[whatwg] Media elements statistics
silviapfeiffer1 at gmail.com
Tue May 17 23:19:26 PDT 2011
On Fri, May 6, 2011 at 3:04 AM, Steve Lacey <sjl at chromium.org> wrote:
> On Thu, May 5, 2011 at 2:54 AM, Jeroen Wijering <jeroen at longtailvideo.com>
>> Hey Steve,
>> This looks great; would be a really useful set of data for video players /
>> publishers. Since none of the metrics have a time component, developers can
>> sample the data over the window / at the frequency they prefer.
>> Would jitter be calculated over decodedFrames or
>> decodedFrames+droppedFrames? In the first case, jitter is a more granular
>> metric for measuring exact presentation performance. In the latter case,
>> jitter can serve as a single metric for tracking processing power (simple!).
>> In either case, it's fairly straightforward to calculate towards the other
> Actually, I would expect presentedFrames + droppedFrames would be used. This
> implies all decoded frames that were supposed to be presented.
Do we also expose to the JS developer how many frames we actually
requested, so we can calculate rates?
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