[DigiKey "Smart Manufacturing, Non-stop Happiness" Creative Competition] 4. Get webcam video stream with OpenCV

顺竿爬

[DigiKey "Smart Manufacturing, Non-stop Happiness" Creative Competition] 4. Get webcam video stream with OpenCV [Copy link]

 

The video stream is provided by an ESP32-CAM development board. Through the web debugging tool, we can easily get the video stream address http://xxx.xxx.xxx.xxx:81/stream . The camera control is completed using the get method. For example, to set the video stream resolution, use get http://xxx.xxx.xxx.xxx/control?var=framesize&val=7 . Changing the number behind it can change the resolution. Currently, 7 corresponds to 800*480, which I think is moderate.

I wrote a class that can start the video stream with the following method:

```

 def stream_start(self, _size = None):

 if not _size:

 _size = self._size

 requests.get(self._url+"/control?var=framesize&val=" + str(_size))

 self._cap = cv2.VideoCapture(self._strem_url)



 def stream(self, _show = False, _save = False):

 self._cap.set(cv2.CAP_PROP_POS_FRAMES,-1)

 self._cap.grab()

 _capture = self._cap.retrieve()

 _capture

 if _save:

 cv2.imwrite("stream.jpg", _capture[1])

 if _show:

 cv2.imshow("stream", _capture[1])

 cv2.waitKey(1)

 return _capture

```

Jacktang

OpenCV gets the webcam video stream. This can be