Please find the attachment for the WebRtc_Internal dump 

Deleted: webrtc_internals_dump (3).txt 76.1 KB

webrtc_internals_dump (3).txt 76.1 KB View Download

The Profile-level-id was not matching with chrome so call was failing.

I suspect that this might be WAI. Can you comment, magjed?

Chrome only supports Constrained Baseline Profile[42E0],  But we are using Baseline Profile "4280", when this support will be added.

I'm experiencing this issue with iOS 11.1.2 on iPad mini to Chrome 62.0.3202.84 on Android 7. I suspect as well this is a H264 issue.

"OperationError: Failed to set remote offer sdp: Session error code: ERROR_CONTENT. Session error description: Failed to set remote video description send parameters.."

I think this is due to incompatible video codec. Not sure if Android is capable of H264 as I believe that iOS will ONLY support H264

If this is correct, does this mean that it will be impossible to connect these two platforms using WebRTC until an agreement on video codec is met? 

Android and iOS now negotiate Baseline profile, using their HW codecs, so this should work now. Can you verify?

The SDP passed from Android to iOS (S8 with Android 7 with Chrome 62.0.3202.84) and iOS 11.2 beta 4 under Safari (iPad mini) is:

v=0
o=- 2792111575520691438 2 IN IP4 127.0.0.1
s=-
t=0 0
a=group:BUNDLE audio video
a=msid-semantic: WMS LopLZ9fYBttbr1htxE7TSNe91fIcBdGnZqEM
m=audio 9 UDP/TLS/RTP/SAVPF 111 103 9 0 8 105 13 110 113 126
c=IN IP4 0.0.0.0
a=rtcp:9 IN IP4 0.0.0.0
a=ice-ufrag:Y5EM
a=ice-pwd:2Gjy25MP1l5ZK3UhT7paYq8Z
a=ice-options:trickle
a=fingerprint:sha-256 6B:E0:F5:5D:7D:8F:67:D8:D2:45:15:9C:85:0C:D7:97:10:39:4C:4F:C7:96:0A:7B:3B:60:41:23:72:E3:78:04
a=setup:actpass
a=mid:audio
a=extmap:1 urn:ietf:params:rtp-hdrext:ssrc-audio-level
a=sendrecv
a=rtcp-mux
a=rtpmap:111 opus/48000/2
a=rtcp-fb:111 transport-cc
a=fmtp:111 minptime=10;useinbandfec=1
a=rtpmap:103 ISAC/16000
a=rtpmap:9 G722/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:105 CN/16000
a=rtpmap:13 CN/8000
a=rtpmap:110 telephone-event/48000
a=rtpmap:113 telephone-event/16000
a=rtpmap:126 telephone-event/8000
a=ssrc:432575685 cname:75ZBlhQrw+If2vHJ
a=ssrc:432575685 msid:LopLZ9fYBttbr1htxE7TSNe91fIcBdGnZqEM c9dd542f-5118-46d5-819a-41a305a26602
a=ssrc:432575685 mslabel:LopLZ9fYBttbr1htxE7TSNe91fIcBdGnZqEM
a=ssrc:432575685 label:c9dd542f-5118-46d5-819a-41a305a26602
m=video 9 UDP/TLS/RTP/SAVPF 96 97 98 99 100 101 102 127 104
c=IN IP4 0.0.0.0
a=rtcp:9 IN IP4 0.0.0.0
a=ice-ufrag:Y5EM
a=ice-pwd:2Gjy25MP1l5ZK3UhT7paYq8Z
a=ice-options:trickle
a=fingerprint:sha-256 6B:E0:F5:5D:7D:8F:67:D8:D2:45:15:9C:85:0C:D7:97:10:39:4C:4F:C7:96:0A:7B:3B:60:41:23:72:E3:78:04
a=setup:actpass
a=mid:video
a=extmap:2 urn:ietf:params:rtp-hdrext:toffset
a=extmap:3 http://www.webrtc.org/experiments/rtp-hdrext/abs-send-time
a=extmap:4 urn:3gpp:video-orientation
a=extmap:5 http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions-01
a=extmap:6 http://www.webrtc.org/experiments/rtp-hdrext/playout-delay
a=extmap:7 http://www.webrtc.org/experiments/rtp-hdrext/video-content-type
a=extmap:8 http://www.webrtc.org/experiments/rtp-hdrext/video-timing
a=sendrecv
a=rtcp-mux
a=rtcp-rsize
a=rtpmap:96 VP8/90000
a=rtcp-fb:96 ccm fir
a=rtcp-fb:96 nack
a=rtcp-fb:96 nack pli
a=rtcp-fb:96 goog-remb
a=rtcp-fb:96 transport-cc
a=rtpmap:97 rtx/90000
a=fmtp:97 apt=96
a=rtpmap:98 VP9/90000
a=rtcp-fb:98 ccm fir
a=rtcp-fb:98 nack
a=rtcp-fb:98 nack pli
a=rtcp-fb:98 goog-remb
a=rtcp-fb:98 transport-cc
a=rtpmap:99 rtx/90000
a=fmtp:99 apt=98
a=rtpmap:100 red/90000
a=rtpmap:101 rtx/90000
a=fmtp:101 apt=100
a=rtpmap:102 ulpfec/90000
a=rtpmap:127 H264/90000
a=rtcp-fb:127 ccm fir
a=rtcp-fb:127 nack
a=rtcp-fb:127 nack pli
a=rtcp-fb:127 goog-remb
a=rtcp-fb:127 transport-cc
a=fmtp:127 level-asymmetry-allowed=1;packetization-mode=1;profile-level-id=42001f
a=rtpmap:104 rtx/90000
a=fmtp:104 apt=127
a=ssrc-group:FID 3175622802 2713831672
a=ssrc:3175622802 cname:75ZBlhQrw+If2vHJ
a=ssrc:3175622802 msid:LopLZ9fYBttbr1htxE7TSNe91fIcBdGnZqEM 9dde4b53-387b-425e-b9b0-28bb7edebe31
a=ssrc:3175622802 mslabel:LopLZ9fYBttbr1htxE7TSNe91fIcBdGnZqEM
a=ssrc:3175622802 label:9dde4b53-387b-425e-b9b0-28bb7edebe31
a=ssrc:2713831672 cname:75ZBlhQrw+If2vHJ
a=ssrc:2713831672 msid:LopLZ9fYBttbr1htxE7TSNe91fIcBdGnZqEM 9dde4b53-387b-425e-b9b0-28bb7edebe31
a=ssrc:2713831672 mslabel:LopLZ9fYBttbr1htxE7TSNe91fIcBdGnZqEM
a=ssrc:2713831672 label:9dde4b53-387b-425e-b9b0-28bb7edebe31

Yeah, that's H264 Baseline profile.

FYI: Just filed a related bug https://bugs.chromium.org/p/webrtc/issues/detail?id=8584