Converts the given video file to an audio one.

2mp3.sh

#!/bin/sh

case $# in
   1)
      FROM="$1"
      TO="$1"
      ;;
   2)
      FROM="$1"
      TO="$2"
      ;;
   *)
      echo "Usage: $0 <from-folder-or-file> <optional:to-folder-or-file>"
      exit 1
      ;;
esac

IFS=''

if ! [ -e "$FROM" ]
then
   echo "The source path is invalid: $FROM"
   exit 2
elif [ -d "$FROM" ]
then
   FROM=$FROM/*.*
   if ! [ -d "$TO" ]
   then
      echo "The destination file does not exists: $TO"
      exit 3
   fi
elif [ -f "$FROM" ]
then
   FROM=$FROM
   if [ -e "$TO" -a -d "$TO" ]
   then
      TO="$TO$(basename $FROM)"
   fi
fi

for FILE in $FROM
do
   SIMPLE_FILE="$(basename $FILE)"
   EXTENSION="${SIMPLE_FILE##*.}"
   FILENAME="${SIMPLE_FILE%.*}"

   echo '------------'
   ffmpeg -i "$FILE" -vn  -acodec libmp3lame -ac 2 -ab 320k -ar 48000 "$TO/$FILENAME.mp3"
   echo '------------'
done

unset IFS