yt-convert.sh

#!/usr/bin/env bash
#set -x

trap ctrl_c INT

ctrl_c () {
    rm -r "$_tmpdir"
    exit 2
}

_nasdir=/mnt/nshare/Infiniti_music
_urlfile="${_nasdir}/urls.txt"
_failfile="${_nasdir}/fails.txt"
_fileformat='%(title)s.%(ext)s'
_tmpdir=$(mktemp -d)
echo "$_tmpdir"

dos2unix "$_urlfile"

mapfile -t urls < "$_urlfile"

for url in "${urls[@]}"; do
    fails=0
    /usr/local/bin/youtube-dl -o "${_tmpdir}/${_fileformat}" --restrict-filenames -f bestaudio "$url" >/dev/null
    files=($(/usr/local/bin/youtube-dl -o "${_tmpdir}/${_fileformat}" --restrict-filenames -f bestaudio --get-filename "$url"))
    for file in "${files[@]}"; do 
        _mp3="${_nasdir}/tmp/$(basename "${file%.*}").mp3"
        ffmpeg -i "$file" -vn -ab 128k -ar 44100 -y "$_mp3"
        if [[ ! -f "$_mp3" ]]; then
            ((fails++))
        fi
    done
    if ((fails>0)); then
        echo "$url" >> "$_failfile"
    fi
done

rm -r "$_tmpdir"
echo '' > "$_urlfile"

unix2dos "$_urlfile"