mjpg streaming

[nihui]

cv::VideoCapture cap;
cap.set(cv::CAP_PROP_FRAME_WIDTH, 720);
cap.set(cv::CAP_PROP_FRAME_HEIGHT, 720);
cap.open(0);

cv::VideoWriter writer;
writer.open(":12345", cv::VideoWriter::fourcc('M', 'J', 'P', 'G'));

cv::Mat bgr;
while (1)
{
    cap >> bgr;
    writer << bgr;
}