UW MediaWeb Project Jim DeRoest Director Streaming Media Technologies, ResearchChannel Assistant Director, UW Computing & Communications

What Were 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 Mb 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 Problem Large media libraries - multiple sources/formats: 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 Asset capture, encoding, metadata generation Multiple Consumer Interfaces Multiple Consumer Interfaces RC/UWTV post production access KEXP DJ access via Audiovault General Viewers/Listeners Distributed asset management Access/Rights Controls

UW MediaWeb Project 18 month technology/requirements review Buy, build, both, call it quits? Vendor products Proprietary closed systems Proprietary closed systems 70% solution 70% solution Consumer specific interfaces Consumer specific interfaces Created prototype during review process Let analysts play with toys while we shopped around Let analysts play with toys while we shopped around Pluggable, Scalable, Standards based architecture Pluggable, Scalable, Standards based architecture Decision to go with prototype Analysts created a really neat toy! Analysts created a really neat toy!

UW MediaWeb Architecture Asset Store, Metadata and Re-Director Services Broadcast Post Production Radio DJ Audiovault Transcoding Metadata Generation Asset Capture Streaming Services

UW MediaWeb Core Services Asset Store HSM Based (HPSS) Hierarchy of online/nearline multi-vendor hardware. Hierarchy of online/nearline multi-vendor hardware. Gigabit and fiber channel interconnects. Gigabit and fiber channel interconnects. Block I/O stream to servers (smoke and mirrors) Block I/O stream to servers (smoke and mirrors) Distributed/Redundant environment Distributed/Redundant environment Asset Metadata Service SQL, Directory, Imbedded objects SQL, Directory, Imbedded objects Stream Re-Director Maintains asset locality state Maintains asset locality state Moves/Expires assets from stream caches Moves/Expires assets from stream caches Re-direct asset requests to target server/interface Re-direct asset requests to target server/interface

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 Transcode from base formats as needed

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 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 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