On Thu, 08 Oct 2009 14:53:59 +0200, Gervase Markham <[email protected]> wrote:
On 08/10/09 13:29, Simon Pieters wrote:
Maybe we could remove the networkState check when the src attribute is
set or changed. Should the "in a Document" check be removed, too? That
is, do you want to be able to do
var a = new Audio('foo');
a.play();
a.onended = function() { a.src = 'bar'; a.onended = null; }
That seems like the obvious way one would implement the chaining of
videos, isn't it? Although it doesn't allow for pre-loading and
therefore seamless linking unless you've loaded 'bar' in another <audio>
somewhere else previously. Hmm...
I think I want to be able to do:
var a = new Audio('foo');
a.play();
a.src = 'bar';
a.load();
a.onended = function() { a.play(); a.onended = null; }
which gives me the preloading as well without needing an extra element.
So you want the media element to load two resources at the same time? I'm
very skeptical about this idea. What should happen when the user clicks
pause and then play, should it suddenly switch to the new media?
I don't see the problem with having separate media elements for separate
media:
var a1 = new Audio('foo');
var a2 = new Audio('bar');
a1.play();
a1.onended = function() { a2.play(); a1 = null; /* allow a1 to be garbage
collected */ }
For video, you can do the same thing and just use replaceChild():
<video src='foo' autoplay controls></video>
<script>
var v1 = document.querySelector('video');
var v2 = document.createElement('video');
v2.autobuffer = true;
v2.controls = true;
v2.src = 'bar';
v2.load();
v1.onended = function() { v1.parentNode.replaceChild(v1, v2); }
</script>
What do you think should happen when using <source> elements?
Good question. I think that if I add a <source> element, it should be
automatically load()ed. But if I call play(), then the resource
selection algorithm should be used at that point to tell which video
actually plays.
Not sure I follow. Currently, inserting a <source> into a media element
that is in a document and has networkState NETWORK_EMPTY will run the
resource selection algorithm. Inserting another <source> will only be used
if the first <source> fails.
--
Simon Pieters
Opera Software
