fuzzychicken's profile - activity

The line

cvNamedWindow(CAMERA_OUTPUT_WINDOW_NAME, CV_WINDOW_AUTOSIZE);

has a strange side effect. My camera won't work without it.

For C++ version, just call namedWindow("test",1) outside the main loop makes it work.

#include <opencv2/opencv.hpp>

using namespace std;
using namespace cv;

int main(int, char**) {
  VideoCapture cap(0); // open the default camera
  // check if we succeeded
  if (!cap.isOpened()) {
    cout << "Error: Camera is not opened!" << endl;
    return -1;
  }

  Mat frame;

  // Strange bug in OpenCV 2.4.6.1: the camera won't work without doing this ???
  namedWindow("test", 1);

  // Main loop
  for (;;) {
    cap >> frame; // get a new frame from camera
    cout << "frame size: " << frame.rows << "," << frame.cols << endl;

    if (frame.rows > 0 && frame.cols > 0) {
      imshow("test", frame);
    }

    if (waitKey(30) >= 0) break;
  }

  return 0;
}