title: Can't open video with opencv2
body: <p>I'm trying to grab the images from a video file but I can't succeed to open it and I don't know why.</p>
  
  <p>Below is a code sample that print <code>False</code> where I'm expecting to get a <code>True</code>. I don't get why I can't open this simple video file, any lead would be very much appreciated!</p>
  
  <p>I tried with a relative path first then moved to an absolute path to see if anything changed and it's still the same...</p>
  
  <pre><code>video = cv2.VideoCapture()
  path = "C:\\Users\\Leo\\Dropbox\\Projet VISORD\\TP3\\video.mpg"
  print video.open(path)
  </code></pre>