processing.app.debug.RunnerException: The function resolutions() does not exist.
    at processing.app.Sketch.placeException(Sketch.java:1543)
    at processing.app.debug.Compiler.compile(Compiler.java:149)
    at processing.app.Sketch.build(Sketch.java:1573)
    at processing.app.Sketch.build(Sketch.java:1553)
    at processing.app.Editor$DefaultRunHandler.run(Editor.java:1485)
    at java.lang.Thread.run(Thread.java:636)

Using the example script getting started capture linux:
int[][] res = cam.resolutions();

also tried
int[][] res = GSCapture.resolutions();

int[][] res = new GSCapture.resolutions(this);

gives this error as does any other method called GSCapture except available.
Are these methods not available in linux?

/**
 * Getting Started with Capture.
 *
 * GSVideo version by Andres Colubri.
 *
 * Reading and displaying an image from an attached Capture device.
 */
import codeanticode.gsvideo.*;
import codeanticode.gsvideo.GSCapture;


GSCapture cam;

void setup() {
  size(640, 480);
  // size(1024, 768);

  /*
  However, different cameras can be selected by using their device file:
  cam = new GSCapture(this, 640, 480, "/dev/video0");
  cam = new GSCapture(this, 640, 480, "/dev/video1");
  etc.
  */
  cam = new GSCapture(this, 640, 480);
  int[][] res = cam.resolutions();
}

void draw() {
  if (cam.available() == true) {
    cam.read();
    image(cam, 0, 0);
    // The following does the same, and is faster when just drawing the image
    // without any additional resizing, transformations, or tint.
    //set(160, 100, cam);
  }
}

Is there a way to set the camera's input size in GS video so that it shows in say a 640/480 box inside a sketch that's 800 x 600 or larger? My camera doesn't seem to work when asked for resolutions higher than 640/480.


void setup() {
  size(640, 480);

  cam = new GSCapture(this, 640, 480);
      numPixels = cam.width * cam.height;

Hey,

For some weird reason my GSvideo capture mirrors the movement on the webcam.

Is there a way to reverse the X values so that when I move my hand to the right it shows
up with me moving my hand to the right on the screen?

I tried using a reverse method I found on the net, but it reverses the Y values...

Script is below


 import codeanticode.gsvideo.*;
 
public class ArrayHandle
{
public static Object[] reverse(Object[] arr)
{
List<Object> list = Arrays.asList(arr);
Collections.reverse(list);
return list.toArray();
}

}

int numPixels;
int[] backgroundPixels;
int[] currentPixels;
GSCapture cam;
int[] cords = {0};
int[] diffies;
int framer = 0;
int presenceSum = 0;

void setup() {
  size(640, 480);

  cam = new GSCapture(this, width, height);
      numPixels = cam.width * cam.height;
      backgroundPixels = new int[numPixels];
      currentPixels = new int[numPixels];
      loadPixels();
     
}

void draw() {
  if (cam.available() == true) {
    cam.read();
    cam.loadPixels();
    arraycopy(cam.pixels, currentPixels);
    // currentPixels = reverse(currentPixels);
 
  for (int y = 0; y < height; y++) {
    for (int x = 0; x < width; x++) {
        int loc = x + y * width;
        color currColor = currentPixels[loc];
    int currR = (currColor >> 16) & 0xFF;
    int currG = (currColor >> 8) & 0xFF;
    int currB = currColor & 0xFF;
    color bkgdColor = backgroundPixels[loc];
    int bkgdR = (bkgdColor >> 16) & 0xFF;
    int bkgdG = (bkgdColor >> 8) & 0xFF;
    int bkgdB = bkgdColor & 0xFF;
    int diffR = abs(currR - bkgdR);
    int diffG = abs(currG - bkgdG);
    int diffB = abs(currB - bkgdB);
    presenceSum += diffR + diffG + diffB;
    if (currG == bkgdG) {pixels[loc] = color(255);
    } else {pixels[loc] = color(0);}
    }
  }
  }
   
    updatePixels();
   
    rect(10, 10, presenceSum * 0.000005, 20);
    //abs what is abs in trig?
    //beginShape();
    //vertex(50, 60);
    //vertex(100, 200);
    //endShape();
    //dist() computes the distance between previous value and current value
    // map() will map input to a set range mouseX, 60, 180 etc.
    if (framer > 5 ) {
    arraycopy(cam.pixels, backgroundPixels);
    // backgroundPixels = reverse(backgroundPixels);
  framer = framer - 5;
presenceSum = 0;
}
    else {
    framer++;}
   
    if(Arrays.equals(currentPixels, backgroundPixels)) { // no test right now
  }
      else { // no test right now
    }
     
     
   
    cam.updatePixels();

   
    // color currColor = video.pixels[i];
    // image(cam, x in box, y in box);
    // The following does the same, and is faster when just drawing the image
    // without any additional resizing, transformations, or tint.
    // set(160, 100, cam);
  }

A few questions

1. I want to create curves using difference mapping and Gsvideo. Is it possible to have the camera running and my application reading from the camera w/o actually displaying the output of the camera to the screen? i.e. do I have to put cam in img or could I

  video = new GSCapture(this, width, height, 24);
loadPixels

and have it read the camera actively?

2. when I'm looping through pixels using my loops if (int i = 0; i < pixels.length; i++) {pixels[i].extra y and x value}

each pixels stores its x and y value where? When pixels[i] comes up, how can I extract the x and y values from the pixels or is that not stored in the pixel array and processing simply starts at 0,0 and iterates to the last pixel?
is there a pixel[i][0] with the x value and a pixels[i][1] with the Y value?

Sorry about that, the size of the array is the size of the window... gotcha... hence pixels[0] x = 0 y = 0 etc. it does wrap around correct i.e. pixels[1] x = 1 y = 0 pixels[2] x = 2 y = 0

I'm sorry if my questions are naive, but I'm a bit of a beginner.

3. Extra bonus question: I delcare int[] coords = {540, 320};
in my set up, when I tried to call it in the draw draw method I get an error, no such thing as coods.

Here is my code so far (I'm just trying to mod the original GSvideo example):

/**
 * Getting Started with Capture.
 *
 * GSVideo version by Andres Colubri.
 *
 * Reading and displaying an image from an attached Capture device.
 */
import codeanticode.gsvideo.*;

GSCapture cam;

void setup() {
  size(640, 480);


  /*
  // List functionality still not ready on Linux
  String[] cameras = GSCapture.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]);
    cam = new GSCapture(this, 320, 240, cameras[0]);
  }

  However, different cameras can be selected by using their device file:
  cam = new GSCapture(this, 640, 480, "/dev/video0");
  cam = new GSCapture(this, 640, 480, "/dev/video1");
  etc.
  */
  int[] coords = {540, 300}; // when I try to push pixels[i] value to this array in draw, I get no such thing as coords
  cam = new GSCapture(this, 640, 480);

}

void draw() {
  if (cam.available() == true) {
    cam.read();// turn this into a variable and then read from it.
    loadPixels();
    image(cam, 0, 0);
    int halfImage = width*height/2;
    color pink = color(255, 102, 204);
    loadPixels();
    for (int i = 0; i < halfImage; i++) {
    color currColor = pixels[i];
    int currR = (currColor >> 16) & 0xFF;
    int currG = (currColor >> 8) & 0xFF;
    int currB = currColor & 0xFF;
    int places = pixels[i];
    beginShape();
// this is where my little curve will begin
// if possible I just want to draw the shape and not display the camera image
    endShape();
    }
    updatePixels();
    // color currColor = video.pixels[i];
    // image(cam, x in box, y in box);
    // The following does the same, and is faster when just drawing the image
    // without any additional resizing, transformations, or tint.
    // set(160, 100, cam);
  }
}