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Webcast production & archiving

Learn about the background, objectives, improvements, and challenges in archiving and producing web lectures at CERN. Discover the efforts to enhance process efficiency and ensure long-term data availability.

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Webcast production & archiving

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  1. End Summer Presentations 16 August 2001, CERN Webcast production & archiving Hector Sanchez San Martin Universitat Jaume I Ing. Informatica CERN ETT-DH

  2. Background introduction Main objectives (archiving & producing) Improvements Problems & future development Contents Hector Sanchez 16 August 2001 @ CERN

  3. CDS CDS Webcast service WLAP: Web Lecture Archive Project Pilot project started by IT division Delivering of video through the Internet (webcast): CERN events Implement an e-archival system for slide based lectures on the Internet Video (RealMedia) Slides(Graphic) Timing (Text file) Background introduction http://multimedia.cern.ch Syncomatic Hector Sanchez 16 August 2001 @ CERN

  4. Archiving Production of Web Lectures Long term, metadata and a systematic procedure to store it Avoids time, place, availability constraints Digital archive delivered through the Internet Keep delivering WL for future events Main objectives Hector Sanchez 16 August 2001 @ CERN

  5. Enter metadata Organiser WLAPer WLAPer WLAPer WLAPer Video service Contact speaker Obtain slides Install timing SW Set up Equipment Web Publishing Synchronise Take timing Edit video Syncomat Digitalise Record Upload Improvements: First scenario Hector Sanchez 16 August 2001 @ CERN

  6. Archiving for long term Scenario analysis deduced problems No systematic method, non scaleable data formats, no metadata Dependency on one person Process is VERY heavy and manual Tasks repeated People working in non-specialised tasks  loose of quality Re-organise the process Improvements: Key points Hector Sanchez 16 August 2001 @ CERN

  7. Enter metadata WLAPer WLAPer WLAPer Organiser Video service Contact speaker Obtain slides Set up Equipment Web Publishing Synchronise Take timing Edit video Syncomat Digitalise Record Upload Improvements: Process obtained Start timing SW Hector Sanchez 16 August 2001 @ CERN

  8. lecture metadata data metadata file talk id file raw timing file talk id notice WLAPer Video srvc Organiser WLAPer e-material & enrich raw digital video select lecture Speaker WEBCAST WEBCAST lecture slides AGE DB AGE DB timing file lecture slides digital video syncomat raw timing file raw digital video talk id talk id raw timing file lecture slides digital video timing file lecture slides digital video lecture file PRODUCTION PC PRODUCTION PC Synchr. Improvements: Data flow Agenda Maker Launcher Encoder Downloader Archiver 16 August 2001 @ CERN Hector Sanchez

  9. pcwebc02 Agenda mySQL Tk Technology used: Python Laptop download encoding upload archiver dowloader syncomat launcher Multiplatform, OO, high level, modular FTP, HTTP, mySQL, TK, COM modules used command line ActiveX ActiveX Real Producer Webcast Doc webserver HTTP command line Rmeditor Power Point Production PC Video editor Improvements: Architecture Hector Sanchez 16 August 2001 @ CERN

  10. Archiving for long term Benefits from the re-organised process A systematic archiving procedure has been set up Metadata is kept in the Agenda Maker DB  library DB Certain long term availability is guaranteed  we keep RAW data Process is more distributed  autonomy Process is more specialised  better quality Many tasks have been reviewed and automated  simpler Process is more transparent to actors  less errors Faster availability  Raw material: 1 min; Web Lecture:1/2 hour Improvements: Results (I) Hector Sanchez 16 August 2001 @ CERN

  11. New services offered Tested process: SSL 2001 New website for webcast.cern.ch 95% of the lectures have been correctly archived and synchronised Only video, printable slides, downloadable version, search,… Improvements: Results (II) Estimated reduction to 30% Hector Sanchez 16 August 2001 @ CERN

  12. Process is (sometimes) still too heavy Long term archiving Syncomat output is not scalable CERN service??  Dedicated & Permanent support Keeping raw data allow us to adapt to technological changes New efforts in having a description format independent: SMIL, LO The set up could be reduced  Permanent PC in the MA?? When not PPT timing has to be taken manually  Autotiming?? The master format has to be “convertible”  RealMedia?? Problems & future development Hector Sanchez 16 August 2001 @ CERN

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