How to add custom video property to WebRTC SDP?

Question

Is there a way to add custom video property to SDP? We would like to inform that transmitted video should be cropped to fit the remote screen.

As we are using Janus videoroom plugin also this information must be preserved after passing it.

Answer 1

Regarding Janus, it is not possible. See https://groups.google.com/forum/#!topic/meetecho-janus/Hj1vnR7ZPiw.

Answer 2

It is possible after this article.