#!/bin/bash

#================================================================#

# #

# Script to encode .avi movies playable on windows machines #

# Requires arguments : #

# 1st - image file type (e.g. jpg,png,etc...) #

# 2nd - path to folder containing images, and for movie output. #

# 3rd - name of movie output file (without the file extension). #

# 4th - OPTIONAL - enter characters here to limit the image #

# files used as frames (e.g. 'image1' would only #

# select images which satisfy 'image1*.jpg'). #

# #

# e.g. "encode.sh jpg /data/movie_files my_movie image002" #

# will encode a movie called my_movie using all jpg files #

# from the directory /data/movie_files/ starting with the #

# characters 'image002' #

# #

# Feel free to change fps (frames per second) and BITRATE #

# For optimum value work bitrate out as: #

# #

# BITRATE = 1250*<no of pixels in x>*<no of pixels in y>/256 #

# #

#================================================================#

FILETYPE=$1

DIRNAME=$2

OUTPUTNAME=$3

IMAGEDIRNAME=$DIRNAME

# mencoder does not like gif images...

if [ $FILETYPE = "gif" ]; then

# Make the directory

PNGDIRNAME=$DIRNAME"/encode-png"

mkdir "-p" $PNGDIRNAME

echo "============================================================= "

echo "! mencoder does not like gif files, so creating a directory ! "

echo "! with png images to use to make the movie. This may take ! "

echo "! some time. The png images are located in: ! "

echo $PNGDIRNAME

echo "============================================================= "

echo

# Convert the images

for file in $DIRNAME/*.gif; do convert "$file" $PNGDIRNAME"/$(basename $file .gif).png"; done

FILETYPE="png"

IMAGEDIRNAME=$PNGDIRNAME

fi

# The input line for mencoder. change fps if you want a slower/faster movie

JOPT="mf://$IMAGEDIRNAME/"$4"*."$FILETYPE" -mf type="$FILETYPE":fps=25"

echo $JOPT

# Bitrate (this is worked out for ~600x800 image, change if your image is much different in size)

BITRATE=2160000

# Only change this if you know what you are doing....!

VOPT="vbitrate=$BITRATE:mbd=2:keyint=132:vqblur=1.0:cmp=2:subcmp=2:dia=2:mv0:last_pred=3"

echo $VOPT

# The important bit.

mencoder $JOPT -ovc lavc -lavcopts vcodec=msmpeg4v2:vpass=1:$VOPT -nosound -o /dev/null

mencoder $JOPT -ovc lavc -lavcopts vcodec=msmpeg4v2:vpass=2:$VOPT -nosound -o $DIRNAME/$OUTPUTNAME.avi

# Remove the log file

rm -rf divx2pass.log

# Check we made a movie

if [ -f $DIRNAME/$OUTPUTNAME.avi ]; then

echo

echo "=============================="

if [ $1 = "gif" ]; then

echo "# png images created in: #"

echo $PNGDIRNAME

echo "=============================="

fi

echo "# All done, enjoy the movie! #"

echo "=============================="

echo

else

echo

echo "=================================================================="

echo "! No .avi file produced. Check inputs are correct and try again. !"

echo "! !"

echo "! Input arguments should be: !"

echo "! 1st - image file type (e.g. jpg,png - not gif!) !"

echo "! 2nd - path to folder containing images, and for movie output. !"

echo "! 3rd - name of movie output file (without the file extension). !"

echo "! 4th - OPTIONAL - enter characters here to limit the image !"

echo "! files used as frames (e.g. 'image1' would only !"

echo "! select images which satisfy 'image1*.jpg'). !"

echo "! !"

echo "! e.g. 'encode.sh jpg /data/movie_files my_movie image002' !"

echo "! will encode a movie called my_movie using all jpg files !"

echo "! from the directory /data/movie_files/ starting with the !"

echo "! characters 'image002' !"

echo "=================================================================="

fi

# All done.