Learning Processing: A Beginner's Guide to Programming Images ...

Exporting 405
Example 21-5 records a movie of a mouse drawing on the screen. Th e movie is fi nished when the space
bar is pressed.
Example 21-5: Making a QuickTime movie
import processing.video.*;
fi g. 21.6 Output of Example 21-5
MovieMaker mm; // Declare MovieMaker object
void setup() {
size(320, 240);
// Create MovieMaker object with size, filename,
// framerate, compression codec and quality
mm = new MovieMaker(this, width, height, "drawing.mov", 30, MovieMaker.H263,
MovieMaker.HIGH);
background(255);
}
void draw() {
stroke(0);
strokeWeight(4);
if (mousePressed) {
line(pmouseX, pmouseY, mouseX, mouseY);
}
mm.addFrame(); // Add window's pixels to movie
}
The MovieMaker class is part of
Processing’s video library.
A new frame is added to the movie
every cycle through draw( ).
void keyPressed() {
if (key = = ' ') {
println( "finishing movie ");
mm.finish(); // Finish the movie if space bar is pressed!
}
}
Do not forget to fi nish the movie! Otherwise, it will not play properly.
Exercise 21-3: Create a movie from any Processing sketch you have made or any example
in this book.