home/.local/share/nnn/plugins/mp3conv

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#!/usr/bin/env sh
# Description: Extract audio from multimedia files and convert to mp3
#
# Dependencies: ffmpeg compiled with libmp3lame audio codec support
#
# Shell: POSIX compliant
# Author: Arun Prakash Jana
outdir=_mp3files
handle_multimedia() {
mime="${1}"
file="${2}"
case "${mime}" in
audio/* | video/*)
ffmpeg -i "${file}" -vn -codec:a libmp3lame -q:a 2 "${outdir}/${file%.*}.mp3"
;;
*)
;;
esac
}
printf "Process 'a'll in directory or 'c'urrent? "
read -r resp
if [ "$resp" = "a" ]; then
if ! [ -e "${outdir}" ]; then
mkdir "${outdir}"
fi
for f in *; do
if [ -f "${f}" ]; then
mimestr="$( file --dereference --brief --mime-type -- "${f}" )"
handle_multimedia "${mimestr}" "${f}"
fi
done
elif [ "$resp" = "c" ] && [ -f "$1" ]; then
ffmpeg -i "${1}" -vn -codec:a libmp3lame -q:a 2 "${1%.*}.mp3"
fi