#!/bin/bash
#
# mplayer encoding script
#
# Eric Thern
# January 21, 2003
#
#
# mencoder script to encode a two part VCD/SVCD style movie into
# a single divx file, with mp3 audio & in fullscreen mode
#
# Prerequisites:
#
# all movies should be named like this:
# 	'somemovie-part1.mpg' and 'somemovie-part2.mpg'
# this two part naming scheme gets piped into mencoder, 
#	and it will automatically create a single .avi file from it.
# cropdetect runs and takes out the blackspace on top and bottom,
#	which allows you to have, in the end, a full-screen movie
#	which (IMHO) is the best way to watch movies on a computer screen.
#
# You need to have mplayer/mencoder installed, and libmp3lame
# you could use ogg/vorbis instead of mp3lame, in fact that would be neat. do it.
#
#
# Example:
# here is what your directory looks like (names selected randomly):
#
#-rw-rw-r--    1 mplayer  mplayer  833277172 Dec 25 22:22 some.lame.movie-part1.mpg
#-rw-rw-r--    1 mplayer  mplayer  833307384 Dec 25 22:22 some.lame.movie-part2.mpg
#-rw-rw-r--    1 mplayer  mplayer  833260904 Dec 25 22:22 another.lame.movie-part1.mpg
#-rw-rw-r--    1 mplayer  mplayer  833325976 Dec 25 22:22 another.lame.movie-part2.mpg
#-rw-rw-r--    1 mplayer  mplayer  825826428 Dec 25 22:22 another.lame.movie-part3.mpg
#
# You run this script:
# $./mencoder-script
#
# it runs, and you end up with all of the above, plus the following:
#
#-rw-rw-r--    1 mplayer  mplayer  700200100 Dec 26 01:01 some.lame.movie.avi
#-rw-rw-r--    1 mplayer  mplayer  700200100 Dec 26 02:02 another.lame.movie.avi
#
# (or something similar)
#



for i in `ls -1 | grep mpg | awk -F"-part" '{print $1}' | uniq `; 

do

rm -f frameno.avi
rm -f cropdetect

mplayer -ao null -vo null -vop cropdetect -ss 100 $i-part1.mpg > cropdetect &
sleep 5
killall -9 mplayer
sleep 5

CROP=`tail -2 cropdetect | head -1 | awk -F"(" '{print $2}' | awk -F")" '{print $1}'`

#cat $i* | mencoder -o "$i".avi -ovc lavc -lavcopts vcodec=mpeg4:vhq:vbitrate=1800 $CROP -oac mp3lame -lameopts vbr=3 - 

nice -n 19 cat $i* | mencoder -ovc frameno -o frameno.avi $CROP -oac mp3lame -lameopts vbr=3 -
nice -n 19 cat $i* | mencoder -ovc lavc -lavcopts vcodec=mpeg4:vpass=1 $CROP -oac copy -o /dev/null -
nice -n 19 cat $i* | mencoder -ovc lavc -lavcopts vcodec=mpeg4:vpass=2 $CROP -oac copy -o "$i".avi -

rm -f cropdetect

done