Bug 238366 - iOS Safari (h264) - unable to have HD quality calls (limited by 500kbs)
Summary: iOS Safari (h264) - unable to have HD quality calls (limited by 500kbs)
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: WebRTC (show other bugs)
Version: Safari 15
Hardware: iPhone / iPad iOS 15
: P2 Blocker
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2022-03-25 00:50 PDT by Andrey
Modified: 2022-05-20 11:23 PDT (History)
5 users (show)

See Also:

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
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Description Andrey 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
Comment 1 youenn fablet 2022-03-25 00:59:47 PDT 
<rdar://90184036>
Comment 2 Dan Jenkins 2022-04-14 05:52:55 PDT 
Hey @youenn , were you able to reproduce this one? Do you need any more info on it?
Comment 3 youenn fablet 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.
Comment 4 Dan Jenkins 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! :)
Comment 5 Kyle Foley 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.
Comment 6 youenn fablet 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?
Comment 7 Kyle Foley 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
Comment 8 Kyle Foley 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.
Comment 9 Kyle Foley 2022-05-20 11:23:52 PDT 
15.6 beta 1 does not fix this issue either