Bug 238366

Summary:

iOS Safari (h264) - unable to have HD quality calls (limited by 500kbs)

Product:

WebKit

Reporter:

Andrey <andrey>

Component:

WebRTC

Assignee:

Nobody <webkit-unassigned>

Status:

NEW

Severity:

Blocker

CC:

dan, eric.carlson, kyle, webkit-bug-importer, youennf

Priority:

Keywords:

InRadar

Version:

Safari 15

Hardware:

iPhone / iPad

OS:

iOS 15

See Also:

https://bugs.webkit.org/show_bug.cgi?id=240336

Attachments:

Description	Flags
Here is a screen from stats that demonstrates impact of than feautre	none

Andrey

Reported 2022-03-25 00:50:26 PDT

Created attachment 455736 [details] Here is a screen from stats that demonstrates impact of than feautre Impossible to have HD quality call on Safari(h264) without disabling "Webrtc h264 low latency encoder" experimental feature(which is enabled by default) Webrtc h264 low latency encoder (enabled) - maximum bitrate is 500kps Webrtc h264 low latency encoder (disabled) - maximum bitrate is 2000kps

Attachments
Here is a screen from stats that demonstrates impact of than feautre (390.40 KB, image/png) 2022-03-25 00:50 PDT, Andrey	no flags	Details
View All Add attachment proposed patch, testcase, etc.

youenn fablet

Comment 1 2022-03-25 00:59:47 PDT

<rdar://90184036>

Dan Jenkins

Comment 2 2022-04-14 05:52:55 PDT

Hey @youenn , were you able to reproduce this one? Do you need any more info on it?

youenn fablet

Comment 3 2022-04-14 06:06:40 PDT

(In reply to Dan Jenkins from comment #2) > Hey @youenn , were you able to reproduce this one? Do you need any more info > on it? We think we have a fix. I'll try to comment on the bug when this will be testable.

Dan Jenkins

Comment 4 2022-04-14 06:08:02 PDT

(In reply to youenn fablet from comment #3) > (In reply to Dan Jenkins from comment #2) > > Hey @youenn , were you able to reproduce this one? Do you need any more info > > on it? > > We think we have a fix. I'll try to comment on the bug when this will be > testable. thank you! :)

Kyle Foley

Comment 5 2022-05-12 07:52:18 PDT

Is there a possibility this bug could effect native calls as well? We're seeing our native WebRTC app (using H264) being capped at 100kbs after the release of iOS 15.4 on all iOS devices.

youenn fablet

Comment 6 2022-05-12 08:39:54 PDT

(In reply to Kyle Foley from comment #5) > Is there a possibility this bug could effect native calls as well? We're > seeing our native WebRTC app (using H264) being capped at 100kbs after the > release of iOS 15.4 on all iOS devices. Yes, can you try the latest iOS 15.5 beta?

Kyle Foley

Comment 7 2022-05-12 08:47:25 PDT

We still have poor video quality on the latest 15.5 beta. Frame rate is around 60fps, but bitrate is very low. Let me know if you'd like me to attach any supporting data

Kyle Foley

Comment 8 2022-05-12 08:59:18 PDT

I just tested in Safari using h264. iOS 15.5 beta does fix the issue in Safari, the video is crystal clear. Althought our native app still has terrible quality. The image quality on 15.4 Safari exactly matches the video quality on 15.5 native app, if that makes sense.

Kyle Foley

Comment 9 2022-05-20 11:23:52 PDT

15.6 beta 1 does not fix this issue either

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