video pixelation screen size

2. // Learning Processing
3. // Daniel Shiffman
4. // http://www.learningprocessing.com
5. 
   
6. // Example 16-7: Video pixelation
7. 
   
8. import processing.video.*;
9. 
   
10. // Size of each cell in the grid, ratio of window size to video size
11. //int videoScale = 8;
12. 
    
13. int videoScale = 16; //20 columns ; 15 rows
14. 
    
15. 
    
16. //int videoScale = 32; //20 columns ; 15 rows
17. 
    
18. 
    
19. //int videoScale = 64; //10 columns ; 7 rows
20. 
    
21. // Number of columns and rows in our system
22. int cols, rows;
23. // Variable to hold onto Capture object
24. Capture video;
25. 
    
26. void setup() {
27.   size(640,480);
28.    // size(500,500);
29. 
    
30.   
31.   // Initialize columns and rows
32.   cols = width/videoScale;
33.   rows = height/videoScale;
34.   video = new Capture(this,width,height);
35.   video.start();
36. }
37. 
    
38. void draw() {
39.   // Read image from the camera
40.   if (video.available()) {
41.     video.read();
42.   }
43.   video.loadPixels();
44.   
45.   // Begin loop for columns
46.   for (int i = 0; i < cols; i++) {
47.     // Begin loop for rows
48.     for (int j = 0; j < rows; j++) {
49.       
50.       // Where are we, pixel-wise?
51.       int x = i*videoScale;
52.       int y = j*videoScale;
53.       // Looking up the appropriate color in the pixel array
54.       color c = video.pixels[x + y*video.width];
55.       fill(c);
56.       stroke(0);
57.       rect(x,y,videoScale,videoScale);
58.     }
59.   }
60. }

* (Processing core video:46085): WARNING **: ColorConverter: size 512000 is not a multiple of unit size 500000