#!/bin/sh
#
# remultiplex an mpg file
#   be carefull about possible sound synchonization.
#
def_format=8

help(){
	cat <<END
Usage: $0 [options] <filename.[mpg]>
Option:
    -f n      Output type 1=vcd, 4=svcd, 8=dvd      ($def_format)
    -h        Print this help message
END
	exit 0
}

format=$def_format

while getopts f:h name "$@"
do
    case $name in
f)
    format=$OPTARG ;;
*)
    help ;;
    esac
done
let shiftind=$OPTIND-1
shift $shiftind

case $format
in
8)
	astream=0xBD,0x80 ;;
*)
	astream=0xC0,0x00 ;;
esac

if test "$#" != "1"
then
	help
	exit
fi
case $1 in
*.mpg)
    input="$1"
    base=`echo $input | sed "s/\.mpg$//"` ;;
*)
    help ;;
esac
echo Remultiplexing $input....
sleep 1
soff=`tcprobe -i $input | tail -1 | awk '{ print $2/29.97 + $4/1000 }'`
echo ...offset is $soff seconds...
sleep 1
#tcdemux -x mpeg2 -i $input >$base.m2v
#tcdemux -x ac3 -i $input >$base.m2a
#extract_mpeg2 $input >$base.m2v
#mplayer $input -dumpfile temp-$$.m2a -dumpaudio
mplayer $input -dumpfile $base.m2v -dumpvideo
#mplayer $input -dumpfile $base.m2a -dumpaudio
#mplayer -vc dummy -vo null -ao pcm t003.mpg
#mplayer -vo null -ao pcm t003.mpg
#toolame audiodump.wav $base.m2a
#extract_a52 $input | a52dec -o wav | toolame /dev/stdin $base.m2a
#toolame t002.wav $base.m2a
#mencoder $input -oac pcm -ovc frameno -o temp-$$.wav
mplayer $input -vc dummy -vo null -ao pcm -aofile temp-$$.wav
#mplayer t002.mpg -vo null -oa pcm
#toolame t002.wav $base.m2a
#tcmplex -m d -i $base.m2v -p $base.m2a -o $base-re.mpg
#mpegcat -w temp-$$.m2a,0xC0,0x00 -w $base.m2v,0xE0,0x00 $input >/dev/null
#echo mpegcat -D -w temp-$$.m2a,$astream -w $base.m2v,0xE0,0x00 $input
#mpegcat -D -w temp-$$.m2a,$astream -w $base.m2v,0xE0,0x00 $input >/dev/null
#findmpg temp-$$.m2a $base.m2a
#mpg123 -s temp-$$.m2a | toolame /dev/stdin $base.m2a
#mpg123 -s temp-$$.m2a | mp2enc -r48000 -o $base.m2a
mp2enc -r48000 -o $base.m2a <temp-$$.wav
mplex -O${soff}s -f$format $base.m2v $base.m2a -o $base-re.mpg
rm -f temp-$$.*