#!/bin/bash

#
# (c) 2002 by Killer
#
# version 0.4  
#
# 20/09/2002: added autocrop functionality!
# 01/10/2002: improved resolution rescaling
# 09/10/2002: improved audio track grabbing
#
# If you have any comments, critics, suggestions, etc..., 
# send me an e-mail.
# Thanks to the MPlayer developers for this great software and to
# Patrick J. Volkerding for his "pkgtool" that inspired me.
#
# This script is free software; you can redistribute and/or
# modify it under the terms of the GNU General Public
# License as published by the Free Software Foundation. 
#
# This script is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY. 
# See the GNU General Public License for more details.
# You should have received a copy of that along with this
# software, if not refer to: http://www.fsf.org/licenses/gpl.txt
#

#
# README:
#
# Pay attention to have write permission on /tmp directory
# and necessary rights to execute system shutdown (if not use sudo).
#
# Don't forget to edit your cdburner settings 8 lines below.
#
# That's all.
# Happy encoding!
#

# Specify your cdburner settings:
CDR_DEVICE=/dev/scd1
CDR_SPEED=4
CDR_ID=0,1,0

dialog --backtitle "MencTool 0.4" --menu "How many cds (700 Mb) would you use?" 9 51 2 1 "one cd (recommended)" 2 "two cd's (if movie is longer than 150 min)" 2>/tmp/f;

SPACE=`cat /tmp/f`

# Creates the summary file
echo "Cd number: `echo $SPACE`" > /tmp/summary;

# Avi final size
SPACE=`expr $SPACE \* 690 \* 8192`

dialog --backtitle "MencTool 0.4" --inputbox "Which track would you encode?" 9 30 1 2>/tmp/f;

TRACK=`cat /tmp/f`

dialog --backtitle "MencTool 0.4" --inputbox "Insert total movie time (minutes):" 9 30 2>/tmp/f;

TIME=`cat /tmp/f`

# Conversion from minutes to seconds
TIME=`expr $TIME \* 60`

dialog --backtitle "MencTool 0.4" --menu "Select audio bitrate:" 11 30 4 64 "Kbit/s" 96 "Kbit/s" 112 "Kbit/s" 128 "Kbit/s" 2>/tmp/f;

A_BITRATE=`cat /tmp/f` 

# Finds audio track size
AUDIO=`expr $A_BITRATE \* $TIME`

# Finds video bitrate
BITRATE=`expr $SPACE - $AUDIO`
BITRATE=`expr $BITRATE / $TIME`

# If video bitrate is major than 6000 sets it to 6000 Kbit/s
if [ $BITRATE -gt 6000 ]
	then BITRATE=6000
fi

dialog --backtitle "MencTool 0.4" --menu "Select audio language:" 12 30 5 "en" english "it" italian "fr" french "de" german "hu" hungarian 2>/tmp/f

LANGUAGE=`cat /tmp/f`

dialog --backtitle "MencTool 0.4" --menu "Select horizontal resolution:" 14 30 4 720 "(original)" 640 "" 480 "" 360 "" 2>/tmp/f;

RESOLUTION=`cat /tmp/f` 

dialog --backtitle "MencTool 0.4" --inputbox "Insert .avi file name:" 9 30 .avi 2>/tmp/f;

FILENAME=`cat /tmp/f;`

dialog --backtitle "MencTool 0.4" --yesno "Would you like to burn the movie, after ripping?" 9 30

BURN=$?

if [ $BURN -eq 0 ]
	then eject $CDR_DEVICE;
	     dialog --backtitle "MencTool 0.4" --msgbox "Insert a 700 Mb Cd-R..." 9 30;
fi

dialog --backtitle "MencTool 0.4" --yesno "Would you like to shutdown the system, finally?" 8 30

# Variabile verified at the end of script for shutdown
HALT=$? 

# Appends rip settings to summary file
echo "Selected track: `echo $TRACK`" >> /tmp/summary;
echo "Video bitrate : `echo $BITRATE` Kbit/s" >> /tmp/summary;
echo "Resolution: `echo $RESOLUTION` pixel" >> /tmp/summary;
echo "Audio bitrate : `echo $A_BITRATE` Kbit/s" >> /tmp/summary;
echo "Language: `echo $LANGUAGE`" >> /tmp/summary;

dialog --backtitle "MencTool 0.4" --textbox /tmp/summary 11 31 
rm -f /tmp/summary;

clear;

cd;

# Start time log
date > time.txt;

rm -f frameno.avi lavc_stats.txt divx2pass.log;

# Detects crop value to cut black bands
mencoder -dvd $TRACK -chapter 2 -endpos 5 -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=$BITRATE:keyint=50:vhq -vop cropdetect,scale -zoom -xy $RESOLUTION -sws 2 -oac copy -o /dev/null | grep vop | tail -n 1 | cut -d "=" -f 2 | tr -d ')' > /tmp/f;

CROP=`cat /tmp/f`

# Detects audio track number
mencoder -dvd $TRACK -v | grep "$LANGUAGE aid" | cut -d ":" -f 5 | tr -d ' ' > /tmp/f;

AUDIOT=`cat /tmp/f; rm -f /tmp/f`

# Save on disc selected track. If you don't have enough disk space 
# comment this line and edit the three passes removing 'cat TEMP.VOB |'
# and using 'mencoder -dvd $TRACK ...'; remember to also remove the '-'.
mencoder -dvd $TRACK -ovc copy -oac copy -aid $AUDIOT -o TEMP.VOB;

# First pass: audio compression 
cat TEMP.VOB | mencoder - -ovc frameno -oac mp3lame -lameopts br=$A_BITRATE:cbr:vol=3 -o frameno.avi;

# Second pass: video compression first pass 
cat TEMP.VOB | mencoder - -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=$BITRATE:keyint=50:vhq:vpass=1 -vop crop=$CROP,scale -zoom -xy $RESOLUTION -sws 2 -oac copy -o /dev/null; 

# Third pass: video compression second pass while adding compressed audio
cat TEMP.VOB | mencoder - -ovc lavc -lavcopts vcodec=mpeg4:vbitrate=$BITRATE:keyint=50:vhq:vpass=2 -vop crop=$CROP,scale -zoom -xy $RESOLUTION -sws 2 -oac copy -o $FILENAME;

# Delete temporary files
rm -f frameno.avi TEMP.VOB;

# End time log
date >> time.txt

# Burns the movie
if [ $BURN -eq 0 ]
	then mkisofs -J -l -V "$FILENAME" $FILENAME | cdrecord -v dev=$CDR_ID speed=$CDR_SPEED -data -
fi

# System shutdown using sudo (for non privileged users)
if [ $HALT -eq 0 ]
	then sudo halt
fi