Processing 1.0 - Processing Discourse - 30 Webcam Feeds = Very Slow

koogy God Member Offline Posts: 788	Re: 30 Webcam Feeds = Very Slow Reply #15 - Dec 11^th, 2009, 8:14am your draw method needs {}s

PhiLho

Re: 30 Webcam Feeds = Very Slow
Reply #16 - Dec 11^th, 2009, 8:16am

You should put braces {} around the code of draw()...

Also you can write:
Code:

String[] feeds =
{
"http://www.adelaidecitycouncil.com/netcatapps/webcam/images/centralMkt.jpg",
"http://www.adelaidecitycouncil.com//NetcatApps/webcam/images/bellnth.jpg",
// etc.
};

before setup, thus no need to count the number of feeds, no more manual incrementation of indices, etc. Cleaner.

And no need for two loadImage loops in setup().

ProductLM

Re: 30 Webcam Feeds = Very Slow
Reply #17 - Dec 11^th, 2009, 8:59am

Righty ho, I've put the brackets in (schoolboy error!) & changed the array to make it cleaner but now it's saying "Syntax error, maybe missing a semicolon?" 'at the String[] feeds' = part. What's going on?

String[] feeds =
{ "http://www.adelaidecitycouncil.com/netcatapps/webcam/images/centralMkt.jpg",
"http://www.adelaidecitycouncil.com//NetcatApps/webcam/images/bellnth.jpg",

...

"http://www.outercam.co.uk/ssc/camera2.jpg?1260455145216";};
PImage[] imgfeeds = new PImage[30];

void setup(){
size(1280, 800);

for (int i = 0 ; i < 29 ; i++) {
imgfeeds[i] = loadimage(imgfeeds[i]);
}
}

void draw(){
int i = (int)random(29);
feeds[i] = loadimage(imgfeeds[i]);
delay(1000);
}

koogy God Member Offline Posts: 788	Re: 30 Webcam Feeds = Very Slow Reply #18 - Dec 11^th, 2009, 9:18am this: String[] oneDimArray = { "abc","def","xyz" }; suggests you don't need that last semicolon inside the {}s in your string[] definition

ProductLM YaBB Newbies Offline Posts: 39	Re: 30 Webcam Feeds = Very Slow Reply #19 - Dec 11^th, 2009, 9:25am Thanks, that worked, but this thing just doesn't want to live! It's now saying "The function loadImage(PImage) does not exist"(?!) this is happening in the imgfeeds[i] = loadimage(imgfeeds[i]); part of the code. What is going wrong?

koogy God Member Offline Posts: 788	Re: 30 Webcam Feeds = Very Slow Reply #20 - Dec 11^th, 2009, 9:30am capital I in loadImage...

ProductLM

Re: 30 Webcam Feeds = Very Slow
Reply #21 - Dec 11^th, 2009, 9:39am

It's slowly coming together! I think there's just one more thing (touch wood) - It says "The methodloadImage(String) in the type PApplet is not applicable for the arguments (PImage)".

I have figured out what this means, but I don't know how to change the format of the feeds in the array...

I'm so close!!!

String[] feeds =
{ "http://www.adelaidecitycouncil.com/netcatapps/webcam/images/centralMkt.jpg",

...

"http://www.outercam.co.uk/ssc/camera2.jpg?1260455145216"};
PImage[] imgfeeds = new PImage[30];

void setup(){
size(1280, 800);

for (int i = 0 ; i < 29 ; i++) {
imgfeeds[i] = loadImage(imgfeeds[i]);
}
}

void draw(){
int i = (int)random(29);
feeds[i] = loadImage(imgfeeds[i]);
delay(1000);

koogy God Member Offline Posts: 788	Re: 30 Webcam Feeds = Very Slow Reply #22 - Dec 11^th, 2009, 10:31am loadImage is expecting the name, ie feeds[i], rather then the image

ProductLM

Re: 30 Webcam Feeds = Very Slow
Reply #23 - Dec 11^th, 2009, 1:22pm

Yay, the code is now displaying feeds, but it is all of the same image. I'm wanting each of the 30 feeds to display different images. How do I do that?

String[] feeds = new String[30];

PImage[] imgfeeds = new PImage[30];

void setup(){

feeds[0] = ("http://www.adelaidecitycouncil.com/netcatapps/webcam/images/centralMkt.jpg");
feeds[1] = ("http://www.adelaidecitycouncil.com//NetcatApps/webcam/images/bellnth.jpg");
feeds[2] = ("http://www.adelaidecitycouncil.com/netcatapps/webcam/images/rundleEast.jpg");
feeds[3] = ("http://www.adelaidecitycouncil.com/netcatapps/webcam/images/sk8cam.jpg");
feeds[4] = ("http://www.adelaidecitycouncil.com//NetcatApps/webcam/images/bellsth.jpg");
feeds[5] = ("http://www.abbeyroad.com/webcam/crossing.jpg?cacheKiller=362683");
feeds[6] = ("http://server.fishycam.com/fishycam.jpg?time=1260184950863");
feeds[7] = ("http://www.cph.dk/CPHdata/webcam/CPH_spot1.jpg?1260188477647");
feeds[8] = ("http://www.adelaidecitycouncil.com/netcatapps/webcam/images/rundle.jpg");
feeds[9] = ("http://images.ibsys.com/sea/images/weather/auto/queenannecam_640x480.jpg?");
feeds[10] = ("http://www.pani.com/webcam/airport_tower.jpg?");
feeds[11] = ("http://www.cph.dk/CPHdata/webcam/CPH_spot3.jpg?1260369631305");
feeds[12] = ("http://www.camchickens.com/webcam.jpg");
feeds[13] = ("http://www.terrapin-gardens.net/images/webcam.jpg");
feeds[14] = ("http://stream.fisheyeview.com/FVCam.jpg");
feeds[15] = ("http://www.cs.ualberta.ca/~lake/cam/jpg/large/201.jpg");
feeds[16] = ("http://webcams.pancanal.com/webcam/miraflores.jpg");
feeds[17] = ("http://www.oceanvillageholidays.co.uk/webcam/ov1.jpg");
feeds[18] = ("http://brooklyn-bridge.mobotixcam.de/record/current.jpg?rand=380424");
feeds[19] = ("http://www.outercam.co.uk/ssc/camera3.jpg?1260446915311");
feeds[20] = ("http://www.xs4all.nl/~twocats/cam/Cam-A.jpg");
feeds[21] = ("http://www.sat.dundee.ac.uk/webcam/cam0.jpg");
feeds[22] = ("http://facweb.furman.edu/~rbryson/dramadept/TheatreCamPic.jpg");
feeds[23] = ("http://www.cbc.ca/bc/webcam/images/webcam.jpg");
feeds[24] = ("http://www.outercam.co.uk/ssc/camera2.jpg?1260455145216");
feeds[25] = ("http://www.jb.man.ac.uk/common/camera30sec.jpg?dummy=1260456117729");
feeds[26] = ("http://ecoast.vs.oiccam.com:443/ftp/capcom/jackalope/image.jpg?rand=14:52:10");
feeds[27] = ("http://www.outercam.co.uk/ssc/camera2.jpg?1260455145216");
feeds[28] = ("http://www.outercam.co.uk/ssc/camera2.jpg?1260455145216");
feeds[29] = ("http://www.outercam.co.uk/ssc/camera2.jpg?1260455145216");

imgfeeds[0] = loadImage("http://www.adelaidecitycouncil.com/netcatapps/webcam/images/centralMkt.jpg");
imgfeeds[1] = loadImage("http://www.adelaidecitycouncil.com//NetcatApps/webcam/images/bellnth.jpg");
imgfeeds[2] = loadImage("http://www.adelaidecitycouncil.com/netcatapps/webcam/images/rundleEast.jpg");
imgfeeds[3] = loadImage("http://www.adelaidecitycouncil.com/netcatapps/webcam/images/sk8cam.jpg");
imgfeeds[4] = loadImage("http://www.adelaidecitycouncil.com//NetcatApps/webcam/images/bellsth.jpg");
imgfeeds[5] = loadImage("http://www.abbeyroad.com/webcam/crossing.jpg?cacheKiller=362683");
imgfeeds[6] = loadImage("http://server.fishycam.com/fishycam.jpg?time=1260184950863");
imgfeeds[7] = loadImage("http://www.cph.dk/CPHdata/webcam/CPH_spot1.jpg?1260188477647");
imgfeeds[8] = loadImage("http://www.adelaidecitycouncil.com/netcatapps/webcam/images/rundle.jpg");
imgfeeds[9] = loadImage("http://images.ibsys.com/sea/images/weather/auto/queenannecam_640x480.jpg?");
imgfeeds[10] = loadImage("http://www.pani.com/webcam/airport_tower.jpg?");
imgfeeds[11] = loadImage("http://www.cph.dk/CPHdata/webcam/CPH_spot3.jpg?1260369631305");
imgfeeds[12] = loadImage("http://www.camchickens.com/webcam.jpg");
imgfeeds[13] = loadImage("http://www.terrapin-gardens.net/images/webcam.jpg");
imgfeeds[14] = loadImage("http://stream.fisheyeview.com/FVCam.jpg");
imgfeeds[15] = loadImage("http://www.cs.ualberta.ca/~lake/cam/jpg/large/201.jpg");
imgfeeds[16] = loadImage("http://webcams.pancanal.com/webcam/miraflores.jpg");
imgfeeds[17] = loadImage("http://www.oceanvillageholidays.co.uk/webcam/ov1.jpg");
imgfeeds[18] = loadImage("http://brooklyn-bridge.mobotixcam.de/record/current.jpg?rand=380424");
imgfeeds[19] = loadImage("http://www.outercam.co.uk/ssc/camera3.jpg?1260446915311");
imgfeeds[20] = loadImage("http://www.xs4all.nl/~twocats/cam/Cam-A.jpg");
imgfeeds[21] = loadImage("http://www.sat.dundee.ac.uk/webcam/cam0.jpg");
imgfeeds[22] = loadImage("http://facweb.furman.edu/~rbryson/dramadept/TheatreCamPic.jpg");
imgfeeds[23] = loadImage("http://www.cbc.ca/bc/webcam/images/webcam.jpg");
imgfeeds[24] = loadImage("http://www.outercam.co.uk/ssc/camera2.jpg?1260455145216");
imgfeeds[25] = loadImage("http://www.jb.man.ac.uk/common/camera30sec.jpg?dummy=1260456117729");
imgfeeds[26] = loadImage("http://ecoast.vs.oiccam.com:443/ftp/capcom/jackalope/image.jpg?rand=14:52:10");
imgfeeds[27] = loadImage("http://www.outercam.co.uk/ssc/camera2.jpg?1260455145216");
imgfeeds[28] = loadImage("http://www.outercam.co.uk/ssc/camera2.jpg?1260455145216");
imgfeeds[29] = loadImage("http://www.outercam.co.uk/ssc/camera2.jpg?1260455145216");

size(1280, 800);

for (int i = 0 ; i < 30 ; i++) {
imgfeeds[i] = loadImage(feeds[i]);
}
}

void draw(){
int i = (int)random(30);
imgfeeds[i] = loadImage(feeds[i]);
delay(1000);

image(imgfeeds[i], 0, 0, (width/6), (height/5));
image(imgfeeds[i], (width/6), 0, (width/6), (height/5));
image(imgfeeds[i], (width/6)*2, 0, (width/6), (height/5));
image(imgfeeds[i], (width/6)*3, 0, (width/6), (height/5));
image(imgfeeds[i], (width/6)*4, 0, (width/6), (height/5));
image(imgfeeds[i], (width/6)*5, 0, (width/6), (height/5));

}

antiplastik

Re: 30 Webcam Feeds = Very Slow
Reply #24 - Dec 11^th, 2009, 1:50pm

When you post some code, please use [ code ] and [ /code ] tags (without spaces) to make your code look like... code! Cool

Why don't you try with 4 feeds? That would be much easier to read for us.

Your 30 lines in setup() starting with
Code:

imgfeeds[...] = loadImage("...");

are useless since you fill the array later in a simple loop with
Code:

for (int i = 0 ; i < 30 ; i++) {
  imgfeeds[i] = loadImage(feeds[i]);
}

which is the proper way to do this.

The last image(...) statements in your draw() loop print the same image. If you want to display other images, you have to change i between each statement.

ProductLM YaBB Newbies Offline Posts: 39	Re: 30 Webcam Feeds = Very Slow Reply #25 - Dec 11^th, 2009, 2:15pm Thanks antiplastik, I'm new & don't really know how to work this! OK I'll play around with the i bit & I'll get back to you. Sorry again!

koogy

Re: 30 Webcam Feeds = Very Slow
Reply #26 - Dec 11^th, 2009, 2:27pm

is late here and i'm slightly fed up...

change NROWS and NCOLS to number of rows and columns. these should multiply up to the number of feeds.

add feeds to the feeds array.

Code:


public static final int NROWS = 1;
public static final int NCOLS = 6;

// list of cameras
String[] feeds = {
  "http://www.adelaidecitycouncil.com/netcatapps/webcam/images/centralMkt.jpg",
  "http://www.adelaidecitycouncil.com//NetcatApps/webcam/images/bellnth.jpg",
  "http://www.adelaidecitycouncil.com/netcatapps/webcam/images/rundleEast.jpg",
  "http://www.adelaidecitycouncil.com/netcatapps/webcam/images/sk8cam.jpg",
  "http://www.adelaidecitycouncil.com//NetcatApps/webcam/images/bellsth.jpg",
  "http://www.abbeyroad.com/webcam/crossing.jpg?cacheKiller=362683"
  // more here...
};
PImage[] images;

void setup(){ 
  size(1280, 600);
  // need as many images as we have feeds
  images = new PImage[feeds.length];
  // initial load of images (slow)
  for (int i = 0 ; i < feeds.length ; i++) {
    images[i] = loadImage(feeds[i]);
  }
}
 
void draw(){
  // draw grid
  int index = 0;
  for (int y = 0 ; y < NROWS ; y++) {
    for (int x = 0 ; x < NCOLS ; x++) {
      image(images[index], x * (width / NCOLS), y * (height / NROWS), (width / NCOLS), (height / NROWS));
      index++;
    }
  }

  // update a random image
  int i = (int)random(feeds.length);
  images[i] = loadImage(feeds[i]);

  // sleep
  delay(1000);
}

ProductLM YaBB Newbies Offline Posts: 39	Re: 30 Webcam Feeds = Very Slow Reply #27 - Dec 12^th, 2009, 6:42am Thanks, one day I will become a Processing God & help other people out!