[Webkit-unassigned] [Bug 175472] WebRTC video does not resume receiving when switching back to Safari 11 on iOS

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Wed Aug 16 19:20:55 PDT 2017


--- Comment #20 from youenn fablet <youennf at gmail.com> ---
(In reply to Andrew Morris from comment #19)
> @youenn: Oh actually, I know the one you mean, it only shows over the video
> if you have focus. This one right?
> https://bugs.webkit.org/attachment.cgi?id=318316
> Anyway, I think I know what is happening. When switching to the background,
> decoding stops. That means when you resume, a keyframe is needed. Disabling
> and enabling the video using the icon above triggers a keyframe and
> unfreezes the video. If a new participant joins, a keyframe is generated for
> the new user, and incidentally is sent to everyone, which also unfreezes the
> video.

This is my hypothesis too.
But, then video should be coming back after 1 minute too, no?

> I think Safari should send a keyframe request when it resumes decoding, and
> this will fix it. Wdyt?

Yes, I think we need to fix that.

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