225295 2021-05-03 02:27:09 -0700 iOS negotiates h264 high profile but fails to encode it 2021-06-07 08:03:40 -0700 1 1 1 Unclassified WebKit WebRTC Safari 14 iPhone / iPad iOS 14 RESOLVED CONFIGURATION CHANGED InRadar P2 Normal --- 1 geir.bakke webkit-unassigned webkit-bug-importer youennf oldest_to_newest 1756126 0 geir.bakke 2021-05-03 02:27:09 -0700 Setting up peerConnections between desktop safari and iphone safari (possibly iOS<>iOS as well), they seem to negotiate and use h264 high profile. iOS is not sending any data but receives and renders just fine. Removing high profile by sdp munging seems to fix it partially - but then iOS stutters and sends lots of PLIs (related to #195124?). 1756142 1 webkit-bug-importer 2021-05-03 04:04:20 -0700 <rdar://problem/77450281> 1756160 2 youennf 2021-05-03 06:43:26 -0700 I tried to do it using whereby.com website with my iMacPro and iPhone 12 but did not repro the issue. @geir, can you give repro steps or the devices that had the issues? 1756453 3 geir.bakke 2021-05-03 23:49:34 -0700 Hi Youenn, I'm reproducing on whereby.com using small room (P2P), 2 participants, iPhone XR safari, Macbook pro intel safari. 1756879 4 youennf 2021-05-05 02:50:52 -0700 As discussed offline with Geir, this is fixed in latest iOS 14.5 release 1758439 5 youennf 2021-05-10 00:31:28 -0700 Reopened for further investigation 1760696 6 youennf 2021-05-17 01:57:32 -0700 Worth checking out iOS 14.6 beta. 1767443 7 youennf 2021-06-07 08:03:40 -0700 I believe this is fixed in iOS 14.6