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#!/bin/sh
set -eu -o pipefail
MUSIC_DIR=/nfs/media/music
MP3_BITRATE=320k
# Searches the given argument paths for .flac files, and copies them to
# $MUSIC_DIR with the follow hierarchy:
#
# flac/${artist}/${album}/${tracknum} ${trackname}.flac
#
# It also transcodes the FLACs to MP3s and stores them in a similar way:
#
# mp3/${artist}/${album}/${tracknum} ${trackname}.flac
#
# The metadata is taken from the id3 tags in the flac file, santized to contain
# only ASCII characters.
sanitize(){
echo "$1" | tr -Cd 'A-Za-z0-9 _-'
}
if [ $# -ne 0 ] ; then
echo 'usage: import.sh PATH...' 1>&2
exit 1
fi
find "$@" -iname '*.flac' -type f -print | while read -r file; do
track=$(exiftool -s3 -TrackNumber "$file")
title=$(exiftool -s3 -Title "$file")
album=$(exiftool -s3 -Album "$file")
artist=$(exiftool -s3 -AlbumArtist "$file")
artist=${artist:-$(exiftool -s3 -Artist "$file")}
if [ -z "$artist" ]; then
echo "$file has no artist metadata, skipping" 1>&2
continue
fi
if [ -z "$album" ]; then
echo "$file has no album metadata, skipping" 1>&2
continue
fi
if [ -z "$title" ]; then
echo "$file has no title metadata, skipping" 1>&2
continue
fi
if [ -z "$track" ]; then
echo "$file has no track metadata, skipping" 1>&2
continue
fi
subpath="$(sanitize "$artist")/$(sanitize "$album")"
basename="$(printf '%03d' "$(expr "$track" + 0)") $(sanitize "$title")"
# flac
mkdir -p "${MUSIC_DIR}/flac/${subpath}"
cp "$file" "${MUSIC_DIR}/flac/${subpath}/${basename}.flac"
echo "flac :: $artist / $album / $title"
if ! [ -f "${MUSIC_DIR}/flac/${subpath}/folder.jpg" ]; then
ffmpeg -y -nostdin -loglevel error -i "$file" -an -c:v copy "${MUSIC_DIR}/flac/${subpath}/folder.jpg"
echo "aart :: $artist / $album"
fi
# mp3
mkdir -p "${MUSIC_DIR}/mp3/${subpath}"
ffmpeg -y -nostdin -loglevel error -i "$file" -ab "${MP3_BITRATE}" "${MUSIC_DIR}/mp3/${subpath}/${basename}.mp3"
echo " mp3 :: $artist / $album / $title"
done
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