Video

Chapter 10

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Video in MultimediaVisual motion helps to convey realism and movement

10Uses of Video in

MultimediaVideo enhances common applications of multimedia.

Video simulations show procedures and interactions that would be dangerous to perform in actuality

Games use video to simulate flight, car racing, and other action

Web sites and CD-ROMs use videos as reference material

Videoconferences enable participants to see each other and witness demonstrations

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Video QualityVideo quality depends on:

The resolution and clarity of individual video frames.

The frame rate or speed at which video frames appear. Frame rate is measured in frames per second (FPS).

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What is streaming video?Streaming video refers to a technique for transferring data so that the browser starts displaying the data before the entire file has been transmitted.

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Video File FormatA video file’s format determines:

Which programs can open and play it.

How much space it occupies on a disk.

How fast it travels over an Internet connection.

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Common File FormatsThe most commonly used video file formats are:

MOV (movie), also known as QuickTime

WMV (Windows media video)

AVI (audio video interleave)

MPEG compresses audio and video

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Video SoftwareThere are programs for playing video and audio, as well as editing and distributing video.

A number of video players are available on the Internet for free or at nominal cost.

Video editing software allows you to edit video.

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Video HardwareVideo hardware includes:

Camcorders, digital or analog, for recording live actionWebcams, to include live, streaming video in a Web siteCapture cards for converting analog video to digital formatVideo tuners to enable a PC to receive and save television signals