[Webkit-unassigned] [Bug 242681] New: Adopt kCMSampleBufferAttachmentKey_FillDiscontinuitiesWithSilence

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=242681

            Bug ID: 242681
           Summary: Adopt
                    kCMSampleBufferAttachmentKey_FillDiscontinuitiesWithSi
                    lence
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jean-yves.avenard at apple.com

Test case:
https://jyavenard.github.io/htmltests/tests/mse_webm/83910012/

In this sample, we have a 1ms audio discontinuity appearing at t=20ms however due to an implementation detail can be heard at t=2s.

In bug 234458, we applied a workaround so that the silence is inserted right when the discontinuity is occurring, which makes it less audible.

The audio dropout is due to the audio layer inserting silence when a gap is encountered ; however there's no real gap in the audio content, just that the timestamp in the container are nonsensical.

By adopting the key kCMSampleBufferAttachmentKey_FillDiscontinuitiesWithSilence we could tell the audio layer to not insert those silences.

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