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accessibility</title></head><body>
<div>At 14:40 +1300 11/12/08, Robert O'Callahan wrote:</div>
<blockquote type="cite" cite>On Wed, Dec 10, 2008 at 5:56 PM, Dave
Singer <<a href="mailto:singer@apple.com">singer@apple.com</a>>
wrote:<br>
<blockquote>At 21:33 +1300 9/12/08, Robert O'Callahan wrote:<br>
<blockquote>For what it's worth, loading an intermediate document of
some new type which references other streams to be loaded adds a lot
of complexity to the browser implementation. It creates new states
that the decoder can be in, and introduces new failure modes. It
creates new timing issues and possibly new security issues.<br>
</blockquote>
</blockquote>
<blockquote><br></blockquote>
<blockquote>I'm not sure I agree; but if you believe that, we
should address it no matter which way this discussion goes. It
should absolutely be possible to reference a SMIL file, or an MP4 or
MOV file with external data (to give only two examples) from a
<video> or <audio> element, and have the DOM, events,
states, and APis work correctly.<br>
</blockquote>
</blockquote>
<blockquote type="cite" cite><br>
I agree it should be done eventually, it's just significantly more
complicated than what we have to deal with currently.</blockquote>
<div><br></div>
<div>But if the state machine or other aspects are actually wrong for
this case, then we should fix it now. We have, for example,
tried to keep out these kinds of assumptions:</div>
<div>a) all media is downloaded (no, it might be streamed or even
arriving over non-IP, e.g. a TV broadcast)</div>
<div>b) all delivery methods are self-contained (no, they might
reference resources as well as contain them)</div>
<div>c) all delivery is sequential in play order (no, some file
formats decouple data timing and data ordering)</div>
<div><br></div>
<blockquote type="cite" cite>Rob<br>
--<br>
"He was pierced for our transgressions, he was crushed for our
iniquities; the punishment that brought us peace was upon him, and by
his wounds we are healed. We all, like sheep, have gone astray, each
of us has turned to his own way; and the LORD has laid on him the
iniquity of us all." [Isaiah 53:5-6]</blockquote>
<div><br></div>
<div><br></div>
<x-sigsep><pre>--
</pre></x-sigsep>
<div>David Singer<br>
Multimedia Standards, Apple Inc.</div>
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