi
# Use jq to extract data from the metadata. The following options are considered in order:
# Artist: artist, channel name
# Album: album, playlist name, none
# Song name: track, video title
# Year: release year, upload date
# Track number: playlist index, none
# Video URL
readarray -t songdata <<< "$(echo "$line" | jq -r \
'if .artist then .artist else .channel end, if .album then .album else if .playlist_title then .playlist_title else "" end end, if .track then .track else .title end, if .release_year then .release_year else .upload_date end, if .playlist_index then .playlist_index else "" end, .webpage_url' \
2> >(printStderr "$pref_jq"))"
[ "${#songdata[@]}" -eq 0 ] && >&2 echo -e "$pref_musidl $errorstr could not parse JSON, skipping" && continue
# If arguments are set manually prefer them, otherwise use ones from YouTube
if [ -n "$i_artist" ]; then artist="$i_artist"; else
artist="${songdata[0]}"
fi
if [ -n "$i_album" ]; then album="$i_album"; else
album="${songdata[1]}"
fi
if [ -n "$i_song" ]; then title="$i_song"; else
title="${songdata[2]}"
fi
if [ -n "$i_year" ]; then year="$i_year"; else
year="$(echo "${songdata[3]}" | head -c 4)"
fi
if [ -n "$i_track" ]; then track="$i_track"; else
track="${songdata[4]}"
fi
url="${songdata[5]}"
# If -s/--show is passed, show the data and continue
if [ -n "$arg_show" ]; then
echo "URL: $url"
[ -n "$artist" ] && echo "Artist: $artist"
[ -n "$album" ] && echo "Album: $album"
[ -n "$title" ] && echo "Title: $title"
[ -n "$genre" ] && echo "Genre: $genre"
[ -n "$year" ] && echo "Year: $year"
[ -n "$track" ] && echo "Track: $track"
continue
fi
[ -z "$quiet" ] && echo -e "$pref_musidl tagging $title - $artist ($url)"
[ -n "$artist" ] && eyeD3 --artist "$artist" "$filename" --encoding utf8 >/dev/null
[ -n "$album" ] && eyeD3 --album "$album" "$filename" --encoding utf8 >/dev/null
[ -n "$title" ] && eyeD3 --title "$title" "$filename" --encoding utf8 >/dev/null
[ -n "$genre" ] && eyeD3 --genre "$genre" "$filename" --encoding utf8 >/dev/null
[ -n "$year" ] && eyeD3 --release-year "$year" "$filename" >/dev/null
[ -n "$track" ] && eyeD3 --track "$track" "$filename" >/dev/null
done
[ -z "$quiet" ] && echo -e "$pref_musidl done!"