[cypher543]

Probably not much. The WebRTC reference implementation[1] by Google and Mozilla is fairly easy to build and embed, assuming your Internet connection can handle a complete checkout of the Chromium repository. Unfortunately it only supports the VP8 codec for video. There is also OpenWebRTC[2] by Ericsson, but it doesn't work on Windows.

[1]: http://www.webrtc.org/native-code/development

[2]: http://www.openwebrtc.io/

[dharma1]

There's VP9 too - https://plus.google.com/+JustinUberti/posts/3FLVapCvDaG