5 16-12 curated series #2 presentation

Hot Topics: The DuraSpaceCommunity Webinar Series

Series Two: Managing and preserving audio and

video in your digital repository

Curated by Karen Cariani

May 16, 2012 Hot Topics: DuraSpace Community Webinar Series

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’

Webinar 1: The Big Picture:Preserving Audio & Digital Media

Presented by: Karen Cariani,

Karen Colbron & Dave MacCarn


About our presenters

• Karen Cariani, Director, Media Library & Archives, WGBH Boston

• Karen Colbron, Digital Archives Manager, WGBH Boston

• Dave MacCarn, Chief Technologist, WGBH Boston


Digital media preservation

Karen Colbron, Digital Archives Manager

Who we are: WGBH Media Library and Archives

The Analog to Digital Challenge

© 2012 WGBH

The Analog Challenge

Common (and some not so common) formats

© 2012 WGBH

• 16mm film (some 35mm)• 2” videotape• 1” videotape• 3/4” videotape• Betacam• BetamaxMII

• Digital betacam• D1, D2, D3, D4, D5• DVCam• DVCPro & DVCProHD• Mini DV & HDV

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

Where do we go from here?

• TAPE- Condition- Machinery- Priorities

© 2012 WGBH

• BORN DIGITAL- Codecs/wrappers- Nested data- Playback- Storage

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

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

• Create folders by card– Assign unique

number– Continue numbers– Add description– Place ENTIRE

card contents into this folder!!

Folder Structure

Video, video, where for art thou video?

© 2012 WGBH

Finding both audio & video

© 2012 WGBH

Storage and retrieval

How 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

Open Text Artesia DAM

© 2012 WGBH

Video ingest tools

© 2012 WGBH

Original footage

© 2011 WGBH

Open Text Artesia DAM

© 2012 WGBH

How do we get here?

© 2012 WGBH

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

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

We put things in. We take things out.

27 © LC-USE6-D-002716

Digital media preservation

Dave MacCarn, Chief Technoligist

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.


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.

31May 16, 2012 Hot Topics: DuraSpace Community Webinar Series

Techniques for Data Reduction:

• Resolution Sub-sampling• Video Encoding/Sampling• Video Compression


33

4:4:4

4:2:2

4:2:0

Chroma & Luma SampleNo Chroma Sample


Video Compression

• DCT (discrete cosine transform)• Wavelet transform• MPEG• H.264 (AVC)• MPEG4 Studio Profile


Containers

• AVI• DV-DIF• QuickTime• FLV• MP4• Motion JPEG2000• MXF


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.


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.

Questions?


Karen ColbronWGBH Boston

[email protected]

Dave MacCarnWGBH Boston

[email protected]


• DuraCloud is simple, flexible and cost effective

• DuraCloud offers expandable storage space as needed for your media files

• Streaming media services available

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/pricing

Solutions for Digital Media Preservation

5 16-12 curated series #2 presentation

Technology

Transcript of 5 16-12 curated series #2 presentation