Licode with a custom stream?



I am a newbie in Licode and I need to do something

I would like to share a part of my html page (not my screen, not my camera) but a html canvas. I can use “canvas.captureStream()” for create a regular stream and this stream work with a “standard” peer connexion.
How can i do this ? Can I push my custom stream in " Erizo.Stream() "

I don’t know if Licode is the best service for this, if I can’t build my app any idea for others solutions ?