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Guidelines for Presenting Guidelines for Presenting Archived Video on the Archived Video on the
Web: An OverviewWeb: An Overview
AECT Annual ConventionAECT Annual Convention
Dallas, TXDallas, TXOctober 12, 2006October 12, 2006
David Klein David Klein K. “Fritz” ThompsonK. “Fritz” Thompson
OverviewOverview
IntroductionIntroduction
Technology of web-based videoTechnology of web-based video
Video playersVideo players
AnalysisAnalysis
FutureFuture
About UsAbout Us
Law, Health Policy & Disability Law, Health Policy & Disability CenterCenter http://disability.law.uiowa.eduhttp://disability.law.uiowa.edu
Standup trainingStandup training
Accessible video of talking headsAccessible video of talking heads
Almost 100 hours online videoAlmost 100 hours online video
75 hours of online audio 75 hours of online audio
About UsAbout Us
PlayersPlayers QuickTimeQuickTime Windows Media PlayerWindows Media Player FlashFlash
Closed captionedClosed captioned Supporting documents Supporting documents
TranscriptsTranscripts HandoutsHandouts PowerPointsPowerPoints
Accessible for people with disabilitiesAccessible for people with disabilities
Archived VideoArchived Video
Any stored video, available on Any stored video, available on demand via the Webdemand via the Web
Clients vs. ServersClients vs. Servers
Server
Clients Clients
Clients vs. ServersClients vs. Servers Server Server
Stores HTML, video, caption text, other filesStores HTML, video, caption text, other files Files stored on different serversFiles stored on different servers
ClientClient Displays HTML in browserDisplays HTML in browser Launches playersLaunches players Assembles/packages the pieces Assembles/packages the pieces
VideoVideo Caption Caption Video PlayerVideo Player HTMLHTML
Client ViewClient View
Browser Window
Embedded Player
Video
Captions
Supporting Information
Embedded Captioned Embedded Captioned VideoVideo
HTML File
Server Client
Video File
Caption File
Combining File
External VideoExternal Video
User clicks link
Standalone Player Client
standalone player is launched
Web-based Video Web-based Video DeliveryDelivery
StreamingStreaming
DownloadDownload
Progressive downloadProgressive download
StreamingStreaming
Continuous, active client-server connectionContinuous, active client-server connection
BenefitsBenefits Live broadcastsLive broadcasts Low client hard drive space usageLow client hard drive space usage Protection of intellectual property (IP)Protection of intellectual property (IP)
DisadvantagesDisadvantages High bandwidthHigh bandwidth Network expertiseNetwork expertise TroubleshootingTroubleshooting May require client network setup (firewalls)May require client network setup (firewalls)
DownloadDownload
Movie downloaded to client drive & THEN playedMovie downloaded to client drive & THEN played
BenefitsBenefits Minimizes bandwidthMinimizes bandwidth Multiple views from same downloadMultiple views from same download Distribute to othersDistribute to others
DisadvantagesDisadvantages Must use standalone playerMust use standalone player UsabilityUsability Requires hard drive spaceRequires hard drive space Disconnected from supporting information (copyright)Disconnected from supporting information (copyright) Distribute to othersDistribute to others
Progressive DownloadProgressive Download
Play video WHILE downloadingPlay video WHILE downloading BenefitsBenefits
Maximizes experience – bandwidth vs. wait Maximizes experience – bandwidth vs. wait timetime
Can be saved and redistributedCan be saved and redistributed Range of IP protection controlRange of IP protection control Easiest for usersEasiest for users
DisadvantagesDisadvantages Uses hard drive space (but temporarily)Uses hard drive space (but temporarily) Starts and stopsStarts and stops Once downloaded, can be disconnected from Once downloaded, can be disconnected from
supporting informationsupporting information
CompressionCompression
See differences in compression See differences in compression codecs and settingscodecs and settings
Click.
Decision MatricesDecision Matrices
Learning Context Analysis (Source)Learning Context Analysis (Source)
Learning Context Analysis (Learner)Learning Context Analysis (Learner)
Learner AnalysisLearner Analysis
Learning Context Learning Context (Source)(Source)
Production Quality – outlined Production Quality – outlined techniques that improve quality for techniques that improve quality for web-based videoweb-based video Emphasize audio (usually)Emphasize audio (usually)
Audio without video is radioAudio without video is radio
Video without audio is junkVideo without audio is junk
Product Quality – range of quality that Product Quality – range of quality that would be likely in these environmentswould be likely in these environments
Learning Context (End Learning Context (End Product)Product)
Streamed video Streamed video Biggest difference – knowledge and Biggest difference – knowledge and
experience needed for productionexperience needed for production Cost a factorCost a factor
Progressive DownloadProgressive Download Not much differenceNot much difference
Learner AnalysisLearner Analysis
CostCost
Cognitive load: actions required by Cognitive load: actions required by learner learner E.g., download and install pluginE.g., download and install plugin Consistency and usability of menusConsistency and usability of menus
Marketing by player manufacturersMarketing by player manufacturers
Flexibility and scripting supportFlexibility and scripting support
OS and browser supportOS and browser support
FutureFuture
iPods and personal media playersiPods and personal media players
Inexpensive hostingInexpensive hosting YouTubeYouTube GoogleGoogle Yahoo!Yahoo!
Podcasting (vodcasting?)Podcasting (vodcasting?)
Video on demand (commercial)Video on demand (commercial)
HDHD
ContactContact Law, Health Policy & Disability CenterLaw, Health Policy & Disability Center
http://disability.law.uiowa.edu/http://disability.law.uiowa.edu/
This presentationThis presentation http://disability.law.uiowa.edu/lhpdc/publications/http://disability.law.uiowa.edu/lhpdc/publications/
kleinpubs.htmlkleinpubs.html
LHPDC Bulletin BoardLHPDC Bulletin Board http://disability2.law.uiowa.edu/bbs http://disability2.law.uiowa.edu/bbs
David Klein280-1 Boyd Law Bldg.College of LawUniversity of IowaIowa City, IA 52242319-335-6748david-klein@uiowa.edu
K. “Fritz” Thompson280-1 Boyd Law Bldg.College of LawUniversity of IowaIowa City, IA 52242319-335-6748kenneth-d-thompson@uiowa.edu
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