Having some trouble getting the Frame Differencing filter to read a .mov file
Any ideas where I am going wrong?
import processing.video.*;
int numPixels;
int[] previousFrame;
Movie video;
void setup() {
size(1920, 880);
// This the default video input, see the GettingStartedCapture
// example if it creates an error
video = new Movie(this, "Move1.mov");
// Start capturing the images from the camera
video.loop();
//video.read();
numPixels = video.width * video.height;
// Create an array to store the previously captured frame
previousFrame = new int[numPixels];
loadPixels();
}
void draw() {
if (video.available()) {
// When using video to manipulate the screen, use video.available() and
// video.read() inside the draw() method so that it's safe to draw to the screen
video.read(); // Read the new frame from the camera
video.loadPixels(); // Make its pixels[] array available
image(video, 0, 0);
int movementSum = 0; // Amount of movement in the frame
for (int i = 0; i < numPixels; i++) { // For each pixel in the video frame...
color currColor = video.pixels[i];
color prevColor = previousFrame[i];
// Extract the red, green, and blue components from current pixel
int currR = (currColor >> 16) & 0xFF; // Like red(), but faster
int currG = (currColor >> 8) & 0xFF;
int currB = currColor & 0xFF;
// Extract red, green, and blue components from previous pixel
int prevR = (prevColor >> 16) & 0xFF;
int prevG = (prevColor >> 8) & 0xFF;
int prevB = prevColor & 0xFF;
// Compute the difference of the red, green, and blue values
int diffR = abs(currR - prevR);
int diffG = abs(currG - prevG);
int diffB = abs(currB - prevB);
// Add these differences to the running tally
movementSum += diffR + diffG + diffB;
// Render the difference image to the screen
pixels[i] = color(diffR, diffG, diffB);
// The following line is much faster, but more confusing to read
//pixels[i] = 0xff000000 | (diffR << 16) | (diffG << 8) | diffB;
// Save the current color into the 'previous' buffer
previousFrame[i] = currColor;
}
// To prevent flicker from frames that are all black (no movement),
// only update the screen if the image has changed.
if (movementSum > 0) {
updatePixels();
println(movementSum); // Print the total amount of movement to the console
}
}
}