Bug 225295

Summary:	iOS negotiates h264 high profile but fails to encode it
Product:	WebKit	Reporter:	geir.bakke
Component:	WebRTC	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED CONFIGURATION CHANGED
Severity:	Normal	CC:	webkit-bug-importer, youennf
Priority:	P2	Keywords:	InRadar
Version:	Safari 14
Hardware:	iPhone / iPad
OS:	iOS 14

geir.bakke

Reported 2021-05-03 02:27:09 PDT

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?).

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Radar WebKit Bug Importer

Comment 1 2021-05-03 04:04:20 PDT

<rdar://problem/77450281>

youenn fablet

Comment 2 2021-05-03 06:43:26 PDT

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?

geir.bakke

Comment 3 2021-05-03 23:49:34 PDT

Hi Youenn, I'm reproducing on whereby.com using small room (P2P), 2 participants, iPhone XR safari, Macbook pro intel safari.

youenn fablet

Comment 4 2021-05-05 02:50:52 PDT

As discussed offline with Geir, this is fixed in latest iOS 14.5 release

youenn fablet

Comment 5 2021-05-10 00:31:28 PDT

Reopened for further investigation

youenn fablet

Comment 6 2021-05-17 01:57:32 PDT

Worth checking out iOS 14.6 beta.

youenn fablet

Comment 7 2021-06-07 08:03:40 PDT

I believe this is fixed in iOS 14.6

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