[whatwg] <video> feedback

Mark Callow callow.mark at artspark.co.jp
Thu Dec 20 00:27:38 PST 2012

On 2012/12/18 9:01, Ian Hickson wrote:
> On Tue, 2 Oct 2012, Jer Noble wrote:
>> The nature of floating point math makes precise frame navigation 
>> difficult, if not impossible.  Rob's test is especially hairy, given 
>> that each frame has a timing bound of [startTime, endTime), and his test 
>> attempts to navigate directly to the startTime of a given frame, a value 
>> which gives approximately zero room for error.
>> ...
> That makes sense.
> Should we add a preciseSeek() method with two arguments that does a seek 
> using the given rational time?

I draw your attention to "Don't Store that in a float
and its suggestion to use a double starting at 2^32 to avoid the issue
around precision changing with magnitude as the time increases.



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