c++ - opencv imshow show gray in Opencv 3.1 -

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opencv imshow showing gray image.

#include "stdafx.h" #include <opencv2\opencv.hpp>  using namespace cv; using namespace std;    int main() {     videocapture cap;     mat frame;     cap.open(0);     while (true)     {         cap >> frame;         imshow("test", frame);         waitkey(30);     }     return 0; }

i upgraded windows insider preview 14316 , stopped working after think.

i checked if camera work in skype, , did. tried code on computer , worked.

any ideas?


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