[Webkit-unassigned] [Bug 190638] Safari is not able to adapt between H264 streams with EditList and without EditList

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=190638

--- Comment #2 from Jer Noble <jer.noble at apple.com> ---
Here's the logging from a debug build of WebKit:

SourceBufferPrivateAVFObjC::layerDidReceiveError(0x553ef7d00): layer(0x7f8d9f75cbb0), error(Error Domain=AVFoundationErrorDomain Code=-11800 "The operation could not be completed" UserInfo={AVErrorMediaSubTypeKey=(
    1635148593
), NSLocalizedDescription=The operation could not be completed, NSLocalizedFailureReason=An unknown error occurred (-8969), AVErrorMediaTypeKey=vide, AVErrorPresentationTimeStampKey=CMTime: {184832/15360 = 12.033}, NSUnderlyingError=0x7f8da0d28030 {Error Domain=NSOSStatusErrorDomain Code=-8969 "codecBadDataErr"}})

Looking for that timestamp in the enqueue log leads to:

SourceBufferPrivateAVFObjC::enqueueSample(0x553ef7d00) - sample({PTS({184320/15360 = 12.000000}), OPTS({184320/15360 = 12.000000}), DTS({184320/15360 = 12.000000}), duration({512/15360 = 0.033333}), flags(1), presentationSize(318.133026x142.000000)})
SourceBufferPrivateAVFObjC::enqueueSample(0x553ef7d00) - sample({PTS({185344/15360 = 12.066667}), OPTS({185344/15360 = 12.066667}), DTS({184320/15360 = 12.000000}), duration({512/15360 = 0.033333}), flags(1), presentationSize(1917.759644x856.000000)})
SourceBufferPrivateAVFObjC::enqueueSample(0x553ef7d00) - sample({PTS({184832/15360 = 12.033333}), OPTS({184832/15360 = 12.033333}), DTS({184832/15360 = 12.033333}), duration({512/15360 = 0.033333}), flags(0), presentationSize(318.133026x142.000000)})
SourceBufferPrivateAVFObjC::enqueueSample(0x553ef7d00) - sample({PTS({186368/15360 = 12.133333}), OPTS({186368/15360 = 12.133333}), DTS({184832/15360 = 12.033333}), duration({512/15360 = 0.033333}), flags(0), presentationSize(1917.759644x856.000000)})

So somehow we are leaving in the decoding queue two sets of samples with the same DTS.

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