title: gstreamer create virtual device on OSX
body: <p>I would like to create a virtual camera device using gstreamer on OSX </p>
  
  <p>I am able to create it on *nix systems using</p>
  
  <pre><code> gst-launch-1.0 -v videotestsrc pattern=snow ! video/x-raw,width=1280,height=720 ! v4l2sink device=/dev/video1
  </code></pre>
  
  <p>On osx I get a erroneous pipeline <code>v4l2</code></p>
  
  <p>I would like to be able to pipe the output into applications such as skype etc., </p>
  
  <p>Any pointers in this direction ? Should I use syphon?  </p>