[whatwg] [media] startOffsetTime, also add startTime?
ian at hixie.ch
Thu Apr 5 10:52:08 PDT 2012
On Thu, 5 Apr 2012, Philip Jägenstedt wrote:
> On Wed, 04 Apr 2012 20:56:03 +0200, Ian Hickson <ian at hixie.ch> wrote:
> > On Wed, 4 Apr 2012, Philip Jägenstedt wrote:
> > > > >
> > > > > In current Opera and Firefox the timeline is always normalized
> > > > > to start at 0, so the time that corresponds to 0 in the original
> > > > > timeline would be at a negative currentTime.
> > > >
> > > > I still don't really understand what you mean by "start" here.
> > >
> > > What I mean with "normalized to start at 0" is that when playing the
> > > whole resource
> > Now I don't understand what you mean by "whole resource". :-)
> > If a TV station starts broadcasting in October, and you join the
> > stream in February, the "whole resource" is many months long. Where's
> > your zero?
> > (I guess it's academic if you plan on changing; I'm just curious.)
> Oh, "whole resource" is a bit of a misnomer, I really mean "everything
> that we received". We don't make that distinction internally, since over
> HTTP there's no way to tell the difference between a streaming resource
> and a static resource served by a server that doesn't support byte
> ranges. The timeline is shifted by the timestamp of the first audio or
> video sample in the stream, such that currentTime is initially 0. The
> plan is to remove that adjustment.
Ah, I see. Thanks for clarifying.
Ian Hickson U+1047E )\._.,--....,'``. fL
http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,.
Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
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