Extract Audio (start, end) Based on File

cut.sh

# Example video.txt — The script will use pipe | as it's delimiter
# https://www.youtube.com/watch?v=iUDURCrvrMI|00:02:02|00:03:41|1
# URL | START | END | Filename

# You'll need:
# - youtube-dl brew install youtube-dl
# - ffmpeg brew install ffmpeg

for i in $(<video.txt);
do
    URL=`echo $i | cut -d "|" -f 1`;
    START=`echo $i | cut -d "|" -f 2`;
    END=`echo $i | cut -d "|" -f 3`;
    FILE=`echo $i | cut -d "|" -f 4`;

    SEC1=`echo $START | sed 's/^/((/; s/:/)*60+/g' | bc`
    SEC2=`echo $END | sed 's/^/((/; s/:/)*60+/g' | bc`

    DIFFSEC=`expr ${SEC2} - ${SEC1}`

    ffmpeg $(youtube-dl -g $URL | sed "s/.*/-ss $START -i &/") -t $DIFFSEC -c copy $FILE".mkv";
    ffmpeg -i $FILE".mkv" -f mp3 -ab 192000 -vn $FILE".mp3";
    rm $FILE".mkv";
done;