[Webkit-unassigned] [Bug 230604] New: iPadOS 15 / iOS 15 unable to decode VP9 stream

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=230604

            Bug ID: 230604
           Summary: iPadOS 15 / iOS 15 unable to decode VP9 stream
           Product: WebKit
           Version: Other
          Hardware: iPhone / iPad
                OS: Other
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebRTC
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dan at nimblea.pe
                CC: youennf at gmail.com

Using apprtc we're able to reproduce this issue

Both Safari Tech Preview and iOS 15/iPadOS 15 should be able to send and receive VP9 now.

I used https://appr.tc/?hd=true&vsc=vp9&vrc=VP9 to reproduce

I was able to reproduce the issue using Chrome Canary and Safari Tech Preview.

Expected result - you send video and receive video
Current result - on Chrome/STP you can see both sending and receiving streams, on iPadOS 15 and iOS 15 Safari you only see the sending stream.

Logs can be found over on a github gist - https://gist.github.com/danjenkins/ead6e9be8984c286e1727399a00b4766

You can see the RTCRtpReceiver says it can receive VP9 in the output from the console.

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