[Urgent] All current versions (<4.0.1) do not work in Chrome 69+ !!

[Urgent] All current versions (<4.0.1) do not work in Chrome 69+ !!

I had a shock when I stopped being able to broadcast my webcam on my website using version 3.5.2 .

I am still making the upgrade to version 4.0.1, so I checked on version 4.0 and the same problem occurs! I haven't tested 4.0.1 yet but since it was a minor upgrade I assume it is also dysfunctioning.

Chrome Beta (69), and Chrome Canary (70) are both unable to receive streams with intel webrtc (tested on Windows 7 and 10). So far, creating a stream seems to work fine. Here is the error message in the chrome console, with the basic example:

Uncaught (in promise) DOMException: Failed to execute 'addTransceiver' on 'RTCPeerConnection': This operation is only supported in 'unified-plan'. 'unified-plan' will become the default behavior in the future, but it is currently experimental. To try it out, construct the RTCPeerConnection with sdpSemantics:'unified-plan' present in the RTCConfiguration argument. at 

It seems Google Chrome is switching to a "unified-plan" way of signalling (or something?) by the next version of Chrome Stable, which is likely due out in early September!

Does anyone know any easy fixes for version 3.5.2 and 4.0.1 ? Is the intel webrtc team aware of this and will push an update soon? I assume the update will only be available for 4.0 + correct? I am a little worried as well over 90% of my users use Chrome.

Thanks for your help.

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I can confirm that version 4.0.1 also not working.

I'm starting to get worried by the lack of response so far. I need some information on whether this is going to be fixed in time for Chrome's release.

Hi Stephen and Mark,

Thanks for reporting this issue. It seems that "addTransceiver" is not longer available in "Plan B". We're working on a fix for this.

Hello Jianjun,

It would be really great, if you could let us know when we can expect the fix.


Hi Narayanan,

A patch for 4.0.x has been developed to fix this issue. QA is validating this change. We hope it could be rolled out no later than the end of next week.



we use version 3.4, how can we solve the problem?



Hi David,

We don't have a plan to develop a patch release for 3.x so far. But we are considering to provide a workaround for 3.x in the near future. Thanks.

I appreciate your work. I'm very quickly trying to messily upgrade my site to 4.0 in anticipation for the patch!

Currently Chrome 69 is scheduled to be released on September the 4th, which is very soon!

Hi Stephen,

We released 4.0.2 last week. This issue should be fixed.

Any news about a patch for 3.x?

Hi, Polyakov,

Please take a look at the workaround here. https://software.intel.com/en-us/forums/intel-collaboration-suite-for-we...

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