VIDEOChapter 10

The Role of Video in Multimedia

Any presentation or application that uses sound and graphics qualifies as multimedia

ClipA segment of video (or audio) recording

Real timeWhen a video signal is broadcast live an

unedited

Video Quality

FrameA single image in a video or animation

Frame rateThe speed at which video frames appear on

a display, measured in frames per second (FPS)

The higher the frame rate, the smoother and sharper the video display

Streaming Video

Streaming videoA technique for transferring data so that the

browser starts displaying the data before the entire file has been transmitted

First made popular in 1995 by RealNetworks

Video File Formats

Movie (MOV)Introduced by Apple in 1991Developed for QuickTime video playerAlso known as the Quicktime movie formatHigh-quality format that compressed video

significantly without losing too much quality

Video File Formats

Windows Media Video (WMV)Developed by Microsoft for its video player

softwareClosely related to WMA (which is only for

audio)Not played well by all systemsRecent versions include more security

measures○ Digital Rights Management (DRM)○ Prevents unauthorized duplication

Video File Formats

Audio Video Interleave (AVI)Introduced by Microsoft in the early 1990s for

WindowsNot a streaming video format, so if you are

playing it from a Web site, you need to download the entire file before viewing

Can be played by most video playersBecause of the structure of the format, a

player that supports some AVI cannot necessarily play all AVI files

Has a strong Internet presence

Video File Formats

MPEG (Moving Picture Experts Group)Compresses audio and videoCan be used with streamingGood for networksConstantly evolving

The “Future” of Video in Multimedia Full-screen streaming video ✔ High-quality video without massive file

sizes ✔ Higher resolution and frame rates in

video from digital cameras ✔ High-definition television (HDTV) on the

Internet ✔ Operating systems that include video

conferencing software ✔

Video Player Software

RealNetworks’ RealOne (now called RealPlayer)

Apple’s QuickTime Microsoft’s Windows Media Player Adobe Flash Player*

Video Editing Software

Window’s Movie Maker Apple’s iMovie Apple’s Final Cut Pro Adobe Premier Batch processing

Allows you to generate low-resolution thumbnails of each frame, which remain linked to each corresponding high-resolution frame, which speeds up the offline video editing process

Video Devices

Video cameras Video Capture Cards

Convert analog video (such as films from a VCR) to digital format

Video TunersA circuit board that enables it to receive

television signals