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#!/bin/sh
err() { echo "Usage:
tag [OPTIONS] file
Options:
-a: artist/author
-t: song/chapter title
-A: album/book title
-n: track/chapter number
-N: total number of tracks/chapters
-d: year of publication
-g: genre
-c: comment
You will be prompted for title, artist, album and track if not given." && exit 1 ;}
while getopts "a:t:A:n:N:d:g:c:" o; do case "${o}" in
a) artist="${OPTARG}" ;;
t) title="${OPTARG}" ;;
A) album="${OPTARG}" ;;
n) track="${OPTARG}" ;;
N) total="${OPTARG}" ;;
d) date="${OPTARG}" ;;
g) genre="${OPTARG}" ;;
c) comment="${OPTARG}" ;;
*) printf "Invalid option: -%s\\n" "$OPTARG" && err ;;
esac done
shift $((OPTIND - 1))
file="$1"
temp="$(mktemp -p "$(dirname "$file")")"
trap 'rm -f $temp' HUP INT QUIT TERM PWR EXIT
[ ! -f "$file" ] && echo 'Provide file to tag.' && err
[ -z "$title" ] && echo 'Enter a title.' && read -r title
[ -z "$artist" ] && echo 'Enter an artist.' && read -r artist
[ -z "$album" ] && echo 'Enter an album.' && read -r album
[ -z "$track" ] && echo 'Enter a track number.' && read -r track
cp -f "$file" "$temp" && ffmpeg -i "$temp" -map 0 -y -codec copy \
-metadata title="$title" \
-metadata album="$album" \
-metadata artist="$artist" \
-metadata track="${track}${total:+/"$total"}" \
${date:+-metadata date="$date"} \
${genre:+-metadata genre="$genre"} \
${comment:+-metadata comment="$comment"} "$file"
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