Webcam not working again after first run

Processing Libraries
1

I’m trying to use the webcam and it works the the first time I run it, after opening Processing. But after restarting it it crashes and won’t work anymore until I restart the whole Processing.

This is my code:

import processing.video.*;

Capture webcam;

int size = 300;
float theta;
PImage img;


void setup() {
  img = loadImage("data/sap-blanco.png");
  noFill();
  colorMode(HSB, 1.0);
  size(794, 794, P3D);
  sphereDetail(20);
  stroke(1, 0, 1);
  strokeWeight(3);
  background(0);
  frameRate(30);
  shapeMode(CENTER);
  String[] cameras = Capture.list();

  if (cameras.length == 0) {
    println("There are no cameras available for capture.");
    exit();
  } else {
    println("Available cameras:");
    for (int i = 0; i < cameras.length; i++) {
      println(cameras[i]);
    }

    // The camera can be initialized directly using an
    // element from the array returned by list():
    webcam = new Capture(this, cameras[0]);
    webcam.start();
  }
}

void draw() {
  if (webcam.available() == true) {
    webcam.read();
  }
  background(sin(theta), 1., 1., 1);

  push();
  translate(width/2, height/2);
  rotateY(theta);
  sphere(300) ;
  pop();

  theta += 0.01;
  push();
  image(webcam, 0, 0);
  pop();
  image(img, 0, 0);
}
2

Hi @animanoir :slight_smile:

It would help to know what operating system and version of Processing you are using, as well as the error message you are getting.

3

You’re right, sorry—here is the error code:

Processing video library using GStreamer 1.16.2
There are no cameras available for capture.
finishLifecycleAction(com.jogamp.opengl.util.FPSAnimator$3): ++++++ timeout reached ++++++ main-FPSAWTAnimator#00-Timer0
finishLifecycleAction(com.jogamp.opengl.util.FPSAnimator$3): OK false- pollPeriod 29, blocking true -> res false, waited 1001/1000 - main-FPSAWTAnimator#00-Timer0
 - com.jogamp.opengl.util.FPSAnimator[started true, animating true, paused false, drawable 1, totals[dt 0, frames 0, fps 0.0], modeBits 1, init'ed true, animThread Thread[main-FPSAWTAnimator#00-Timer0-FPSAWTAnimator#00-Timer1,5,main], exclCtxThread false(null)]
    [2]: com.jogamp.opengl.util.AnimatorBase.finishLifecycleAction(AnimatorBase.java:634)
    [3]: com.jogamp.opengl.util.FPSAnimator.stop(FPSAnimator.java:326)
    [4]: processing.opengl.PSurfaceJOGL.stopThread(PSurfaceJOGL.java:675)
    [5]: processing.core.PApplet.dispose(PApplet.java:3522)
    [6]: processing.opengl.PSurfaceJOGL$DrawListener.display(PSurfaceJOGL.java:836)
    [7]: jogamp.opengl.GLDrawableHelper.displayImpl(GLDrawableHelper.java:692)
    [8]: jogamp.opengl.GLDrawableHelper.display(GLDrawableHelper.java:674)
    [9]: jogamp.opengl.GLAutoDrawableBase$2.run(GLAutoDrawableBase.java:443)
    [10]: jogamp.opengl.GLDrawableHelper.invokeGLImpl(GLDrawableHelper.java:1293)
    [11]: jogamp.opengl.GLDrawableHelper.invokeGL(GLDrawableHelper.java:1147)
    [12]: com.jogamp.newt.opengl.GLWindow.display(GLWindow.java:782)
    [13]: com.jogamp.opengl.util.AWTAnimatorImpl.display(AWTAnimatorImpl.java:81)
    [14]: com.jogamp.opengl.util.AnimatorBase.display(AnimatorBase.java:453)
    [15]: com.jogamp.opengl.util.FPSAnimator$MainTask.run(FPSAnimator.java:178)
    [16]: java.base/java.util.TimerThread.mainLoop(Timer.java:566)
    [17]: java.base/java.util.TimerThread.run(Timer.java:516)
WARNING: no real random source present!

I do have a webcam and it does works the first time, but restarting it it fails with this.