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Re: ISSUE-2: What is the mime type of a media fragment? What is its relation with its parent resource?

From: RaphaŽl Troncy <Raphael.Troncy@cwi.nl>
Date: Tue, 27 Jan 2009 15:21:01 +0100
Message-ID: <497F184D.1050402@cwi.nl>
To: David Singer <singer@apple.com>
CC: Media Fragment <public-media-fragment@w3.org>

Dear Dave,

> I think this is a confused question.  When a fragment is specified on a 
> URI,
> http:/www.example.com/silvia.mov#chapter=vienna
> the user-agent separates the fragment from the URI and requests the main 
> part of the resource over HTTP, and then interprets the fragment 
> locally.  The HTTP server, which gives the MIME type, is unaware of the 
> fragment.

True, the UA will separate the fragment from the URI. We think of having 
smart UA that will also take the fragment, and converts it into some 
additional http headers when making the request to the server. The http 
server will therefore in this case be aware of the fragment requested, 
and even can decide to serve just this fragment ... When serving the 
resource, the server writes in the http header the type of the resource 
is serving. What should it write when it is serving a single key-frame 
of a video corresponding to a media fragment request where a single time 
point has been specified?

> Even if it gets the fragment in the URI GET, it is (I think) 
> supposed to ignore it.  So the MIME type of a fragmented resource is the 
> MIME type of the resource, isn't it?

This is what I would think too. But I would like to get the 
confirmation, since it is not crystal clear (for me).
Best regards.


RaphaŽl Troncy
CWI (Centre for Mathematics and Computer Science),
Science Park 123, 1098 XG Amsterdam, The Netherlands
e-mail: raphael.troncy@cwi.nl & raphael.troncy@gmail.com
Tel: +31 (0)20 - 592 4093
Fax: +31 (0)20 - 592 4312
Web: http://www.cwi.nl/~troncy/
Received on Tuesday, 27 January 2009 14:21:51 UTC

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