Digital Video MediaBy: David Owens

Introduction to Video

• Streams: Audio and Video

• Video Frames

• Compression

• Scale

• Time-code

Video Encoding

• Codec: Encode/Decode

• Lossless – No data lost or changed

• Lossey – Data lost during compression

Divx

• Readily available

• Proprietary

• Keyframing

• Lossey

Xvid

• MPEG-4 ISO compliant

• Open Source

• Keyframing

• Lossey

HuffYUV

• Lossless

• Encoding speed

• Size

Video Editing

• Timeline(s)

• Audio/Video interaction

• Codec Support

• Ease of use (UI)

Windows Movie Maker

• Movie files are added to collections and divided into clips

• Lacks multi-timelines

• Limited ability to change clips

• Simple audio adjusting

• Limited exporting choices

• Relatively simple for beginners

VirtualDub

• Single Timeline

• Large support for codecs

• Fairly easy to use, simple design

• More editing choices

• More choices of audio

• Many exporting options

Adobe Premiere

• Multiple Timelines

• Multiple Audio Sources

• Many editing choices

• Large support for codecs

• Easy to use

• Expensive

Jahshaka

• Open Source

• No comment…

Video Media Ethics

• Companies protecting their copyrighted works

• Individual violating copyrights

Sony CD DRM

• Uses Autorun feature of windows to install anti-music copying software without user’s consent.

• Easily countered

• Compromises to system security

• MediaMax, XCP systems

Samsung DRM Glitch

• US Film Makers Sue Samsung Over Glitches on DVD Players

• Glitch allows players to bypass DRM mechanisms

• “Sophisticated users”

Fair Use

• Section 107 of copyright law• Reproduction of work considered “fair” for

criticism, comment, news reporting, teaching, scholarship, and research.

• Factors considered: character of use, nature of copyrighted work, amount of the portion used, effect of the use upon the potential market

• Protects the way the original author expressed the information, not the information itself

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Sources Used:• www.divx.com• www.xvid.org• www.virtualdub.org• http://neuron2.net/www.math.berkeley.edu/benrg

/huffyuv.html• www.chiariglione.org/• http://times.hankooki.com/• Center for Information Technology Policy

Department of Computer Science Princeton University

• http://www.copyright.gov