#!/bin/sh

# Author: Jonas Jermann
# Description: A hack to allow mencoder to encode from an audio only file

if [[ $1 == "" ]]; then
    echo "Usage: $0 <\"input file\"> <\"output file\"> <\"options\">"
    exit 0
fi

if [[ $3 == "" ]]; then
    options="-oac lavc -lavcopts acodec=mp3:abitrate=192"
else
    options=$3
fi
 
mencoder -rawvideo on:w=1:h=1 -ovc copy -of rawaudio -endpos `mplayer -identify $1 -frames 0 2>&1 | grep ID_LENGTH | cut -d "=" -f 2` -audiofile $1 -o $2 $options $1
