test: added python test

* added opencv_rtsp_client script for opening the camera streamer rtsp stream and displaying it in real time from a computer.

Author: finger563

opencv_rtsp_client.py

@@ -0,0 +1,15 @@
+import sys
+import cv2
+
+def stream(addr, port):
+    vcap = cv2.VideoCapture(f"rtsp://{addr}:{port}/mjpeg/1")
+    while(1):
+        ret, frame = vcap.read()
+        cv2.imshow('VIDEO', frame)
+        cv2.waitKey(1)
+
+if __name__ == "__main__":
+    if len(sys.argv) != 3:
+        print("Usage: python ./opencv_rtsp_client <address> <rtsp_port>")
+        sys.exit(1)
+    stream(sys.argv[1], sys.argv[2])