RESOLVED FIXED 262972
keyFramesDecoded > 0 while framesDecoded == 0 
https://bugs.webkit.org/show_bug.cgi?id=262972
Summary keyFramesDecoded > 0 while framesDecoded == 0
ronakk
Reported 2023-10-10 12:27:31 PDT
Hi Folks, Our WebRTC based application has seen an increase in failed sessions after the iOS 17 update. After some debugging we noticed that on iPhone for all failure sessions the number of keyFramesDecoded is > 0 while the number of framesDecoded == 0. According to the WebRTC standard this should not be possible: "This is a subset of framesDecoded. framesDecoded - keyFramesDecoded gives you the number of delta frames decoded.", so this seems to be a bug in the Safari WebRTC implementation on iOS17.
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:fippo
Comment 1 2023-10-10 23:18:59 PDT
that particular statistic in libWebRTC has been wrong, the fix is coming to webrtc M118 as noted in https://groups.google.com/g/discuss-webrtc/c/6FL4yW3UdZg
youenn fablet
Comment 2 2023-10-11 07:46:59 PDT
As per fippo's link, the device receives key frames but apparently the decoding fails. @ronakk, any more information you can share with us? It might be difficult to investigate without additional info.
Radar WebKit Bug Importer
Comment 3 2023-10-11 07:54:39 PDT
<rdar://problem/116810102>
youenn fablet
Comment 4 2023-10-12 03:53:56 PDT
Pull request: https://github.com/WebKit/WebKit/pull/18991
EWS
Comment 5 2023-10-12 09:24:53 PDT
Committed 269258@main (248020847da1): <https://commits.webkit.org/269258@main> Reviewed commits have been landed. Closing PR #18991 and removing active labels.
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