HTML 5 how to record filtered canvas

I am gonna use my webcam as a source and show my view on webpage , than I will manipulate my view like (blacknwhite , fiseye, etc.) and show that manipulated video in my canvas. An example ( http://ift.tt/18Rd6I8 )

Ok everything is cool for now . I can capture that manipulated canvas as a image.

Is there any way to record that manipulated canvas as video?

I also found an example (http://ift.tt/1BKQHYG)

But when I tried that code on my webcam recording project , it's just recording my source view(not blacknwhite) . It is not implementing my effect to record.

Any idea or is it possible ? Thank you.