#!/bin/sh
# see http://www.cscs.ch/~mvalle/mencoder/mencoder.html

# touch ~/.mplayer/mencoder #

JPEG_DIR=Jpgs
MPG_FILE=AtomEye.mpg

jpgfile=`ls $JPEG_DIR/ | grep --max-count=1 -i .jpg`

geometry=`identify -verbose $JPEG_DIR/$jpgfile | grep Geometry | cut -d: -f2`

height=`echo $geometry | cut -dx -f1`
width=`echo $geometry | cut -dx -f2`

optimal_bitrate=`echo "scale=0; 50 * 25 * $width * $height / 256" | bc -l`

rm -f $MPG_FILE

opt="vbitrate=$optimal_bitrate:mbd=2:keyint=132:vqblur=1.0:cmp=2:subcmp=2:dia=2:last_pred=3"

mencoder -ovc lavc -lavcopts vcodec=msmpeg4v2:vpass=1:$opt -mf type=jpg:fps=8 -nosound -o /dev/null mf://$JPEG_DIR/\*.jpg

mencoder -ovc lavc -lavcopts vcodec=msmpeg4v2:vpass=2:$opt -mf type=jpg:fps=8 -nosound -o $MPG_FILE mf://$JPEG_DIR/\*.jpg