dotfiles/scripts/yt-dlp-audio.sh

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#!/bin/bash
### Script for downloading albums from Youtube Music ##########
### Usage: ./yt-music-album-download.sh <youtube music url> ###
# - Converts to MP3 from the best quality audio feed
# - Adds track number, album, artist, title, and release year into id3 tags
# - Adds album art embedded thumbnails
echo "Retrieving album information..."
# Downloading the json data of the first track only
jsondata=`yt-dlp -j --playlist-items 1 $1`
# Grabbing the "release_year" and "release_date" and comparing which is lowest integer.
# Sometimes Youtube Music doesn't even populate the "release_date" field, but when it does we need to compare it to "release_year"
# If both the "release_date" and "release_year" exist, check which one is the lower integer, and that should be the actual album release year.
jq_release_year_1=`echo $jsondata | jq -r '.release_year'`
jq_release_date=`echo $jsondata | jq -r '.release_date'`
if [ $jq_release_date != 'null' ]; then
jq_release_year_2=${jq_release_date::-4};
year=$((jq_release_year_1<jq_release_year_2?jq_release_year_1:jq_release_year_2));
else
year=$jq_release_year_1;
fi
# Grabbing the artist then removing any superfluous information after the first comma. Some artists put every band memember into the artist field.
jq_artist=`echo $jsondata | jq -r '.artist'`
artist=${jq_artist%%,*}
echo "Album information retrieved..."
# Pass to yt-dlp and begin download all the music!
yt-dlp --ignore-errors \
--format "(bestaudio[acodec^=opus]/bestaudio)/best" \
--extract-audio \
--audio-format mp3 \
--audio-quality 0 \
--parse-metadata "playlist_index:%(track_number)s" \
--parse-metadata ":(?P<webpage_url>)" \
--parse-metadata ":(?P<synopsis>)" \
--parse-metadata ":(?P<description>)" \
--add-metadata \
--postprocessor-args "-metadata date='${year}' -metadata artist=\"${artist}\"" \
--embed-thumbnail \
--ppa "EmbedThumbnail+ffmpeg_o:-c:v mjpeg -vf crop=\"'if(gt(ih,iw),iw,ih)':'if(gt(iw,ih),ih,iw)'\"" \
-o "%(playlist_index)s. %(title)s.%(ext)s" "$1"