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[Bug 12556] <video> Define how currentTime is updated in terms of tasks

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Date: Tue, 26 Apr 2011 09:11:03 +0000
To: public-html-bugzilla@w3.org
Message-Id: <E1QEeIR-00043e-BL@jessica.w3.org>

--- Comment #2 from Philip Jägenstedt <philipj@opera.com> 2011-04-26 09:11:03 UTC ---
One rather serious complication is that scripts that paint to a canvas would
expect that the frame they get is at the currentTime they are seeing. Currently
this is simply racy, it's possible to paint a frame just before it ends and
then observe the currentTime of the next frame. However, to *guarantee* that
scripts always see the frame corresponding to currentTime, one would have to
buffer frames from the script-seen currentTime to the actual time. This isn't
really reasonable.

Leaving canvas painting racy is no worse than what we already have today,
perhaps this could somehow be framed as a QoI issue, as the buffering needed
isn't always feasible.

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Received on Tuesday, 26 April 2011 09:11:05 UTC

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