Apple QuickTime Streaming Server Darwin Streaming Server Bedienungsanleitung PDF herunterladen (Seite 6)

Viewing Streamed Media: How It Works

Darwin Streaming Server streams can be viewed by both Macintosh and Windows users using

QuickTime Player (which is available for free on Apple’s Web site) or any other application

that supports QuickTime. Streams can also be set up so that users can view them from within

a Web browser when the QuickTime Plugin is installed.

When a user starts to play streamed media through a Web page

, the QuickTime Plugin

sends a request to the server.

When a user uses QuickTime Player to view multimedia on demand

, the client computer

sends a request for the server to play the multimedia ﬁle. The server looks for the hinted

movie ﬁle, and if it’s found, sends the media to the client computer.

When a user tunes in to a live broadcast

, the Darwin streaming client (for example,

QuickTime Player) sends a request to the Darwin Streaming Server. The server looks for a

Session Description Protocol (SDP) ﬁle, and if it’s found, begins to send the media to the

client computer. An SDP ﬁle contains information about the format, timing, and authorship

of the live broadcast. SDP ﬁles are created by broadcast software on the computer that

captures the live media, but the SDP ﬁle must be copied to the streaming server before the

media can be broadcast.

When a user tunes in to a prerecorded broadcast

, a similar process happens: the server

looks for an SDP ﬁle. In this case, an SDP ﬁle is created automatically when you start

broadcasting playlists. If the SDP ﬁle isn’t created on the streaming server, it must be copied

to the streaming server before the prerecorded media can be broadcast.

Who Should Use Darwin Streaming Server?

Anyone interested in delivering either audio or video over the Internet in real time should

use Darwin Streaming Server. For example, you can use QuickTime Streaming to:

create a 24-hour-a-day Internet radio station

broadcast live events such as concerts, company meetings, and school assemblies

create a distance learning Web site, with video of lectures available on demand

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Apple QuickTime Streaming Server Darwin Streaming Server Bedienungsanleitung Seite 6