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2016-12-06 11:19:36 -0600 received badge  Supporter (source)
2016-12-06 11:01:05 -0600 answered a question Can't open RTSP stream with OpenCV cuda video_reader

Do you have the library opencv_ffmpeg3000.dll in your path? What is your rtsp String?

2016-12-06 10:41:59 -0600 answered a question How do I live stream wifi camera using python opencv ?

An Ip Camera (WiFi) needs a rtsp protocol, so you have to change the zero.

cap = cv2.VideoCapture("rtsp://user:[email protected]:554/cam/[email protected]=1")

Dahua sells a compatible camera with OpenCv.

2016-12-06 10:37:02 -0600 answered a question How to read images from a camera buffer

You can use a rtsp protocol, something like this: rtsp://admin:[email protected]/defaultPrimary?streamType=u

Check if your camera is OnVif compatible. Is just an example.