[whatwg] Media elements statistics

Mark Watson watsonm at netflix.com
Wed Apr 6 11:52:21 PDT 2011


I added some material to the wiki page based on our experience here at Netflix and based on the metrics defined in MPEG DASH for adaptive streaming. I'd love to here what people think.

Statistics about presentation/rendering seem to be covered, but what should also be considered are network performance statistics, which become increasingly difficult to collect from the server when sessions are making use of multiple servers, possibly across multiple CDNs.

Another aspect important for performance management is error reporting. Some thoughts on that on the page.


On Mar 31, 2011, at 7:07 PM, Robert O'Callahan wrote:

> On Fri, Apr 1, 2011 at 1:33 PM, Chris Pearce <chris at pearce.org.nz> wrote:
>> On 1/04/2011 12:22 p.m., Steve Lacey wrote:
>>> Chris - in the mozilla stats, I agree on the need for a frame count of
>>> frames that actually make it the the screen, but am interested in why we
>>> need both presented and painted? Wouldn't just a simple 'presented' (i.e.
>>> presented to the user) suffice?
>> We distinguish between "painted" and "presented" so we have a measure of
>> the latency in our rendering pipeline. It's more for our benefit as browser
>> developers than for web developers.
> Yeah, just to be clear, we don't necessarily think that everything in our
> stats API should be standardized. We should wait and see what authors
> actually use.
> Rob
> -- 
> "Now the Bereans were of more noble character than the Thessalonians, for
> they received the message with great eagerness and examined the Scriptures
> every day to see if what Paul said was true." [Acts 17:11]

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