c++ - Can't cat image from the videostream opencv -


other questions did't me, ask mine

can't image videocam using latest opencv library. 

void showcam(int cameratobeopened) { int = 0; cv::mat frame; cv::videocapture cap(cameratobeopened); cvnamedwindow("camera", cv_window_normal); while (true) { if (cap.read(frame))     imshow("camera", frame); char c = cvwaitkey(50); if (c == 27)     break; if (c == 32) {     char filename[200];     sprintf_s(filename, "\test pictures\test_%d.jpg", i);     i++;     cv::imwrite(filename, frame);     std::cout << "image has been captured" << std::endl; } }

it doesn't generate mistakes, can't find images in folder.


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