if it's a recent opencv version, this might work:
Mat frame;
namedWindow("video", 1);
VideoCapture cap("http://150.214.93.55/mjpg/video.mjpg");
while ( cap.isOpened() )
{
cap >> frame;
if(frame.empty()) break;
imshow("video", frame);
if(waitKey(30) >= 0) break;
}
one way or the other, opencv seems to insist, that the url must end with ".mjpg" (dot mjpg), so if it doesn't, add a dummy param to it, like : my/fancy/url?type=.mjpg
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