#!/bin/sh
REC=0
if [[ "$1" == "-r" ]];
then
    shift;
    [[ ! -d "$1" ]] \
    && echo "Recursive mode argument must be a directory" \
    && exit -1

    find "$1" -type f -exec $0 {} \;
else
    IN="$1";
    [[ ! -f "$IN" ]] && echo "$IN is not a file. Skipping." && exit -1;
    OUT=${2:-$(echo "$1"|sed 's/\.[^\.]*$/\.mp3/')}
    [[ -e "$OUT" ]] && echo "$OUT already exists. Skipping." && exit -1;
    echo "$IN -> $OUT";
    ffmpeg -i "$IN" -vn -ar 44100 -ac 2 -ab 192k -f mp3 "$OUT" > /dev/null 2>&1;
fi
exit 0