Techniques for Creating Techniques for Creating Accessible, Closed Accessible, Closed

Captioned Web-Based Captioned Web-Based VideoVideo

California State University - NorthridgeCalifornia State University - Northridge22nd Annual International Technology and 22nd Annual International Technology and

Persons with Disabilities ConferencePersons with Disabilities Conference

Los Angeles, CaliforniaLos Angeles, CaliforniaMarch 22, 2007March 22, 2007

http://disability.law.uiowa.edu/lhpdc/publications/kleinpubs.htmlhttp://disability.law.uiowa.edu/lhpdc/publications/kleinpubs.html

David Klein David Klein K. “Fritz” ThompsonK. “Fritz” Thompson

InteractiveInteractive

Who are you?Who are you? Why are you here?Why are you here? What would you like to know?What would you like to know? What are your expectations from this What are your expectations from this

workshop?workshop?

OverviewOverview

Introduction to accessible web-based videoIntroduction to accessible web-based video Creating captions with MAGpie (activity)Creating captions with MAGpie (activity) QuickTime (activity)QuickTime (activity) (Break?)(Break?) Windows Media Player (activity)Windows Media Player (activity) Using a Flash player (activity)Using a Flash player (activity) Embedding content in a web page Embedding content in a web page Process and CompressionProcess and Compression

IntroductionIntroduction Law, Health Policy & Disability CenterLaw, Health Policy & Disability Center

Grant-funded research, technical support, & trainingGrant-funded research, technical support, & training

Our NeedsOur Needs

Accessible web-based trainingAccessible web-based training Quality videoQuality video Closed captionsClosed captions TranscriptsTranscripts Supporting documents (PowerPoints, Handouts)Supporting documents (PowerPoints, Handouts)

Different formats Different formats QuickTimeQuickTime Windows Media PlayerWindows Media Player Flash)Flash)

Efficient production, development, and deploymentEfficient production, development, and deployment

Our VideoOur Video

http://disability.law.uiowa.edu/dpn/video/http://disability.law.uiowa.edu/dpn/video/ Over 100 hours of online video for trainingOver 100 hours of online video for training Mostly talking headsMostly talking heads

CharacteristicsCharacteristics

User choiceUser choice Start with most accessible player – Flash Start with most accessible player – Flash Multiple players and configurationsMultiple players and configurations

Embedded vs. Standalone playersEmbedded vs. Standalone players Automatic play vs. press a key to startAutomatic play vs. press a key to start Resizable PlayersResizable Players Uncaptioned versionsUncaptioned versions Platform agnostic (Windows, OS X, Linux)Platform agnostic (Windows, OS X, Linux)

Available metadata, transcript, supporting Available metadata, transcript, supporting documentsdocuments

Overview of the Overview of the TechnologiesTechnologies

PlayersPlayers

QuickTimeQuickTime Windows Media PlayerWindows Media Player Real PlayerReal Player Flash Player(s)Flash Player(s) OthersOthers

The TechnologiesThe Technologies

Clients and serversClients and servers Plugins or whateverPlugins or whatever DownloadingDownloading Embedding video in web pagesEmbedding video in web pages FlashFlash

Clients vs. ServersClients vs. Servers

Clients Clients

Server

Clients vs. ServersClients vs. Servers

Server

Clients Clients

Servers

ServerServer

Server Server Stores HTML, video, caption text, other filesStores HTML, video, caption text, other files Files can be stored on different serversFiles can be stored on different servers

FilesFiles HTML pageHTML page Video fileVideo file Caption text fileCaption text file Combining fileCombining file Supporting files (transcript, handouts, PowerPoint)Supporting files (transcript, handouts, PowerPoint)

Client Client

Displays HTML in browserDisplays HTML in browser Launches playersLaunches players Assembles and displays the pieces Assembles and displays the pieces

VideoVideo Caption text Caption text Video player and its controlsVideo player and its controls HTML and surrounding contentHTML and surrounding content

Client ViewClient View

Browser Window

Embedded Player with Controls

Video

Captions

Links to supporting documents

Embedded Captioned Embedded Captioned VideoVideo

Embed in HTML File

Server ClientVideo File

Caption File

Combine Files in Player

Captioning TechnologiesCaptioning Technologies Open formatsOpen formats

XML XML Extensible Markup LanguageExtensible Markup Language

SMILSMIL Synchronized Multimedia Integration LanguageSynchronized Multimedia Integration Language

DFXPDFXP Distribution Format Exchange Profile of the timed-text authoring Distribution Format Exchange Profile of the timed-text authoring

format (TT AF)format (TT AF) Proprietary formatsProprietary formats

QuickTime caption fileQuickTime caption file Apple proprietary formatApple proprietary format

SAMISAMI Microsoft® Synchronized Accessible Media Interchange Microsoft® Synchronized Accessible Media Interchange

Download and PlayDownload and Play

Wait for file to download before playingWait for file to download before playing Can be a long timeCan be a long time Freezes possible but can play back without Freezes possible but can play back without

freezesfreezes Download and store for later playDownload and store for later play No copy protectionNo copy protection Archive onlyArchive only

StreamingStreaming Short wait for start of videoShort wait for start of video High bandwidth requiredHigh bandwidth required

Fast server or multiple serversFast server or multiple servers Special network settings may be needed (multiple Special network settings may be needed (multiple

connections)connections) Fast connectionsFast connections

Freezes not uncommonFreezes not uncommon Problems at client end (firewalls)Problems at client end (firewalls) Can copy protectCan copy protect Required for live videoRequired for live video Possible for archived videoPossible for archived video

““Progressive download”Progressive download”

Short wait for start of video, depending on Short wait for start of video, depending on bandwidthbandwidth

Slow connection possibleSlow connection possible Freezes possible but can be replayed without Freezes possible but can be replayed without

freezesfreezes Download and store for later playDownload and store for later play Copy resistanceCopy resistance Archive onlyArchive only

Open CaptioningOpen Captioning

SimplerSimpler Smaller file sizeSmaller file size Embedded (burned in)Embedded (burned in) StaticStatic May be hard to readMay be hard to read Doesn’t compress wellDoesn’t compress well

Closed CaptioningClosed Captioning

Captions can be Captions can be closedclosed

Benefit for people Benefit for people who would be who would be distracted by captionsdistracted by captions

Not much other Not much other difference on the Webdifference on the Web