Webrtc - Issue with upgrading to video while one client offline

[Manuel Freites]

Hello all,

I am trying to solve an issue that happens when 2 peers join a call without video, then while one of the peers loses connection, both enables video. The issue that I am seeing is that once the peer reconnects, video is not visible from either side. I would like some advice on this.

I tried this on Chrome Version 142.0.7444.163

Steps

1) Both peers join audio call (Peer1 and Peer2)

2) Peer2 loses connection ( Turn WIFI / Disable network adapter)

3) While disconnected, both peers upgrade to video (Get Camera track and tries to negotiate)

4) Wait up to 1 minute disconnected

5)  Reconnect with peer2 (Turn on WiFI/ Enable network adapter)

I created a sample app that tries to restartIce, After it successfully connected, signaling state is in stable and ice connection state is connected but outbound video stats from both sides shows 0 bytes sent.

I need advice on this. 

Please see how I am rolling back offer if I don't get an answer in 5 seconds

[Harald Alvestrand]

This seems to be a Chrome bug. Can you file a bug on issues.webrtc.org and include the SDP that is being sent between the parties?

Also check chrome://webrtc-internals to see if frames are being sent and/or received by either party.

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[Manuel Freites]

Thanks, I created issue https://issues.webrtc.org/issues/461836632

for completeness, I see stats outbount-rtp for video with 0 bytes sent in both sides. I do see SDPs does includes video. 

Best regards,

Manuel Freites