Upload
gabriella-hickey
View
218
Download
3
Tags:
Embed Size (px)
Citation preview
Behind the Scenes:SURFnet Video Portal
The next generation of streaming video services for research and higher education in The Netherlands
Egon VerharenInnovation managerAdvanced Services<[email protected]>
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 2
SURFnet
• The national computer network for higher education and research in the Netherlands
– 150 member institutions (universities, colleges, research centres, academic hospitals and scientific libraries)
– approx. 750.000 users (students, employees)
– SURFnet is a subsidiary company of the SURF Foundation
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 3
SURFnet 5: advanced wide area network
• Backbone: 2x 10 Gbit/s• Client connections:up to 1 Gbit/s• Multicast enabled• Native IPv4/IPv6
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 4
Not only sufficient bandwidth towards the institutions
• 20.000 students 10-100 Mbit/s at home in fiber-to-the-dormitory initiatives
• Growing amount of wide open ADSL users at home (SurfSnel ADSL): 2-8 Mbit/s
GEthsw-eth
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 7
• low-end streaming service for member institutions
• RealMedia, Windows Media and MPEG-1 through Xing Streamworks and Bitcast plugin for Real, Xing mp3
• URL clickable streams (can be added to webpages)
• 500 MB free storage
• live ‘broadcasting’ (on request)
Where it started: SURFnet Audio- and Videohosting service ’99- ’03
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 9
Conclusions Av@lon pilot
• Streaming makes available educational content easier and more efficiently
• Streaming technology and internet network infrastructures are ready for educational usage of streaming
• ‘Order and delivery’ process needs improvement• Multi-disciplinary approach is essential • Teachers and students need new skills and support
• Follow up (2003): DAVIDEON project (1000 hr) development of educational scenario’s
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 13
SURFnet Video Portal: since 2003
• Combining the results of projects and other initiatives in a ‘next generation streaming video environment’
– Production– Distribution– Information retrieval– Online video editing and conversion tools– Manuals and instructional content, workshop– Community (forum)
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 14
SURFnet guide/manual for producing streaming video
• Manual in PDF format– UvA, VU and UVT– Production aspects
(storyboards, recording and editing audio and video)
– Publishing and distribution (on the internet)
– Copyright issues– Examples
• Workshops
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 15
Workshop
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 16
SVP distribution: Storage of streaming files
• Windows Media
• Real media
• Quicktime
• MPEG streaming server: Kasenna Mediabase XMP
– MPEG-1– MPEG-2– (ISMA) MPEG-4
• 1 GB storage for free/institute
SURFnet streaming servers with file management environment
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 17
Information retrieval: Search and browse facilities
• Not easy to find streaming files
• Solution:attach metadata tag with descriptive information to streaming file
based on Qualified Dublin Core standard
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 18
SVP Metadata model
TitleTitle.AlternativeCreatorSubjectDescriptionDescription.AbstractPublisher Contributor Language Relation Coverage.SpatialCoverage.Temporal Rights
Date.CreatedDate.Valid Date.Available Date.IssuedTypeFormat.ExtentFormat.MediumIdentifierSource
Element printed in green are required fields
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 19
Information retrieval: Search engine
organization Y
organization X
SURFnet
Search engine
streaming server
streaming server
streaming server
streaming server
streaming server
streaming server
Metadatainput
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 20
Information retrieval: end user web interface
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 21
File protection
• Authentication layer to make streaming files only available to selective user group:Hostname based authentication(no need to distribute username – password to end-users)
1. File is only available to one or more organizations that are part of the SURFnet community.
2. File is available to all SURFnet member organizations
3. File is publicly available (no file protection)
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 22
File protection: Admin interface
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 23
Example of file protectionend user screen
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 24
SURFnet media conversie service
AVI
MPEG-2
MPEG-1
MPEG-1
MPEG-4
Real
WMV /ASF
Quicktime
input formats output formats
Convert source file to streaming media file types through web application
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 25
Transcoding tool: interface
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 26
Editing tool: selectionVirtual Cutting Machine
• Developed by Andre Rosendaal (Groningen University)
• Select part of file
• Reference to the selection in the original file
Fragment
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 27
Editing tool: playlists
• Combine several streaming fragments into one stream
File Y
selection 2
playlist A
File X
selection 1
File Z
selection 3
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 28
Editing tool: interface
/s/surfnet/real/tnc2003.rm
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 29
Editing tool: interface
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 30
SVP asset management
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 31
SURFnet Video Portal website http://video.surfnet.nl/ http://videosearch.surfnet.nl/
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 32
Enhancements: SVP2• Person and Realm based access control
– Through institutes authentication services• Presentation tools• More mediatypes• Improvements in batch upload, batch asset
mgt
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 33
Person-based access control• Using RADIUS infrastructure or A-Select
(authentication selection infrastructure)
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 34
Person based access control
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 35
SVP2 mediafile protection
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 36
SVP2 asset management
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 37
Batch mgt
©2004 SURFnet, SURA/ViDe Digital Video workshop 2004 40
Conclusion/success factors
• Technology and networks are ready• knowledge dissemination inside and between
institutions essential• Stimulate small scale pilots (technology education)• Multi-disciplinary approach essential
Building the chain between:StudentsTeachersLearning technologistsLibrariansAV specialistsNetwork technologistsContent providersNREN