#!/bin/bash

while getopts "o:t:h" opt; do
	case $opt in
		h )	echo 'usage: remux -t tempdir -o ouputdir [-h] file1 [file2...]'
			exit 0 ;;
		o )	outdir=$OPTARG;;
		t )	tmpdir=$OPTARG;;
	esac
done

if [ "$outdir" = "" ]
then
	outdir=`pwd`
fi

if [ "$tmpdir" = "" ]
then
	tmpdir="/tmp"
fi

shift $(($OPTIND - 1))

until [ -z "$1" ]  # Until all parameters used up . . .
do

	filename=$1
	echo remuxing "$filename"
	basename=`basename "$filename"`
	basename=${basename%.*}

	dstfile=$outdir/$basename.mpg

	projectx -demux -out "$tmpdir" "$filename" >> "$tmpdir/remux.log" 2>> "$tmpdir/remux.log"

	if [ $? -eq 0 ]
	then

		echo Finding largest audio file. >> "$tmpdir/remux.log"
		largestfilesize=0
		largestfile="nothing"

		for i in $tmpdir/*mp2
		do
	        	currentfilesize=$(stat -c%s "$i")

		        if (( $currentfilesize > $largestfilesize ))
	                then
				echo $i is bigger than $largestfile. Updating largest file. >> "$tmpdir/remux.log"
				largestfile="$i"
        	                largestfilesize=$currentfilesize
			else
				echo $i is smaller than $largestfile. Doing nothing. >> "$tmpdir/remux.log"
                	fi
	
		done

		mplex -f 8 -o "$dstfile" "$tmpdir/$basename.m2v" "$largestfile" >> "$tmpdir/remux.log" 2>> "$tmpdir/remux.log"

		if [ $? -eq 0 ]
		then
			rm -f "$tmpdir/$basename"*
			rm -f "$tmpdir/remux.log"
		else
			echo mplex failed! >> "$tmpdir/remux.log"
			echo remux of "$filename" failed >&2 
			rm -f "$tmpdir/$basename"*
			mv "$tmpdir/remux.log" "$tmpdir/$filename.log"
		fi
	else
		echo projectx failed! >> "$tmpdir/remux.log"
		echo remux of "$filename" failed >&2
		rm -f "$tmpdir/$basename"*
		mv "$tmpdir/remux.log" "$tmpdir/$filename.log"
	fi
	
	shift
done