title: Accomplish screen sharing using WebRTC
body: <p>I need to implement screen sharing using WebRTC. I know that WebRTC supports sharing of tab content but I need to share the whole screen.
  A solution I am thinking of is to frequently take screenshots and using WebRTC data channel transfer the image to other party. The other party will then update the image each time a new image is received.</p>
  
  <p>Is this possible to accomplish? Particularly I am wondering if it is possible to transfer image using WebRTC data channel? </p>
  
  <p>Thank you in advance.</p>