[Webkit-unassigned] [Bug 231461] New: Black (horizontal) box in portrait orientation for getUserMedia camera feed on iPhones

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=231461

            Bug ID: 231461
           Summary: Black (horizontal) box in portrait orientation for
                    getUserMedia camera feed on iPhones
           Product: WebKit
           Version: Safari 15
          Hardware: iPhone / iPad
                OS: Unspecified
            Status: NEW
          Severity: Critical
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: teodor.atroshenko at gmail.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

Created attachment 440686

  --> https://bugs.webkit.org/attachment.cgi?id=440686&action=review

Captured on iPhone 11 Pro, iOS 15

Safari on iOS 15 has a black horizontal outline when rendering own camera feed and when the screen is in portrait mode. Rotating the phone into landscape orientation "hides" the black box.

This is almost certainly related to how the current version of Safari interprets (or does not interpret) the orientation bits in the video stream.

Here is a test page: https://beaconx.com/data/apple-black-outline.html

This is affecting production apps. User experience is significantly degraded - the video of the other call participants (for video conferencing scenarios) are being covered by the black box.

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