title: Is OpenCv already threaded?
body: <p>I want to use <a href="http://docs.opencv.org/" rel="noreferrer">OpenCV</a> in order to record a video and send it as a stream. I'm a beginner and I need to know if OpenCV blocks the main thread or is it threaded itself ?</p>
  
  <p>I read OpenCV documentation (2.4.9) and I couldn't find any answer.</p>
  
  <p>Thanks for reading.</p>