[whatwg] Remove addCueRange/removeCueRanges

Philip Jägenstedt philipj at opera.com
Fri Aug 14 03:55:10 PDT 2009

On Fri, 14 Aug 2009 10:28:14 +0200, Dr. Markus Walther <walther at svox.com>  

> Hi,
>> The .start/.end properties were dropped in favor of media fragments,
>> which the Media Fragments Working Group is producing a spec for.
> Who decided this? Has this decision been made public on this list?

It happened in November 2008:


This is the specific spec change:


>> It will
>> be something like http://www.example.com/movie.mov#t=12.33,21.16
> var audioObject = new Audio();
> audioObject.src
> ='data:audio/x-wav;base64,UklGRiIAAABXQVZFZm10IBAAAAABAAEAIlYAAESsAAACABAAZGF0Yf7///8AAAAA....';
> // play entire audio
> audioObject.play();
> // play (0.54328,0.72636) media fragment
> ?????
>> See http://www.w3.org/2008/01/media-fragments-wg.html and
>> http://www.w3.org/2008/WebVideo/Fragments/wiki/Syntax#Examples
> Did you look at these yourself? I couldn't find something that
> approaches a spec of comparable quality to WHATWG in these pages.

Implementation (should) always comes before spec and there is no  
implementation yet. Given the simplicity of the most basic syntax, I am  
not at all worried by the lack of a proper spec yet.

> Is there any provision for the dynamic case, where you want to change
> the media fragment after it has been loaded, with zero server
> interaction, and working for data URIs as well?

You can change the fragment with scripts at any time you want followed by  
load()/play(). data URI's with fragments are perfectly valid as far as I  
can see. The rest is up to proper implementation (caching).

>>> Actually, out of curiousity: could gapless concatenation of several
>>> audio objects be added as well, e.g.
>>> audioObject1.append(audioObject2)
>>> or even
>>> audioObject.join([audioObject1,audioObject2,...,audioObjectN)
>> There has been much discussion about audio "canvas" API:s and I trust
>> this could fit into that scope.
> As the 'inventor' of the term, I am of course familiar with the
> discussion - here I was merely adding an item to the wishlist.
>> View source at
>> http://www.whatwg.org/specs/web-apps/current-work/multipage/video.html#video
>> and search for "v2" and you'll find some of these ideas.
> Could these be lifted from hidden HTML comments to something with better
> visibility somehow?

I agree that would be nice, perhaps on http://wiki.whatwg.org/ ?

Philip Jägenstedt
Opera Software

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