[Webkit-unassigned] [Bug 123907] HTMLMediaElement support for timed metadata

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=123907





--- Comment #5 from will at johnstonclan.net  2014-04-07 09:17:52 PST ---
I don't know how the code review process works, and I am loath to spam systems when not desired. So I'll attach a comment here describing a use case:

I work for a large public radio station, and we have quite a few live streams across our services. These streams contain in stream metadata which changes when the piece or show being played changes. With the fixes in these tickets, we can refresh the player display on change, rather than polling every 15 seconds or so across thousands of users.

A nice bonus with this is that we get high levels of accuracy for when a song/show changes and so can start to make the player UI handle much more granular changes, down to a few seconds.

On the other end, in the case of a classical symphony for example, you could have a piece which plays for an hour and then is followed by a series of 15 second promos. Right now, every player has to poll every 10 seconds for an hour to have any degree of accuracy for the following promos. Assuming 0.5k per poll and 300 concurrent listeners, we have about 50MB in wasted requests and the overhead of 108,000 unneeded http requests.

For this reason, we default our player to flash over html5. We want to prefer html5 and use Flash as a fallback, but this is a blocker. We are looking at alternatives, but they are inconsistent and brittle.

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