Preservation of AV Materials in Manuscript Collections; Internal Training. Ben Harry. Brigham Young University. November 2018.
The presentation is not yet available on the internet. Some notes from the training:
“There is now consensus among audiovisual archives internationally that we will not be able to support large-scale digitisation of magnetic media in the very near future. Tape that is not digitised by 2025 will in most cases be lost.” -NFSA.gov.au, Oct. 2018
The problem with AV is Fragility:
- Playback equipment is disappearing
- Knowledgeable experts are disappearing
- Materials breaking down
- Untrained handling easily destroys materials
- Priority and Speed and Efficiency
- Train transfer operators
- Untrained handling easily destroys materials
- Unable to describe AV Content adequately in finding aids or catalogs.
- Requires certain level of specific knowledge of formats and physical carriers.
- Requires machine to read information that may not be available
- Time-consuming process for little reward
- Expensive, unstructured, uncoordinated
- Digitize material for description in basic processing
- Time-consuming process for little reward
- MUST be a lean process to minimize the effect upon processing
Actions to take:
- Prioritize Formats for Migration / Reformatting
- Maintain Transparent Records on Preservation and Access
- Link Preservation and Access (one does not happen without the other)
- Provide Curators with AV Assessment tools
- Organize a Queue System to keep things equitable (what about 12 items per month, per curator? Adjust as Necessary)
- Create Digital File Naming guidelines
- Establish Access and Preservation format standards for AV materials:
Audio Preservation
- Preservation Format: PCM / wav 96 kHZ sampling 24-bit depth. 1 GB/Hour
- Access Copy: mp3. Music: 256 kbps. Voice: 192 Kbps.
Video Preservation: Standard Def
- Preservation Format: ffv1 / mkv 720 x 486. 33 GB/Hour
- Access Copy: H.264 / mp4
Video Preservation: Hi Def
- Preservation Format: ffv1 / mkv Native: 1080i / 1080p. 100 GB/Hour?
- Access Copy: H.264 / mp4
Film Preservation
- Preservation Format: RGB ffv1 / mkv 1080i scan (MPS capability ceiling). 100 GB/Hour?
- Access Copy: H.264 / mp4
Archive and delivery methods:
- Preservation: Rosetta
- Access: various options are available.
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