Bug with screen sharing with RTCMulticonnection from Chrome to Mozilla

Question

I am creating p2p application to share video and screen from Chrome to Mozilla. When I work with Chrome on both sides, it works fine. But when Mozilla is receiving screensharing video, I get a problem.

To start screenshare I do the following in Chrome:

connection.addStream({screen: true, oneway: true}

On the client side I have this callback:

connection.onstream = function (e) {
 // handle input stream
}

With Mozilla this callback is not launched, but I see flickering on my main webcam stream: few frames from webcam and few frames from screenshare continiously.

How can I fix this? Is this Mozilla bug?

score 2 · Answer 1 · answered Dec 04 '16 at 08:08

2

it you're adding more than one stream to a single peerconnection, you may be hitting the fact that Chrome and Firefox support different dialects of SDP.

Unless you do translation of the SDP, you'll have to use different peerconnections until the chrome bug is fixed.

answered Dec 04 '16 at 08:08

Philipp Hancke

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Philipp, is there any sample code/other evidence that it is possible to hack SDP? – Stepan Yakovenko Dec 04 '16 at 18:00
Well, it doesnt work, it crashes as expplained here: https://github.com/jitsi/sdp-interop/issues/4 – Stepan Yakovenko Mar 21 '17 at 14:24

score 0 · Accepted Answer · answered May 06 '17 at 11:17

My solution was migrating to SimpleRTC (http://simplewebrtc.com). This is same sort of library, but it is updated regularly to reflect browsers/API changes. The challange was signalling layer, because it uses special (opensource) library on top of socketio to handle chat rooms. But now screensharing works correctly.

Bug with screen sharing with RTCMulticonnection from Chrome to Mozilla

2 Answers2