Apple QuickTime Informações Técnicas descarregar pdf (Página 58)

58 Chapter 6 Setup Example

Such a setup would make it possible for students who couldn’t attend a class in person

to view it online. It would also enable students to review parts of the lecture later by

playing an archived version on their computers.

The streaming setup in this example, shown above, has these features:

• An already-existing local network with Ethernet connections to classrooms and

lecture halls from which live presentations are to be streamed.

• A digital video (DV) camera and microphone set up in a classroom or lecture hall to

convert the live presentation to digital form. The camera makes a high-quality DV

recording of the presentation and provides the digital signal to be encoded for live

streaming.

• The DV camera is connected through a FireWire port to a laptop computer running

QuickTime Broadcaster, which encodes the digitized live presentation and transmits

the signal via an Ethernet connection to the streaming server on the campus

network.

• The streaming server is a rack-mounted Xserve running “headless” (without a

monitor and keyboard). The server is running Mac OS X Server with QuickTime

Streaming Server (QTSS) configured to reflect the encoded live presentation as a

unicast stream to each client computer—on the campus network or on the

Internet—that “tunes in” to the broadcast. The Xserve comes with Mac OS X Server

and QTSS preinstalled.

Streaming

server

Broadcaster

The Internet

Clients on Internet

Clients on

local networ

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Apple QuickTime Informações Técnicas Página 58