RE: SMIL (was Re: TO DO'S FOR 1.2.1)

What are static captions? 


 
Gregg

 -- ------------------------------ 
Gregg C Vanderheiden Ph.D. 
Professor - Ind. Engr. & BioMed Engr.
Director - Trace R & D Center 
University of Wisconsin-Madison 


-----Original Message-----
From: public-wcag-teama-request@w3.org
[mailto:public-wcag-teama-request@w3.org] On Behalf Of Christophe Strobbe
Sent: Tuesday, January 10, 2006 12:57 PM
To: public-wcag-teama@w3.org
Subject: SMIL (was Re: TO DO'S FOR 1.2.1)



At 18:18 9/01/2006, Ben Caldwell wrote:
<blockquote>
(...)
1.2.3: I've added the SMIL techniques for 1.2.1 to 1.2.3 in the wiki per
Gregg's request. However, I'm not sure that the techniques would be the same
for static vs. real-time captions in SMIL? Any SMIL experts on Team A that
can help?
(...)
</blockquote>

In the absence of SMIL experts, I consulted "SMIL: Adding Multimedia to the
Web" by Tim Kennedy and Mary Slowinski (SAMS, 2002; see also
http://www.smilbook.com/).
For a prerecorded video, you do "pseudostreaming" or "progressive download" 
over HTTP and TCP, while live video requires true streaming with a streaming
server and a streaming protocol over UDP (instead of TCP). The book has
nothing to say about how you work with resources from a streaming server.
However, there is a SMIL example at http://open4all.info/ossa/_SMIL. In the
SMIL file, you need a correct link to the stream on the server, which, in
this example, talks RTSP.
There's also some information at
http://service.real.com/help/library/guides/production8/htmfiles/live.htm.
As far as I can tell, the real challenge is creating those streams and
getting the captions synchronized.

Regards,

Christophe


-- 
Christophe Strobbe
K.U.Leuven - Departement of Electrical Engineering - Research Group on 
Document Architectures
Kasteelpark Arenberg 10 - 3001 Leuven-Heverlee - BELGIUM
tel: +32 16 32 85 51
http://www.docarch.be/ 


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Received on Tuesday, 10 January 2006 19:46:08 UTC