Digitization Policy

FILM TRANSFERS

-Master file: 10-bit uncompressed YUV Quicktime file
Resolution: 1920 x 1080
Aspect Ratio: 4:3
Color Sampling: 4:4:4 RGB
Frame Rate: 29.97
Bit Rate: 190 MB/sec
Audio Sample Rate: 48 kHz
Audio Bit Depth: 24

-Intermediate File: DV25 Quicktime file
Resolution: 720 x 480
Aspect Ratio: 4:3
Color Sampling: 4:1:1
Frame Rate: 29.97
Bit Rate: 25 MB/sec
Audio Sample Rate: 48 kHz
Audio Bit Depth: 16

-Access File: MPEG-2 file
Resolution: 720x480
Aspect Ratio: 4:3
Color Sampling: 4:1:1
Frame Rate: 29.97
Bit Rate: 7.2 MB/sec
Audio Sample Rate: 48 kHz
Audio Bit Depth: 16

VIDEO TRANSFERS

-Master file: 8-bit uncompressed YUV Quicktime file
Resolution: 720x480
Aspect Ratio: 4:3
Color Sampling: 4:2:2
Frame Rate: 29.97
Bit Rate: 90
Audio Sample Rate: 48 kHz
Audio Bit Depth: 16

-Intermediate File: DV25 Quicktime
Resolution: 720x480
Aspect Ratio: 4:3
Color Sampling: 4:1:1
Frame Rate: 29.97
Bit Rate: 25
Audio Sample Rate: 48 kHz
Audio Bit Depth: 16

-Access File: MPEG-2
Resolution: 720x480
Aspect Ratio: 4:3
Color Sampling: 4:1:1
Frame Rate: 29.97
Bit Rate: 7.2
Audio Sample Rate: 48 kHz
Audio Bit Depth: 16

7 NFPF preserved items DIGIBETA TRANSFERS

-Master file: 10-bit uncompressed YUV Quicktime file
Resolution: 720 x 486
Aspect Ratio: 4:3
Color Sampling: 4:2:2
Frame Rate: 29.97
Bit Rate: 88 MB/sec
Audio Sample Rate: 48 kHz
Audio Bit Depth: 16

-Intermediate File: DV25 Quicktime file
Resolution: 720 x 480
Aspect Ratio: 4:3
Color Sampling: 4:1:1
Frame Rate: 29.97
Bit Rate: 25 MB/sec
Audio Sample Rate: 48 kHz
Audio Bit Depth: 16

-Access File: MPEG-2 file
Resolution: 720x480
Aspect Ratio: 4:3
Color Sampling: 4:1:1
Frame Rate: 29.97
Bit Rate: 7.2 MB/sec
Audio Sample Rate: 48 kHz
Audio Bit Depth: 16

The film will be scanned using a flying spot system. The video playback path for digitization will begin in a 3/4” U-Matic VTR, utilizing the BVU-950’s internal TBC, then through an AJA FSI analog to an SDI converter frame synchronizer, with the SDI/AES audio output into the SDI/AES audio input of a Digital Rapids DCR2600 capture card. The tape transfer should be as “flat” as possible, using color bars and tone on the tape as a reference, assuming the tapes have these references signals and they match the active video. Processing amplifier controls on the TBC should only be used when necessary to match the color bar and tone on the tape, and to ensure that the quality of the files is as close to the original tape as possible. All equipment will be thoroughly calibrated and cleaned before performing transfers. Preservation staff will proceed with transfer in accordance with established best practices for film and video preservation.

The files should be verified and authenticated using the MD5 Checksum. Technical, preservation, and rights data should be added to a database, and stored along with descriptive data and the digital file in an open MXF wrapper. For preservation, each master file will be copied to two LTO digital tapes using an open source backup application and will be geographically dispersed to two locations. Every 5-years the file will be re-verified, and then copied to LTO tape two generations above the previous generation. Migration work should be tracked in a database that will also flag file formats that appear close to obsolescence.

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