[Bug 12399] <video> add bytesReceived, downloadTime, and networkWaitTime metrics

https://www.w3.org/Bugs/Public/show_bug.cgi?id=12399

--- Comment #42 from Silvia Pfeiffer <silviapfeiffer1@gmail.com> 2012-05-09 02:29:47 UTC ---
(In reply to comment #40)
> Silvia: So to confirm, you're agreeing that bytesReceived, downloadTime, and
> networkWaitTime are not media-specific and that we should move them to a
> WebPerf API rather than HTMLMediaElement?

I've spoken with some others and we agree that these three are not
media-specific and could be progressed in WebPerf.



We have also identified that a generic DroppedFrames measure for video is
important so Web Devs can get information about how good the quality of
playback is that the users are seeing. It basically signals how much "system
bandwidth" is available for video. Web Devs can gather these stats to make a
better informed decision on which bitrate resource to choose for start of the
next video's playback, they can switch to alternative lower bitrate resources
mid-stream, or inform the user to close other apps, and build a profile of
typical bandwidth cases to decide on which bitrates to encode resources into.
The DroppedFrames metric is already available in WebKit through the
webkitDroppedFrames attribute and in Firefox through (mozPaintedFrames -
mozParsedFrames).

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Received on Wednesday, 9 May 2012 02:29:51 UTC