I am using opencv 2.3 on ubuntu 11.04. while compiling, for completeness, I’d set

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Asked: May 24, 20262026-05-24T21:46:32+00:00 2026-05-24T21:46:32+00:00

I am using opencv 2.3 on ubuntu 11.04. while compiling, for completeness, I’d set

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I am using opencv 2.3 on ubuntu 11.04. while compiling, for completeness, I’d set WITH_OPENNI=ON. (regret it now, because I dont plan to use a kinect soon, and openni is giving me headaches with normal opencv programs)

anyway, to test the opencv installation i compiled following code that shows me video from my laptop webcam:

#include <stdio.h>
#include <string.h>
#include "highgui.h"
#include "cv.h"

int main()
{
cvNamedWindow("Webcam",CV_WINDOW_AUTOSIZE);
CvCapture* capture=cvCaptureFromCAM(0);
IplImage* frame;

while(1)
{
    frame=cvQueryFrame(capture);
    if(!frame) break;
    cvShowImage("Webcam",frame);
    char c=cvWaitKey(33);
    if(c==27) break;
}

cvReleaseCapture(&capture);
cvDestroyWindow("Webcam");
}

the code complies correctly but gives the following error on execution:

OpenCV Error: Unspecified error (Failed to enumerate production trees: Can’t create any node of the requested type!) in CvCapture_OpenNI, file /home/samarth/OpenCV-2.3.0/modules/highgui/src/cap_openni.cpp, line 188
terminate called after throwing an instance of ‘cv::Exception’
what(): /home/samarth/OpenCV-2.3.0/modules/highgui/src/cap_openni.cpp:188: error: (-2) Failed to enumerate production trees: Can’t create any node of the requested type! in function CvCapture_OpenNI

Aborted

has anybody faced the same problem? any idea to cure this would be highly appreciated.