[Webkit-unassigned] [Bug 173262] New: No Simulcast support in WebRTC

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=173262

            Bug ID: 173262
           Summary: No Simulcast support in WebRTC
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: gustavogb at gmail.com

Overview:
I seems like Safari TP 33 has no support for simulcast streaming, which would be required for multiparty scenarios.  This is supported in Chrome and Firefox for VP8 and there is a patch in progress to add support also for H.264 [1]

The standard way to add simulcast support would be using RtpSender encodings + RID header extensions in the RTP packets [2]

Actual Result:
There is no way to enable simulcast in Safari for H.264.

Expected Result:
Safari supports simulcast for H.264 (and also VP8 if support for that is eventually added)

Build Date & Hardware:
Safari TP 33 on macOS 10.12.5

[1] https://bugs.chromium.org/p/webrtc/issues/detail?id=5840
[2] https://www.w3.org/TR/webrtc/#simulcast-example

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