5 16-12 curated series #2 presentation

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Hot Topics: The DuraSpace Community Webinar Series
Series Two: All About Audio and Video Content in Repositories
5-16-12 Webinar, Preserving Audio & Video Digital Media

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5 16-12 curated series #2 presentation

  1. 1. Hot Topics: The DuraSpace Community Webinar Series Series Two: Managing and preserving audio and video in your digital repository Curated by Karen CarianiMay 16, 2012 Hot Topics: DuraSpace Community Webinar Series
  2. 2. Using the Webinar Platform• 2-way audio for all participants is muted• We’ll utilize the Chat Window for the Q&A portion or you may use it if you are having technical difficulties• You may type your question here & hit ‘enter’
  3. 3. Webinar 1: The Big Picture: Preserving Audio & Digital Media Presented by: Karen Cariani, Karen Colbron & Dave MacCarnMay 16, 2012 Hot Topics: DuraSpace Community Webinar Series
  4. 4. About our presenters • Karen Cariani, Director, Media Library & Archives, WGBH Boston • Karen Colbron, Digital Archives Manager, WGBH Boston • Dave MacCarn, Chief Technologist, WGBH BostonMay 16, 2012 Hot Topics: DuraSpace Community Webinar Series
  5. 5. Digital media preservation Karen Colbron, Digital Archives Manager
  6. 6. Who we are:WGBH Media Library and Archives
  7. 7. The Analog to Digital Challenge© 2012 WGBH
  8. 8. The Analog Challenge
  9. 9. Common (and some not so common) formats• 16mm film (some 35mm) • Digital betacam• 2” videotape • D1, D2, D3, D4, D5• 1” videotape • DVCam• 3/4” videotape • DVCPro & DVCProHD• Betacam • Mini DV & HDV• BetamaxMII© 2012 WGBH
  10. 10. Analog migration choices• 2” tape ------> digi-beta --------> digital file?• 2” tape ------------------------------> digital file?• Is the expense and capture the same?• Capture time is double - extra pass/ step © 2012 WGBH
  11. 11. Where do we go from here? • TAPE • BORN DIGITAL - Condition - Codecs/wrappers - Machinery - Nested data - Priorities - Playback - Storage© 2012 WGBH
  12. 12. The shift from analog to digital content creation• Before we had 1 shoot, 10 physical tapes, many shots per tape• Now each time the camera is turned off, new file created• Now 1 shoot, many many files for each shot © 2012 WGBH
  13. 13. Who wants to be the sheriff in the wild west?• Different formats being created all the time.• Different cameras generate different folder structures• Creators may vary codecs within the same camera/shoot• Keeping pace with plugins to play/capture media © 2012 WGBH
  14. 14. Folder Structure • Create folders by card – Assign unique number – Continue numbers – Add description – Place ENTIRE card contents into this folder!!
  15. 15. Video, video, where for art thou video?© 2012 WGBH
  16. 16. Finding both audio & video© 2012 WGBH
  17. 17. Storage and retrievalHow do we:• Capture the audio and video generated by myriad cameras• Store the project information to allow potential re-edit• Store files with rich, meaningful metadata• Store born-digital materials• Display and retrieve born-digital materials © 2012 WGBH
  18. 18. Open Text Artesia DAM© 2012 WGBH
  19. 19. Open Text Artesia DAM© 2012 WGBH
  20. 20. Video ingest tools© 2012 WGBH
  21. 21. Original footage© 2011 WGBH
  22. 22. Open Text Artesia DAM© 2012 WGBH
  23. 23. How do we get here?© 2012 WGBH
  24. 24. Proposed tapeless workflow• Create a mapping document between filemaker and DAM• Used to generate an xml stylesheet• Video is ingested simultaneously with the metadata from filemaker using the xml stylesheet• Technical metadata is ingested simultaneously with the video and production data using the xml generated by the source digital files © 2012 WGBH
  25. 25. That was easy, wasn’t it?• Plug-ins to view files• Depending on the file type we may have to re- wrap to a quicktime wrapper, or fully transcode the source file• Redundant storage of raw and wrapped materials• Quality of data © 2012 WGBH
  26. 26. We put things in. We take things out.27 © LC-USE6-D-002716
  27. 27. Digital media preservationDave MacCarn, Chief Technoligist
  28. 28. From Analog to Digital to HD• The Machine was the format.• Now the format is file containing a codec and a wrapper.• Explosion of new formats with the start of standard-definition digital video and an even broader array of options for high–definition recording.May 16, 2012 Hot Topics: DuraSpace Community Webinar Series
  29. 29. 30
  30. 30. Lots of Data to Collect• The Math: – 1920 horizontal pixels x 1080 vertical lines x 30fps x 3 samples/pixel x 8- 10 bits/sample = >1.2 billion bits per second.May 16, 2012 Hot Topics: DuraSpace Community Webinar Series 31
  31. 31. Techniques for Data Reduction:• Resolution Sub-sampling• Video Encoding/Sampling• Video CompressionMay 16, 2012 Hot Topics: DuraSpace Community Webinar Series 32
  32. 32. Chroma & Luma Sample No Chroma Sample 4:4:4 4:2:2 4:2:0May 16, 2012 Hot Topics: DuraSpace Community Webinar Series 33
  33. 33. Video Compression• DCT (discrete cosine transform)• Wavelet transform• MPEG• H.264 (AVC)• MPEG4 Studio ProfileMay 16, 2012 Hot Topics: DuraSpace Community Webinar Series 34
  34. 34. 35
  35. 35. 36
  36. 36. May 16, 2012 Hot Topics: DuraSpace Community Webinar Series 37
  37. 37. Containers• AVI• DV-DIF• QuickTime• FLV• MP4• Motion JPEG2000• MXFMay 16, 2012 Hot Topics: DuraSpace Community Webinar Series 38
  38. 38. The Scrambling Problem• Howard Besser – Digital Longevity – http://besser.tsoa.nyu.edu/howard/P apers/sfs-longevity.html• Adds to the complexity of the archive.• MXF uses KLV – The requirement of a library of Keys.May 16, 2012 Hot Topics: DuraSpace Community Webinar Series
  39. 39. Practice• Store as few different wrappers as possible. – Rewrap if you can.• Know your codecs.• If you need to transcode make the product of equal or higher quality.• Watch out for encoding changes.• Know your licensing.May 16, 2012 Hot Topics: DuraSpace Community Webinar Series
  40. 40. Questions? Karen Colbron WGBH Boston Karen_colbron@wgbh.org Dave MacCarn WGBH Boston Dave_maccarn@wgbh.orgMay 16, 2012 Hot Topics: DuraSpace Community Webinar Series
  41. 41. Solutions for Digital Media Preservation• DuraCloud is simple, flexible and cost effective• DuraCloud offers expandable storage space as needed for your media files• Streaming media services availableMay 16, 2012 Hot Topics: DuraSpace Community Webinar Series
  42. 42. Solutions for Digital Media Preservation • Sign up for a free 2 month trial account today www.duracloud.org • Priced for every budget http://duracloud.org/pricingMay 16, 2012 Hot Topics: DuraSpace Community Webinar Series

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