[Webkit-unassigned] [Bug 283545] New: Framerate overshoot in iOS Safari video sender

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=283545

            Bug ID: 283545
           Summary: Framerate overshoot in iOS Safari video sender
           Product: WebKit
           Version: Safari 18
          Hardware: Unspecified
                OS: iOS 18
            Status: NEW
          Severity: Major
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: kagh at microsoft.com

Created attachment 473327

  --> https://bugs.webkit.org/attachment.cgi?id=473327&action=review

Video send FPS in mulitple WebRTC calls

Even if encoder is configured to send max 30 FPS, Safari on iOS still overshoots to around 50 FPS. This problem is not there on other platforms including Safari on Mac. The camera input FPS is smooth and is not overshooting.

I have attached the graphs of different WebRTC calls. One of the graphs show smooth camera input FPS at around 30. The other graph shows video send FPS spikes to around 50 in some calls periodically.

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