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

16.3
Recorded Video
Video 281
Displaying recorded video follows much of the same structure as live video. Processing ’s video library
only accepts movies in QuickTime format. If your video fi le is a diff erent format, you will either have to
convert it or investigate using a third party library. Note that playing a recorded movie on Windows does
not require a vdig.
Step 1. Instead of a Capture object, declare a Movie object.
Movie movie;
Step 2. Initialize Movie object.
movie = new Movie(this, "testmovie.mov");
Th e only necessary arguments are this and the movie’s fi lename enclosed in quotes. Th e movie fi le should
be stored in the sketch’s data directory.
Step 3. Start movie playing.
Here, there are two options, play( ) , which plays the movie once, or loop( ) , which loops it continuously.
movie.loop();
Step 4. Read frame from movie.
Again, this is identical to capture. We can either check to see if a new frame is available, or use a callback
function.
Or:
void draw() {
if (movie.available()) {
movie.read();
}
}
void movieEvent(Movie movie) {
movie.read();
}
Step 5. Display the movie.
image(movie,0,0);
Example 16-4 shows the program all put together.