Cannot get frames from Capture camera

meisbarry

Cannot get frames from Capture camera

in Integration and Hardware • 4 months ago

I'm using the latest stable Processing on WinXP(32bit).

I have an analog CCTV camera connected via USB using this thing: http://www.encore-usa.com/us/taxonomy/term/491/all. The drivers are properly installed, and everything recognizes the camera. Other programs are able to view the camera's feed just fine.

Processing, however, just gives me a blank image, as though no frames are ever available. I've tried my own code plus several of the Capture examples.

Capture.list() gives me:

[0] "name=Video Grabber,size=720x480,fps=0"
[1] "name=Video Grabber,size=720x480,fps=30"
[2] "name=Video Grabber,size=352x240,fps=30"
[3] "name=Video Grabber,size=352x480,fps=30"
[4] "name=Video Grabber,size=720x480,fps=0"
[5] "name=Video Grabber,size=720x480,fps=30"
[6] "name=Video Grabber,size=352x240,fps=30"
[7] "name=Video Grabber,size=352x480,fps=30"
[8] "name=Video Grabber,size=720x480,fps=0"
[9] "name=Video Grabber,size=720x480,fps=30"
[10] "name=Video Grabber,size=352x240,fps=30"
[11] "name=Video Grabber,size=352x480,fps=30"

I've tried all of these "devices" and all give the same result.

Is there anything I can try to get this to work? I can get a different/better USB adaptor but I'd prefer to avoid it.

Replies(2)

meisbarry

Re: Cannot get frames from Capture camera

4 months ago

I ended up purchasing another adaptor, and have the exact same issue. I am now less convinced this is a hardware issue and am instead leaning towards a problem with Processing.

This time, it was a Hauppauge USB-Live2. The only difference is that this device only shows one camera in Capture.list(), with no resolution or fps information. Connecting to it yields a black image, and the .available() method never returns true. If I force reads by calling .read() outright in draw(), I get a small error regarding the "rgb:sink", then nothing.

This is very frustrating. Is there something I can try?

pascualfu..

Re: Cannot get frames from Capture camera

4 months ago

I have a similar issue though I'm using Sabrent VD-GRBR with a WinXP(64-bit). Processing lists Sabrent as a recognizable device, though I get a blank screen. cam.available() prints false. Heres my code:

import processing.video.*;

Capture cam;

void setup() {

size(720, 480, P2D);

frameRate(30);

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(i + " " + cameras[i]);

}

// The camera can be initialized directly using an

// element from the array returned by list():

cam = new Capture(this, "name=Sabrent,size=720x480, fps=30");

cam.start();

}

void draw() {

if (cam.available() == true) {

cam.read();

println("CAM AVAILABLE!!");

}

else{

println("Cam Not Available");

}

set(0, 0, cam);

// The following does the same, and is faster when just drawing the image

// without any additional resizing, transformations, or tint.

//set(0, 0, cam);

}

Any help would be much appreciated!

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