sura/vide 5th annual digital video workshop gcatt atlanta, georgia march 26, 2003 the vide guide to...
TRANSCRIPT
SURA/ViDe 5th Annual Digital Video Workshop
GCATT — Atlanta, GeorgiaMarch 26, 2003
The ViDe Guide toStreaming Media
Presentation Outline
• Cookbook Overview• Creating Digital Assets• Building an Infrastructure• Managing Digital Repositories• Authentication and Authorization• Accessibility Issues• Emerging Technologies
Streaming Media Working Group
• Established in April 2002• 38 Individual Members• Representing 18 Universities &
Consortia• Including 7 SURA Schools• And 2 International Members• 12 Member Editorial Board
Streaming Media Cookbook
Mission:To help educational institutions plan
and promote streaming media services on their campuses
Snapshot of Current Services
• Statistical Sample of US Universities
• Comprehensive Survey of I2 Schools
• Comparison with International Practice
Scope of the Cookbook
• Media-on-Demand and Live Streaming
• Audio, Video and Mixed Media• Proprietary and Standard Formats• Technical Issues and Policy Issues
Cookbook Format
• Tutorials• Best Practices• Case Studies• Evaluation Guidelines• Whitepapers• Reference Tools
Applications and Scenarios
• Electronic Reserves• Distance Education• Digital Libraries• Videoconference Archives• Public Relations and Special
Events
It Takes a Village:Identifying Strategic Partners
• Video Production Units• IT Infrastructure/Networking Services• Continuing Education• Libraries• Instructional Training• Legal Affairs• Public Relations• Help Desk
Planning for the Future
• Developing a Viable Business Plan• Integrating Disparate Roles and
Functions• Securing Institutional Commitment• Making Ends Meet• Taming the Wild Vendor• Anticipating the Unknowable
Creating Content: Pre-Production
• Validate Project Concepts• Make a Plan• Purchase Equipment and Hire
Personnel
Creating Content: Production
• Mid-Production Planning and Coordination
• Lighting• Audio• Video• Locations
– Office vs Classroom vs Studio• Wardrobe• Personnel
Creating Content: Post-Production
• Video/Audio Capture• External Capture
– Composite– USB– Firewire/iLink/IEEE1394
• Cabling• Editing
Creating Content:
Hardware/Software/Personnel
• Support/Assistance• Infrastructure• Encoding• CODEC• Application Default CODECs• Analysis/Understanding
Creating Content:
Hardware/Software/Personnel• Files Types
– Real– Quicktime– Microsoft Media Formats– MPEG1– MPEG2– MPEG4– MP3– Others
Creating Content: Support Issues
• VOD (Video on Demand– Hardware– Software– Personnel
• Live Webcasts– Hardware– Software– Personnel
Building the InfrastructureStreaming Servers
• Types of Streaming Servers– RTSP– HTTP– Others
Building the InfrastructureStreaming Servers
• Vendors– Real– Microsoft– Apple– IBM– Cisco– Macromedia– Others
Building the InfrastructureNetwork Infrastructure
• Bandwidth Requirements• Issues on the LAN
– Wireless– Ethernet Configurations
Building the InfrastructureNetwork Infrastructure
• Reaching Clients Outside your LAN– Firewalls– Modems– DSL/Cable Modems– VPNs– Proxies– Caching Servers– Content Distribution Networks (CDN)
Building the InfrastructureNetwork Infrastructure
• Multicast Issues• Streaming to Handhelds• Satellite Usage
– Content Origination (uplink)– Satellite Downlink
Building the InfrastructureStorage
• Direct Attached Storage (DAS)• Network Attached Storage (NAS)• Storage Area Networks (SAN)• Mixing Storage Architectures• Determing Needs & Product
Evaluation• Emerging Storage Technologies
Building the Infrastructure Origination of Live Content
• Where to Place Live Encoders• Network Issues• Monitoring• Automation/Scheduling• Remote Control
Building the Infrastructure Transcoding
• Issues– Quality of Source Material– Lossy vs. Lossless Compression– General Methods for Transcoding
• Products– FlipFactory– Cleaner– Anystream– ProCoder
• Automation
Managing Digital Repositories
• Leveraging Existing Systems• What is already in place?
– E-Reserves Systems– Course Management Systems– Authentication Systems– Digital Library/Content Mgmt
Systems– Local Metadata/Content Standard
Managing Digital Repositories
• Functional Requirements• Ingest Functions• Data Management/Metadata Mgmt• Archival Storage Procedures• Preservation Planning• Access Strategies – Deep or Shallow
Managing Digital Repositories
• ADMINISTRATION
• PRESERVATION PLANNING
Data & MetaData
Mgmt.
Archival Storage
Ingest Access
AIP
descriptive
info
descriptive
info
AIP
OAIS MODEL
CONSUMER
PRODUCER
Training
Discovery
Infrastructure
Training
Discovery
Infrastructure
Managing Digital Repositories
• Central vs Distributed• Why not Both?• Should your next system – be
separate or an aggregate?• Building relationships for the future• Face to Face meetings with video
counterparts• Workflow Issues – Who does What?
Authentication and Authorization
Security Basics
• Securing the Server• Securing the Network• Securing the Data on the Network• Authentication• Authorization
Authentication and Authorization
Streaming Video Security• Authentication
– User Name/Password– Credentials– Proprietary Solutions
• Authorization– User Name/Password– LDAP– Credentials– Proprietary Solutions– Digital Rights Management
Authentication and Authorization
Digital Rights Management (DRM)
• DRM Defined• DRM in Streaming Video
Authentication and Authorization
Shibboleth
Authenticate Locally, Access Globally
Accessibility IssuesSection 508 Requirements
• Requires that content dependent upon auditory or visual communication be accessible through alternative means
• http:www.section508.gov• Tools & Guidelines at:
http://www.w3.org/wai
Accessibility IssuesPragmatic Considerations
• Who is your audience, and what accessibility options are necessary to ensure effective communications?
• Web Design considerations critical• Customize with aid of Office for
Students w/Disabilities
Accessibility IssuesCaptioning Resources
• Captions preferred in separate window rather than superimposed over video
• Real and QuickTime Supported by .smil format – http:www.w3.org/AudioVideo
• WinMedia supported by .sami format• http://msdn.microsoft.com/library/
default.asp?url=/library/en-us/dnacc/html/atg_samiarticle.asp
Accessibility IssuesCaptioning Tools
• http://www.w3.org/AudioVideo• FREE SOFTWARE: Magpie
http://ncam.wgbh.org/webaccess/magpie
• COMMERCIAL SOFTWARE: CPC http://www.cpcweb.com/
Accessibility IssuesVisual Impairment
• Caption all graphics• Separate Descriptive tracks• More likely to be hardware dependent
– Braille readers• Text-to-Speech engines
