#!/bin/bash

function usage ()
{
echo 1>&2
echo "Usage: miff2mpg [-f frames_per_second]" 1>&2
echo "                 [-o outfile.mpg]" 1>&2
echo "                 file.miff" 1>&2
echo 1>&2
echo "  Converts file.miff to file.mpg (or outfile.mpg if -o is given)" 1>&2
echo "  using frames_per_second as framerate (defaults to 25)" 1>&2
echo 1>&2
echo "  Assumes mjpeg tools and \"convert\" (ImageMagick) is installed." 1>&2
echo  1>&2
echo "  file.miff should contain all the frames to be animated. " 1>&2
echo "  $0 does not accept a file list (e.g. file*.miff) as an argument. " 1>&2
echo  1>&2
echo "  This script was originally written by Ulrich Oelmann <Ulrich.Oelmann@iws.uni-stuttgart.de>. " 1>&2
echo "  See http://opendx.npaci.edu/mail/opendx-users/2004.10/msg00026.html" 1>&2
echo  1>&2
exit 0
}

if [ $[$# < 1 ] = 1 ]; then
    usage
fi

FOPTION=25;
OOPTION="";

while getopts "f:o:" OPTION; do
    case $OPTION in
	f) FOPTION=$OPTARG;;
	o) OOPTION=$OPTARG;;
	?) usage;;
    esac
done

shift $[$OPTIND-1]

if [ x"$OOPTION" == "x" ]; then
    OOPTION=`basename $1 .miff`
    OOPTION=`basename $OOPTION .MIFF`
    OOPTION=`dirname $1`/$OOPTION".mpg"
fi

TMPDIR=`mktemp -d miff2xvid.XXXXXXXXXX`
mkdir -p $TMPDIR

declare -i FRAMES X Y

echo "######### Analyzing $1"

IDENTIFY=`identify -format "%n %w %h" $1 | \
    tail -n 2 | head -n 1`
FRAMES=`echo $IDENTIFY | gawk '{ print $1 }'`
X=`echo $IDENTIFY | gawk '{ print $2 }'`
Y=`echo $IDENTIFY | gawk '{ print $3 }'`

FRAMES=$(( FRAMES-1 ))

echo "######### Extracting $(( FRAMES+1 )) frames out of $1"

convert -quality 9 $1 $TMPDIR/frame.ppm

echo "######### Encoding animation to $OOPTION"
echo

ppmtoy4m -F $FOPTION:1 $TMPDIR/frame.ppm | mpeg2enc -o $OOPTION --video-bitrate 1151 --format 3 --motion-search-radius 32 --no-constraints

#echo "######### Extracting $(( FRAMES+1 )) frames out of $1"#
#
#convert -quality 9 $1 $TMPDIR/frame.png
#
#NUMFMT='%06d'
#for ZAHL in `seq 0 $FRAMES`; do
#  FNAME=`printf "$TMPDIR/frame.$NUMFMT.png" $ZAHL`
#  mv $TMPDIR/frame.png.$ZAHL $FNAME
#done
#
#echo "######### Encoding animation to $OOPTION"
#echo
#
#png2yuv -n $(( FRAMES+1 )) -f30 -L0 -Ip -j $TMPDIR/frame.$NUMFMT.png | mpeg2enc -o $OOPTION --video-bitrate 1151 --format 3 --motion-search-radius 32 --no-constraints

rm -rf $TMPDIR