WebRTC plugin free screen sharing / Demo

Share entire screen directly without any single installation!

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Enable screen capture support in getUserMedia()

1. Open chrome://flags in the latest chrome (canary/beta).
2. Scroll to the bottom of the page.
3. Enable flag Enable screen capture support in getUserMedia()

That flag allows web pages to request access to the screen contents via the getUserMedia() API.

var video_constraints = {
    mandatory: { chromeMediaSource: 'screen' },
    optional: []
};
navigator.webkitGetUserMedia({
    audio: false,
    video: video_constraints
}, onstreaming, onfailure);

There is another experiment: WebRTC Tab Sharing using experimental tabCapture APIs

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What about Desktop Sharing?

It is a big wish to share desktop using RTCWeb peer connection APIs but unfortunately currently it is not possible.

Current experiment is using chrome screen sharing APIs (media/constraints) which allows end-users to view the screen....nothing else!

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Test it on HTTPS. Because, screen capturing (currently) only works on SSL domains.

Chrome denies request automatically in the following cases:

1. Screen capturing is not enabled via command line switch. mandatory: {chromeMediaSource: 'screen'} must be there

2. Audio stream was requested (it's not supported yet).

navigator.webkitGetUserMedia({
	audio: false	/* MUST be false because audio capturer not works with screen capturer */
});

3. Request from a page that was not loaded from a secure origin.

Here is their C++ code that denies screen capturing:

if (!screen_capture_enabled ||
	request.audio_type != content::MEDIA_NO_SERVICE ||
	!request.security_origin.SchemeIsSecure()) {
		callback.Run(content::MediaStreamDevices());
		return;
	}

Personally I don’t know why they deny non-SSL requests. Maybe they’re using iframes in sandbox mode or something else that runs only on HTTPS.

Browsers who don't understand {chromeMediaSource: 'screen'} constraint will simply get video like chrome stable or Firefox.

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For signaling; please check following page:

https://github.com/muaz-khan/WebRTC-Experiment/blob/master/Signaling.md

Remember, you can use any signaling implementation exists out there without modifying any single line! Just skip below code and open above link!

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Browser Support

WebRTC plugin free screen sharing experiment works fine on following web-browsers:

Browser	Support
Firefox	Stable / Aurora / Nightly
Google Chrome	Stable / Canary / Beta / Dev
Android	Chrome Beta

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License

WebRTC plugin free screen sharing experiment is released under MIT licence . Copyright (c) 2013 Muaz Khan.