title: Demo needs OpenCV for webcam images
body: <p>I am trying to do object detection using YOLO from the official website:<a href="https://pjreddie.com/darknet/yolo/" rel="nofollow noreferrer">https://pjreddie.com/darknet/yolo/</a>
  But I cannot integrate OpenCV with it though I have already install OpenCV in my both python version python and python3
  her is the error:</p>
  
  <pre><code>rajan@RGR:~/darknet$ ./darknet detector demo cfg/coco.data cfg/yolov3.cfg yolov3.weights videosample.mp4
  Demo needs OpenCV for webcam images.
  </code></pre>
  
  <p>so can anyone help me to solve this, I have been trying to solve it for more than a week but I could not do it. I would be glad if someone gives me the solution. thank you in advance.</p>