Chapter 7Chapter 7

VideoVideo

MELJUN CORTESMELJUN CORTES

Chapter Objectives Explain the difference between analog and digital

video List several uses of video on the Web Describe the roles and responsibilities of video

specialists Explain the factors that determine video quality Identify several sources of digital video

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Chapter Objectives Describe the pre-production, production, and post-

production processes Explain the difference between destructive and non-

destructive video processing List and describe several key video editing

programs List and describe several of the more common video

file formats Define compression and describe some of the most

commonly used video codecs

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IntroductionPower to communicate with motion and soundVideo editing technology is now affordable to the masses

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Types of VideoAnalog

Still usedWide abundance of equipment

Tape Videodiscs/Laserdiscs – CAV v. CLV

Video-capture cards Convert analog signal to digital signal Connect camcorder, VCR, TV, live feed Different CODECs

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Analog FormatsVHSS-VHS

Hi-8 Betacam SP LiveFeed

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Digital VideoDVDigital Video CameraFireWire – IEEE 1394

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Digital FormatsD1, D2, D3DVLiveFeed

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Uses of VideoOnline Training and EducationAdvertising and E-commerceEntertainment and Games

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Video SpecialistsVideographerVideo Editor

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Video QualityFrame Rate

Source frame ratePlayback frame rate

ResolutionAspect ratioFrame sizeBit depth

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Video StandardsNTSCPALSECAMHDTV

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Digital Video SourcesStock video footageClip videoRecord your own

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Producing VideoPre-production

StoryboardsScriptsFlowcharts

ProductionCapture

Post-productionEdit, Composite, Process

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Standard TimecodeSMPTE

Measures video in hours, minutes, second, framesUsed to synchronize video components

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DeliveryDownloadedStreamed

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Digital Video SoftwareAdobeAppleAvid

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Premiere – Non-linear editingCross-platformOpen architectureSupports a variety of formatsNondestructive editing

After Effects – CompositingUnlimited layers of moving and still imagesMotion packs, mattes, special effects

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AppleQuickTime Pro

Time-basedCross-platformSupports variety of formats and CODECsVariety of visual effects

iMovieTrim, synchronize, and reorder clips

Final CutEditing and compositing in one package

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AvidXpress

Cross platformEditing and compositing

Media ComposerHigh-end standard for Web, TV, Film

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Digital Video File FormatsAVI (Audio-Video Interleave)MPEGMOV (QuickTime)Real (RM)

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CompressionVideo files are huge

One second can require up to 30 MB of storage

Data transfer rate (dtr)

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CODECsAnimationCinepakIndeoSorenson

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