#! /bin/sh

if [ -z "$1" ]; then
   echo "Usage: $0 input.avi [output.avi]"
   exit 1
fi

if [ -z "$2" ]; then
   output="`basename $1`"
else
   output="$2"
fi

exec mencoder -ovc copy -oac mp3lame "$1" -o "$output"