Media Components
A SMIL presentation consists of a set of component files. The SMIL
file is the "container" for all of these files, just as
an HTML file contains the references to all of its component parts
(for example, images, other Web pages, and so forth).
The following chart lists the various types of clips you might
include. It also lists typical dimensions (where appropriate) and
bandwidths for these types of media, which will be useful when you
start to work on the presentation layout and timing:
| Type |
Description |
Dimensions |
Bandwidth |
| animation |
Animation clips such as a Flash Player file (.swf).
|
varies |
|
| audio |
Audio clips such as RealAudio (.rm) or MP3 (.mp3) |
n/a |
34kbps - 64kbps |
| img |
JPEG (.jpg), GIF (.gif), or PNG images (.png)
Can be served from Web server or Real server. |
banners are typically 580 - 600 pixels wide
(standard Web page width)
|
12kbps |
| text |
Static text clips (.txt). Must be served from
Web server. |
varies |
less than 1kbps |
| video |
Video or other clips that display continuous motion,
such as RealVideo (.rm). |
160 x 120
240 x 180
320 x 240 |
150kbps - 256kbps |
Practice
The items below are the media we will be using as we build a sample
presentation.
| 
