[whatwg] <video> feedback

[Ian Hickson]

On Thu, 20 Dec 2012, Mark Callow wrote:
> 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 
> <http://randomascii.wordpress.com/2012/02/13/dont-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.

Everything in the Web platform already uses doubles.

-- 
Ian Hickson               U+1047E                )\._.,--....,'``.    fL
http://ln.hixie.ch/       U+263A                /,   _.. \   _\  ;`._ ,.
Things that are impossible just take longer.   `._.-(,_..'--(,_..'`-.;.'