Contents:
- Introduction
- Notes on the preservation of optical disc media
- Producing disc images: tools and technologies to create the ISO files
- Findings from the 2014-2014 reformatting job
- Defect summary and advisory
- Advice about possible automation
- Additional considerations
- Appendix A: Understanding, Accessing, and Using the Command Line on a Mac
- Appendix B: Installing ddrescue on a Mac computer
- Appendix C: Cloning ISOs from DVD-Video discs
- Appendix D: Using MPEG Streamclip to Extract MPEG-2 files from VOBs Inside the ISO images
- Appendix E: Compressor settings for MPEG-2 Encoding
- Appendix F: Methods of VOB Concatenation
- Appendix G: The Structure of a VIDEO_TS folder
- Appendix H: Working with DVD_isorip.sh
- List of References and Contributors
This report’s subtitle is “Producing Disc Images, Extracting Content, and Addressing Flaws and Errors”. As part of a 500-disc reformatting project began in 2013, the Library of Congress asked GBAVF (George Blood Audio Video Film, a consulting company) to document the issues they encountered and to report on the steps they took to remedy the problems. This report is the result of that effort, offering an overview of the range and extent of the issues, as well as describing the corrective tools and processes that were used. This report also offers some ideas and recommendations that pertain to workflow elements that may lend themselves to automation. The report contains general information about reformatting optical disc media with a focus on DVD-Video discs and the processes of cloning and extracting the data. Additionally, the report contains a detailed explanation of the methods used be GBAVF, a summary analysis of their findings, and advice about automating the process. Footnotes are used throughout the report to explain a number of the technical terms mentioned and discussed. Additionally, an online glossary of terms related to DVDs is available on Jim Taylor’s DVD demystified website. This report provides a complement to the DVD section of the “Creating and Archiving Born Digital Video, Part II: Eight Federal Case Histories” drafted by the Smithsonian Institution Archives.
This is an authoritative resource for any archive planning to archive dvds. It offers methodologies, specific resources and most important, provides archivists responsible for dvd content migration details on potential errors and damage repair options based on extensive and recent experience.