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UW MediaWeb Project Jim DeRoest Director Streaming Media Technologies, ResearchChannel Assistant Director, UW Computing & Communications deroest@cac.washington.edu 206 543-6343 What We’re Up To ResearchChannel Consortium/UWTV - Exploring digital convergence and educational outreach.

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uw mediaweb project

UW MediaWeb Project

Jim DeRoest

Director Streaming Media Technologies, ResearchChannel

Assistant Director, UW Computing & Communications

deroest@cac.washington.edu

206 543-6343

what we re up to
What We’re Up To
  • ResearchChannel Consortium/UWTV - Exploring digital convergence and educational outreach.
      • National Echostar and CATV to over 5 million homes
      • International VoD and live streams – I2 Abilene
      • First cinema quality HD over IP I2 Oct ’99
      • First live 5 stream news broadcast NAB Apr ’00
      • 200Mb HD Video Conference I2 Oct ‘01
  • KEXP – UW and EMP collaboration exploring digital radio.
      • Uncompressed 1.4Mb live stream.
      • Real time web playlist generation.
      • World music format – DJ choice.
  • Faculty, Staff, Student, Clinical, Affiliate
      • HD Surgery Pavilion, Catalyst Project, etc
managing content
Managing Content
  • Problem
    • Large media libraries - multiple sources/formats:
      • RC/UWTV broadcast assets, KEXP audio library
      • UW Library, Faculty, Student, Staff, Clinical
      • Affiliate projects
    • Asset capture, encoding, metadata generation
    • Multiple Consumer Interfaces
      • RC/UWTV post production access
      • KEXP DJ access via Audiovault
      • General Viewers/Listeners
      • Distributed asset management
      • Access/Rights Controls
uw mediaweb project4
UW MediaWeb Project
  • 18 month technology/requirements review
      • Buy, build, both, call it quits?
      • Vendor products
        • Proprietary closed systems
        • 70% solution
        • Consumer specific interfaces
      • Created prototype during review process
        • Let analysts play with toys while we shopped around
        • Pluggable, Scalable, Standards based architecture
      • Decision to go with prototype
        • Analysts created a really neat toy!
uw mediaweb core services
UW MediaWeb Core Services
  • Asset Store HSM Based (HPSS)
    • Hierarchy of online/nearline multi-vendor hardware.
    • Gigabit and fiber channel interconnects.
    • Block I/O stream to servers (smoke and mirrors)
    • Distributed/Redundant environment
  • Asset Metadata Service
    • SQL, Directory, Imbedded objects
  • Stream Re-Director
    • Maintains asset locality state
    • Moves/Expires assets from stream caches
    • Re-direct asset requests to target server/interface
uw mediaweb feeds
UW MediaWeb Feeds
  • Video
      • Airtime/Dubtime to 50Mb MPEG2 i-frame base
      • Virage Video Logger metadata generation
  • Audio
      • CD ripping stations to raw audio base
      • Metadata map CDDB sites (Muse, AMG, …)
      • DJ metadata
      • May use Virage – Speech/Text

Transcode from base formats as needed

uw mediaweb metadata
UW MediaWeb Metadata
  • Schema – How rich can we afford
      • Consumer Interviews
      • Standards – Dublin Core, MPEG7
      • Vendor (Muse, AMG, Louth playlists, …)
      • Draft submitted for review by I2-VidMid
  • Access/Rights controls
      • Every vendor seems to have their own
      • Authentication Time – NetID Pubcookie, Shibboleth, …
      • Imbedded – Honored by clients

Dare we count on consistency?

  • Metadata Objects
      • SQL (base), LDAP (reflection), Imbedded objects/methods
uw mediaweb delivery
UW MediaWeb Delivery
  • Streaming Servers
      • Standard file system or API required

Stream initiated as first blocks arrive to local cache

Tape, disk, OS and network speed vs. hybrid file systems

      • Selectable stream stub support

First 30 seconds of clip to hide robot mount time

      • Low bit rate (no MPEG1)

Quicktime, Real, Windows Media

      • High bit rate

Windows Media – KEXP 1.4Mb live stream

Optivision – RC 5.6Mb live stream to remote sites

MPEG2 – Concurrent Computer Xstreme 5.6Mb

MPEG4 – Looking at Videocharger – interface issues

HD – In-house (>270Mb), vendor lower bit rates

uw mediaweb status
UW MediaWeb Status
  • Prototype operational with simple search
      • Geographically separated/mirrored server environment
      • Video: RC/UWTV content (~700 hrs MPEG2, lower bit rates)
      • Audio: Sample audio
  • Refining schema
      • Object experiments
      • Imbedded controls (MPEG7)
      • Reviewing large vendor schemas
  • Building feed systems (+35,000 disc KEXP library)
  • Defining faculty/student mgt (expiration, quotas, …)
  • Evaluating other large content requests
  • Ongoing evaluation of streaming servers
  • Expanding/Scaling/Benchmarking architecture