[whatwg] Video playback quality metric

Robert O'Callahan robert at ocallahan.org
Mon Feb 9 14:27:56 PST 2009

On Tue, Feb 10, 2009 at 10:13 AM, Jeremy Doig <jeremydo at google.com> wrote:

> Measuring the rate at which the playback buffer is filling/emptying gives a
> fair indication of network goodput, but there does not appear to be a way to
> measure just how well the client is playing the video itself. If I have a
> wimpy machine behind a fat network connection, you may flood me with HD that
> I just can't play very well. The cpu or video card may just not be able to
> render the video well. Exposing a metric (eg: Dropped Frame count,
> rendered frame rate) would allow sites to dynamically adjust the video which
> is being sent to a client [eg: switch the url to a differently encoded file]
> and thereby optimize the playback experience.
> Anyone else think this would be good to have ?

Yes, I do.

"He was pierced for our transgressions, he was crushed for our iniquities;
the punishment that brought us peace was upon him, and by his wounds we are
healed. We all, like sheep, have gone astray, each of us has turned to his
own way; and the LORD has laid on him the iniquity of us all." [Isaiah
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