Techniques for Creating Accessible, Closed Captioned Web-Based Video
California State University - Northridge
21st Annual International Technology and 
Persons with Disabilities Conference

Los Angeles, California
March 22, 2007

http://disability.law.uiowa.edu/lhpdc/publications/kleinpubs.html
Media Player Closed 
Captioning Options
•	SAMI file with carefully selected file name
•	File name must match the video name
•	Video.wmv
•	Video.smi
•	Mostly works
•	Captions must be turned on in Media Player
•	Address to video that includes SAMI address
•	http://www.mydomain.com/video.wmv?sami=http://www.mydomain.com/captions.smi
•	SAMI file and .asx file
•	SAMI file contains caption text and parameters
•	.asx file combines video and SAMI file (like SMIL file)
Media Player Captioning & Deployment 
•	Video
•	.wmv 
•	Caption file
•	.smi (SAMI)
•	Integration file
•	.asx 
•	Integrates video and caption files
•	HTML
ASX File Characteristics
•	Use XML standards (mostly)
•	Tags NOT case sensitive
•	All elements closed
•	<tag>xxx</tag> (open and close tags)
•	<tag /> (no explicit close tag; use the slash)
ASX File Structure

<ASX Version="3.0" PreviewMode="No" >
<!-- Put playlist metadata here -->
	<entry>
		<!--Put clip metadata here. -->
		<Title> </Title>
		<copyright> </copyright>
		
		<!--Here's the video and captioning info -->
		<Ref HREF="http://www.yourdomain.edu/video.wmv?
		sami=http:// yourdomain.edu/video..smi" />
	</entry>
</ASX>
ASX File
•	ASX version number (PreviewMode)
•	Metadata for overall content or playlist
•	Event or playlist title
•	Authors/editors
•	Copyright information)
•	Entry content
•	More metadata for clip (video title, copyright)
•	File locations (complex URL)
•	video.wmv?sami=captions.smi
Create ASX File Activity
•	Handout: Windows Media Player SAMI/ASX Activity - Assemble Files

•	Objective: Modify the SAMI file created with MAGpie and assemble files to create a captioned, Windows Media Player video.