New example: capturing RTP streams?

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Someone asked whether it was possible to capture RTP streams.

RTP is not a protocol browsers understand directly. Browsers understand WebRTC and that's where we can get streams that we can record with MediaRecorder.

If we want to capture an RTP stream we need a server that transforms the RTP stream into a WebRTC stream.

Here's an example of doing this http://www.codeproject.com/Articles/800910/Broadcasting-of-a-Video-Stream-from-an-IP-camera-U ... and it looks fairly complex, but if someone can build a simpler example that would be great to have handy.