Putting Video on the Web - A Practical Guide to Video and Audio Compression - page 418

Table 26-2 Metafile File Name Extensions

Extension File type

Windows Media Advanced Stream Redirector metafile

.asx

MPEG media queue file

.m3u

QuickTime reference movie

.mov

RealAudio Redirector Metafile

.ram

RealMedia Redirector Metafile

.rmm

Real Plug-in Redirector Metafile

.rpm

SMIL

.smi

SMIL

.smil

Windows Media audio redirector

.wax

Windows Media redirector

.wmx

Windows Media playlist

.wpl

Windows Media video redirector

.wvx

26.8 Windows Media Metafiles

Advanced Stream Redirector ( .asx ) metafiles provide information about a file stream and
its presentation. The .asx files also define playlists and provide Windows Media Player
with instructions for presenting media items in the playlist.
Windows Media metafiles are implemented with an XML-based syntax and can be
encoded in either ANSI or UNICODE (UTF-8) format.
The listing below shows the contents of an .asx file as used by Windows Media
players.

<asx version=”3.0”>
<entry>
<ref href=”mms://stream.contactright.com/media/clip.wmv”/>
<starttime value=”00:00:00”/>
<abstract>Descripting abstract text</abstract>
<title>Title text</title>
<author>Content author</author>
<copyright>Copyright 2004 ContactRight Ltd</copyright>
</entry>
</asx>