title: Why does OpenCV give me a black screen?
body: <p>I'm currently trying to use OpenCV (using the Processing library). 
  However, when I try to run any examples (either the Processing ones or the C ones included with OpenCV), I see nothing but black instead of input from the camera. The camera's LED indicator does turn on.. has anyone had the same problem? is my camera somehow incompatible with openCV? It's an Acer Crystal Eye...</p>
  
  <p>Thanks,</p>