#!/bin/bash
vob=`zenity --file-selection`
size=`stat -c %s "$vob"`
twentypercent=`echo $size \* .2 | bc | xargs printf "%1.0f"`
(( twentypercent++ ))
directory=`dirname "$vob"`
outvob="$directory/out.vob"
audiotrack="$directory/audiotrack.txt"
tail -c +$twentypercent "$vob" | head -c 164857600  > "$outvob"
vlc "$outvob"
rm "$outvob"
zenity --entry --text="Please enter the correct audio track number. This must be a digit." --entry-text=1 > "$audiotrack"
track=`cat $audiotrack`
zenity --info --text="You've set the audio track for $vob to $track."