Using Capture with Processing 2.0+ issues on Mac

Core Library Questions

robarelli

Using Capture with Processing 2.0+ issues on Mac

in Core Library Questions • 1 year ago

I am trying to use a webcam with Processing 2.0 using the Capture example provided on the website ( http://processing.org/reference/libraries/video/Capture.html), however it just returns a black image. I can even remove my webcams and it still won't even work with the built in iSight camera. There are no errors that can help me on the right path as to whats happening. However it does work using Processing 1.5.1 with the same code. I am on a Mac 64-bit Snow Leopard and have tried all 2.0 alpha versions. Any ideas on whats going on?

Example code I used from the website is below:

import processing.video.*;
Capture myCapture;

void setup() 
{
  size(200, 200);
  myCapture = new Capture(this, width, height, 30);
}

void captureEvent(Capture myCapture) {
  myCapture.read();
}

void draw() {
  image(myCapture, 0, 0);
}

Replies(1)

robarelli

Re: Using Capture with Processing 2.0+ issues on Mac

1 year ago

Just figured it out. Apparently Processing 2.0 has integrated the GSVideo library and uses its implementation in the Capture class, however the documentation has not been updated to reflect that. The GSVideo class reference can be found here http://gsvideo.sourceforge.net/reference/index.html

I updated the example code, which is now the following

import processing.video.*;
Capture myCapture;
void setup()
{
size(640, 480);
// The name of the capture device is dependent on
// the cameras that are currently attached to your
// computer. To get a list of the
// choices, uncomment the following line
// println(Capture.list());
// To select the camera, replace "Camera Name"
// in the next line with one from Capture.list()
// myCapture = new Capture(this, width, height, Capture.list()[0], 30);
// This code will try to use the camera used
myCapture = new Capture(this, width, height, 30);
myCapture.start();
}
void draw() {
if(myCapture.available() == true){
myCapture.read();
image(myCapture, 0, 0);
}
}

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