#!/bin/bash
lsdvd >> lsdvd.tmp
TRACK=`grep Longest lsdvd.tmp | cut -c 16-17`
LENGTH=`grep "Title: 0$TRACK" lsdvd.tmp | cut -c 19-27`
echo $LENGTH > length.tmp
hour=`cut -c 2-2 length.tmp`
min=`cut -c 4-5 length.tmp`
sec=`cut -c 7-8 length.tmp`
TOTAL_SECONDS=$(( $hour*3600 + $min*60 + $sec ))
FILENAME=$1
FINALSIZE=$2
FINALKBSIZE=$(($FINALSIZE*1000))
AUDIOSIZE=$(($TOTAL_SECONDS*24))
DIFFERENCE=$(($FINALKBSIZE - $AUDIOSIZE))
RATE=$((($DIFFERENCE*8) / $TOTAL_SECONDS))
echo -e "Title: $FILENAME"
echo -e "Longest track on DVD: $TRACK"
echo -e "Length: $LENGTH"
echo -e "Number of seconds: $TOTAL_SECONDS"
echo -e "Rate is $RATE kbps"
echo -e "An mpeg named $FILENAME, of final size $FINALSIZE MB and length $TOTAL_SECONDS seconds is going to be created in 10 sec.\nI hope you know what the fuck you're doing..." 
sleep 10
mplayer dvd://$TRACK -dumpstream -dumpfile $FILENAME
mencoder $FILENAME -oac lavc -ovc lavc -of mpeg -mpegopts format=dvd -aid 128 -vf scale=720:480,harddup \
-srate 48000 -lavcopts acodec=ac3:abitrate=192:vcodec=mpeg2video:keyint=25:trell:mbd=2:\
vbitrate=$RATE:aspect=16/9:threads=2 -ofps 30000/1001 -o $FILENAME.mpg
rm lsdvd.tmp
rm length.tmp
exit