title: how to connect to rtsp camera from docker container?
body: <p>I'm trying to get stream from IP camera with the help of openCV. Non-docker app runs fine on my PC, but i need to run it in a docker container. Here is my Dockerfile:</p>
  
  <pre><code>FROM jjanzic/docker-python3-opencv
  COPY . /app
  WORKDIR /app
  RUN pip install -r requirements.txt
  CMD ["./CameraMan.py"]
  </code></pre>
  
  <pre><code>src = 'rtsp://admin:....'
  cap = cv2.VideoCapture(self.src)
  cap.isOpened()
  </code></pre>
  
  <p>When i run the container, the last line always returns false. What am i missing?</p>