[Webkit-unassigned] [Bug 214689] New: getUserMedia aspectRatio overconstrained in portrait orientation

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=214689

            Bug ID: 214689
           Summary: getUserMedia aspectRatio overconstrained in portrait
                    orientation
           Product: WebKit
           Version: Safari 13
          Hardware: iPhone / iPad
                OS: iOS 13
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebRTC
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: kpd400 at gmail.com
                CC: youennf at gmail.com

Created attachment 405046

  --> https://bugs.webkit.org/attachment.cgi?id=405046&action=review

Demo of aspect ratio bug in portrait mode

I have a use case that requires me to get a 4:3 video from getUserMedia on iPad / iOS devices. I can do this reliably when the device is in landscape by setting the `aspectRatio` constraint to 4/3 but when the device is in portrait (thus requiring a relative 3/4 aspect ratio) an `OverconstrainedError: Invalid constraint` error is thrown.

If I specify exact dimensions, e.g. 640x480 in landscape or 480x640 in portrait, I am able to obtain a 4:3 video regardless of orientation but this requires exact dimensions which is problematic when trying to obtain a maximum camera resolution that may or may not be supported by the device.

I am using an iPad Pro (12.9-inch) (3rd generation) on iPadOS 13.6 and I have attached a demo to reproduce the issue when tested on a mobile device in portrait mode.

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