digital preservation for public broadcasting
TRANSCRIPT
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DIGITAL PRESERVATIONFOR PUBLIC BROADCASTING
Rebecca FraimowNational Digital Stewardship Resident, WGBH
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TWEETING?
@amarchivepub@rhfraim#AAPB
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Mute or turn on your speakers
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Mute or turn on your microphone
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Raise your hand if you have a question (or just ask away by turning on your microphone!)
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Enter your questions or comments in the chat box!
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Introduction
Risks
File identification
File fixity
Metadata
Format recommendations
Storage
Tools
NDSR
Q&A
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WHY DIGITAL PRESERVATION?
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RISKS TO DIGITAL FILES
LACK OF IDENTIFICATIONFILE CORRUPTION
STORAGE MEDIA FAILURESOFTWARE OBSOLESCENCEHARDWARE OBSOLESCENCE
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FILE IDENTIFICATION
robot.movhigh quality master
robot.movlow-quality proxy
robot.movclip from Terminator
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FILE IDENTIFICATION: OPTIONS
FILE NAMING CONVENTIONS
Sample: FR_05182015_robots_M_01(department + date + program + purpose + ID)
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FILE IDENTIFICATION: OPTIONS
FILE NAMING:
Include recognizable and relevant identifiersInclude dates
Use sequential numbering for version controlUse leading zeros to make sure files sort in sequential order
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FILE IDENTIFICATION: OPTIONS
FILE NAMING:
include characters other than letters, numbers and underscoresuse spaces in between sections of the identifier
make file names so long they become problematic for softwareuse the same name for two different versions of a file
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FILE IDENTIFICATION: OPTIONS
Unique Identifier/GUID/UUID
Sample: 516b0360-b272-4005-b312-748542972f96
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FILE IDENTIFICATION: OPTIONS
Checksum
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VERIFYING FILES
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METADATAExternal
sidecar file databasespreadsheet
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METADATAEmbedded
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METADATA MANAGEMENT
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KEY METADATA
Unique IDChecksum/Fixity Information
Copyright InformationSource
ProgramDescription
Storage locationDate
LocationFormat/codec/wrapper
Technical specs
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KEY METADATA
Technical specs
Aspect ratioFrame rate
Bit rateSample rate
Bit depthColor space
Progressive/Interlaced
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TECHNICAL RECOMMENDATIONSAnalog-to-Digital
PRESERVATION FILEcodecs: 10-bit uncompressed v210, JPEG2000, FFV1
color space: YUVchroma subsampling: 4:2:2
aspect ratio: preserve original (for video, usually 4:3) wrappers: .mov, .avi
audio: 48 kHz/24-bit PCM
PRODUCTION MASTERScodecs: ProRes, DV50, high-quality H.264
check with production staff what they find easiest to work with
ACCESS FILEshould be suitable for web playback or streaming
can be digital or physical (DVD)codecs: low-quality H.264, MPEG-2
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Born Digital
TECHNICAL CONSIDERATIONS
What formats can you support and play back?
What do your production teams use?
How much storage space do you have?
How confident do you feel mapping important characteristics between formats?
Can you preserve metadata when transcoding?
How much computer time/staff time will it take to transcode?
What do you really need to keep?
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STORAGE
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MORE OPEN-SOURCE TOOLS
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YOUR QUESTIONS
How can you get producers onboard early in the workflow?
How do you create metadata for older media when proper documentation doesn’t exist?
How do you manage the volume with a very small staff?
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NATIONAL DIGITALSTEWARDSHIP RESIDENCY
FOR
PUBLIC BROADCASTING
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AAPB NDSR
TIMELINE
Applications: Summer 2016Residency: October 2016-July 2017
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AAPB NDSR
POTENTIAL PROJECTS
Digitization and digital migration Workflow design
Standards developmentMetadata management
Tool/DAM research and testing
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AAPB NDSR
ADVANTAGES FOR STATIONS
One year of additional archives-focused staffLink into professional PB /archival network
Final deliverable designed for long-term station benefit