Re: comments on draft-barth-mime-sniffing

At 16:32  +1200 18/06/09, Robert O'Callahan wrote:
>On Wed, Jun 17, 2009 at 7:15 PM, Maciej Stachowiak 
><<mailto:mjs@apple.com>mjs@apple.com> wrote:
>
>On Jun 16, 2009, at 11:12 PM, Adam Barth wrote:
>
>I think roc was specifically referring to content for the <video> tag.
>Because no such content currently exists, the legacy compatibility
>requirements are much less onerous than, say, for HTML.
>
>
>I think Dave's point was that if you support codecs and containers 
>in <video> that are currently supported by widely used plugins, then 
>you are more likely to face these legacy issues with broken MIME 
>types when deploying <video>. Content authors might well expect that 
>already published MP4 files which work in the QuickTime plugin or a 
>Flash-based player, should continue to work if embedded via <video>.
>
>
>They may expect that, but breaking that expectation is less of a 
>problem than breaking actual existing content.

sorry, you've lost me.  breaking that expectation does break existing 
content;  and I can't see how doing content sniffing breaks more 
content than not.  can you explain?
-- 
David Singer
Multimedia Standards, Apple Inc.