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Nov 29, 2014

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ronny72

 

  • 1. SURFnets streaming media initiatives Egon Verharen Innovation management, SURFnet [email_address]
    • Why streaming
  • Past, present and future of SURFnets streaming initiatives
  • Lessons learned
  • Streaming components and organisation

2. Quotes & Provocationsby Dennis Glenn, NWU

  • Tape is dead
  • Delivery is king but content will rule
  • Quality isnot(yet) important
    • quality of video
    • QoS
  • Exposure is everything
    • Content is worth nothing if you dont show it

3. Digital Video: Similarities and Differences

  • Network video
  • Similarities:
    • formats (video H.261, H.263, MPEG 1/2) ; need fast network connections ; protocols (RTP)
  • Differences :
    • interactivity! ; bitrates (esp. high quality) ; QoS reqs. ( bandwidth/throughput, delay/latency & jitter (variation in delay), synchronisation, packet loss)

Video Conferencing Like a telephone call Two - Way Call up or Answer Video Broadcasting Like watching Television One - Way Tune Inorenter URL Streaming Webcasting 4. Digital Video: Similarities and Differences Video Conferencing Video chat Like a telephone call Two - Way Call up or Answer typicalbitrates from 56 kb/s - 1,5 mb/s Video format (H.261, H.263, MPEG) transport protocol (RTP) fast network connection QoS (min. delay, min. jitter, synchronisation Video Broadcasting Streaming/Webcasting Like watching Television One - Way Tune Inorenter URL typicalbitrates from 28 kb/s - 8 mb/s Video format (H.261, H.263, MPEG) transport protocol (RTP) fast network connection QoS (jitter, synchronisation) -Network video 5. What & Why Streaming Media

  • Streaming is buzz-word.
    • an adjective
  • Many definotions
    • Push vs. Pull
    • Client-oriented vs. server-oriented
    • on-demand vs. live
  • Streaming media: the real-time playing of a video-, audio- and/or datastream on a machine from the moment the data enters the machine.

content IT TelCo 6. Streaming media advantages

  • Watching TV on your PC
  • data does not need to be downloaded;
  • high bitrate make high (video)quality possible;
  • you can jump ahead (or back) in stream (vcr principle);
  • you can broadcast/netcast live;
  • suitable for tele-educatie,
    • but also information delivery.

7. Pieces of the puzzle

  • Why digital video (network video/video broadcast)in education

Collaborative tools

    • Conferencing
    • tools
    • Multimedia
    • archives

live event streaming webbased virtual classroom 8. Digital Content management: driving forces AnalogDigital Costs ValueLARGE archives Everywhere and alwaysaccess Create once, distribute/use many Save and secure for (re)use 9. Developments in the content chain Program maker Internetprovider Website owner Internet host Channel Cable- operator Distributer Telecom operator Author Broadcast organisation Publisher Users/Viewer Distribution media A/V/D-material Format conversion classification logical ordering 10. Progression of E-value differentiated non-differentiated market Price premium Competitive advantage User needs relevant irrelevant ingredients goods services experiences 11. Past streaming projects

  • SURF-ACE
    • Low-end (internet) streaming ->
      • SURFnet video- and audiohosting service (99)
  • Snelnet (98-00) ->
      • SNOB (99)
      • NAA in Academia (99- ..)

12. SURFnet audio- and video hosting service

  • low-end streaming service for SURFnet customers
  • RealMedia (500 conc. Streams), Windows Media andXing Streamworks (MPEG1), Xing mp3
  • cust. Encoding; interface for uploading, downloading and testing
  • streams via URL
  • 500 MB diskspace
  • live broadcasts (on request, fee)
  • Tribute MM asop. mgt partner
  • http://stream.surfnet.nl

13. Real Media

  • Version 6 operational version (july 2000)
  • Memory leak in v7 when live streaming
  • Split live and VoD in two systems
  • Licence: 500 concurrent streams (peak < 100)
  • Live archiving
  • SureStream upto 1 Mbit/s
  • Real vs MPEG-1: two paths - server plug-in Bitcasting - native MPEG-1 support ? - Real 8 quality: VHS at 0,5 full screen, 0,22 half screen and DVD at 1 MB/s

14. Real Server 8 features

  • Improved codecs (via Intel)
  • QuickTime support
  • Streaming mp3
  • Streaming Flash 4
  • Authentication(ports, IP-address, encoders, RealAdmin)
  • Encryption between server and client is possible
  • Performs best on Linux

15. Real live: multicast en splitting

  • Backchannel multicast -establishes for each client a unicast TCP-connection as control channel - clients are logged, no. of clients limited by licence
  • Scalable multicast - no connection between client and server - unlimited no. of clients possible - targetted atIntranets - combination with unicast sub-optimal
  • Splitting - application level multicast - most deployed way of large scale live broadcasts - stable - new SURFnet service

16. Xing / MPEG-1

  • MPEG-1:high quality video and audio only (mp3)
  • Not used
  • Taken over by Real Networks
  • No further development
  • Work-around fr SVP partners, that want to host ? - 20-50 GB RuG - 20 GB for SURFnet Relatiedagen

17. Windows Media

  • Version 4.1 (july 2000)
  • VoD and live
  • Free encoder + server, NT only
  • Recent small scale tests:- multicast works on server- up to 3 Mb/s - monitoring live broadcast limited compared to Real - MS MPEG-1 and MS MPEG-4 ?
  • Extensive testing planned by Tribute - scalability- financed by op.mgt contract and SURFworks

18. SNOB - SURFnet NOB project

  • Pilot service of NOB Interactive and SURFnet (resulting from Snelnet)
  • for SURFnet-customers > 8 Mbit/s
  • gathering experience with streaming media (MPEG-1;1.5 Mbit/s streams)
  • NOBi: video platform plus content
  • SN: 155 Mbit/s link to Hilversum
  • SN: streaming multicast infra.
  • http://snob.surfnet.nl

19. NAA in Academia

  • Dutch Audiovisual Archive, NOBi, SURFnet and Film Museum
  • content from NAA and FM for educational purposes
  • potential: 500.000+ hrs. Start: MPEG1 encoding 1000 hrs.
  • faculties FTTW, Journalism, communication and ULs of UvA, UNIMAAS, RUG, UU, EUR, OU, prof. educ. institutes and .
  • 1999-2001
  • new developments in video/IP and MM-indexering tested and deployed in live environment (in cooperation with VIP)

20. Metadata in NAA 21. Network topology NAA in Academia SURFnet 622 Mbit/sNAA/NOB University Faculty/UL 155 Mbit/s 34 Mbit/s- 155 Mbit/s ? ? ? MediaPark Hilversum videoserver 22. Roles/tasks technique

  • student/docent
    • PC with browser, MPEG-1 player (software), good videocard
    • connection to institutes network/SURFnet
    • support
  • Faculty/Univ. Library
    • non-congested LAN/switched LAN
    • connection to institutes network/SURFnet
    • support
  • University/computing centre
    • non congested univ-netwerk
    • non congested connection to SURFnet
    • security/access restrictions
    • support
  • SURFnet
    • - non congested national backbone
    • - connection to univ
    • - connection tomediapark NOB/NAA
    • - support
  • MediaPark
    • - non congested netwerk
    • - support
  • NOB/NAA
    • - videoserver/encoding/ streaming
    • - user interface/webserver
    • - content management
    • - support

23. NAA in Academia 24. Present Digital Video innovation projects

    • Showcase