[Webkit-unassigned] [Bug 219588] New: WebRTC using H.264 on M1 Macs with a built-in camera crashes

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Sun Dec 6 20:52:23 PST 2020


https://bugs.webkit.org/show_bug.cgi?id=219588

            Bug ID: 219588
           Summary: WebRTC using H.264 on M1 Macs with a built-in camera
                    crashes
           Product: WebKit
           Version: Safari 14
          Hardware: Macintosh
                OS: macOS 10.15
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebRTC
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: kev at bibo.com.ph
                CC: youennf at gmail.com

Created attachment 415536

  --> https://bugs.webkit.org/attachment.cgi?id=415536&action=review

Safari WebRTC h.264 crash

WebRTC in Safari and Safari Technology Preview on M1 MacBooks crashes when the codec used is H.264.

Reproduction example:

https://codepen.io/brainshave/pen/qBBWEpM

This codepen allows you to select which codecs will be used to mirror you camera back you. On M1 Macs with a built-in camera,
selecting H.264 and running the example will crash the page. You can uncheck "H.264" and run the example to see that VP8 and VP9 do not exhibit this behavior. This is 100% reproducable for me on a MacBook Air with an M1 chip. This happens in both Safari 14.0.1 (16610.2.11.51.8) and Release 116 (Safari 14.1, WebKit 16611.1.5.3) of Safari Technology Preview.

This crash doesn't occur in Chrome's Apple silicon build, even with H.264 selected.

A crash report from Safari is attached.

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