ncmpcpp_cover_art.sh

#!/bin/sh
# Cover art script for ncmpcpp-ueberzug

# SETTINGS
music_library="$HOME/Music"
fallback_image="$HOME/.ncmpcpp/img/fallback.png"

# ==== Main functions =========================================================

#kill_previous_instances() {
#    script_name=$(basename "$0")
#    for pid in $(pidof -x "$script_name"); do
#	if [ "$pid" != $$ ]; then
#	    kill -15 "$pid"
#	fi
#    done
#}
main() {
    find_cover_image        >/dev/null 2>&1
}

find_cover_image() {

    # First we check if the audio file has an embedded album art
    ext="$(mpc --format %file% current | sed 's/^.*\.//')"
    if [ "$ext" = "flac" ]; then
        # since FFMPEG cannot export embedded FLAC art we use metaflac
        metaflac --export-picture-to=/tmp/mpd_cover.jpg \
            "$(mpc --format "$music_library"/%file% current)" &&
            cover_path="/tmp/mpd_cover.jpg" && return
    else
        ffmpeg -y -i "$(mpc --format "$music_library"/%file% | head -n 1)" \
            /tmp/mpd_cover.jpg &&
            cover_path="/tmp/mpd_cover.jpg" && return
    fi

    # If no embedded art was found we look inside the music file's directory
    album="$(mpc --format %album% current)"
    file="$(mpc --format %file% current)"
    album_dir="${file%/*}"
    album_dir="$music_library/$album_dir"
    found_covers="$(find "$album_dir" -type d -exec find {} -maxdepth 1 -type f \
    -iregex ".*/.*\(${album}\|cover\|folder\|artwork\|front\).*[.]\\(jpe?g\|png\|gif\|bmp\)" \; )"
    cover_path="$(echo "$found_covers" | head -n1)"
    if [ -n "$cover_path" ]; then
        return
    fi

    # If we still failed to find a cover image, we use the fallback
    if [ -z "$cover_path" ]; then
        cover_path=$fallback_image
    fi
}

main