#!/bin/sh -e

if [ $# -le 1 ]
  then
    printf "This script will take two variables and convert all audio files of the first format to the second, using ffmpeg. \n"
elif [ $# -ge 3 ]
  then
    printf "You've entered too many variables. We only need two... did you not check the help? \n"
 else
    i=`ls | grep $1 | wc -l`
    p=1

    mkdir $2

    while [ $p -le $i ]
      do
          x=`ls | sed "$p!d"`
          y=`printf "$x" | sed "s/$1/$2/"`
          yes | ffmpeg -i "$x" "$y"
          mv "$y" $2/
        p=$(( $p + 1 ))
      done
fi