DVD

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DVD is a standardized optical media format for the encoding and playback of digital video and audio. The DVD format is defined through standards maintained by ISO, the Optical Storage Technology Association and the DVD Forum. The format relies on the UDF filesystem, a uniform directory structure, MPEG-2 video encoding, and various forms of audio encoding. Due to the degradation of organic materials in the discs, the frequency of read errors, and the physical fragility of optical media, DVD should not be used a preservation storage media (especially Write-Once and Rewritable DVDs). The majority of the following resources focus on how to move media off of DVDs, due to this lack of stability.

Resources

How Long Can You Store CDs and DVDs and Use Them Again? by Fred Byers
http://www.clir.org/pubs/reports/pub121/sec4.html

What is the lifetime of CDs, diskettes, ZIP disks, hard drives, tapes, etc.? by Christopher Dicks
http://canada.pch.gc.ca/eng/1456340763236#faq2

An Introduction to Optical Media Preservation by Alexander Duryee
http://journal.code4lib.org/articles/9581

Image and Rip Optical Media Like A Boss by Johan Van Der Knijff
http://openpreservation.org/blog/2017/06/19/image-and-rip-optical-media-like-a-boss/

Preserving optical media from the command line by Johan Van Der Knijff
http://blog.kbresearch.nl/2015/11/13/preserving-optical-media-from-the-command-line/

How Long Is Long Term Data Storage by Barry Lunt
http://www.imaging.org/site/PDFS/Reporter/Articles/2011_26/REP26_3_4_ARCH2011_Lunt.pdf

Preserving Write-Once DVDs Producing Disc Images, Extracting Content, and Addressing Flaws and Errors by Morgan Morel
http://www.digitizationguidelines.gov/audio-visual/documents/Preserve_DVDs_BloodReport_20140901.pdf

NIST/Library of Congress (LoC) Optical Disc Longevity Study by Anna Nhan, O. Slattery, F. Byers, A. Klepchukov, J. Zheng, C. Shahani, M. Youket, E. Eusman, and N. Olson
http://www.loc.gov/preservation/resources/rt/NIST_LC_OpticalDiscLongevity.pdf

Getting Public Radio’s Legacy Off Ageing Rewritable CDs: An Interview with WNYC’s John Passmore by Trevor Owens
https://blogs.loc.gov/thesignal/2014/02/getting-public-radios-legacy-off-ageing-rewritable-cds-an-interview-with-wnycs-john-passmore/

Tools

DVDisaster http://www.dvdisaster.com/en/index.html
Disk imaging software

IsoBuster https://www.isobuster.com/
Disk Imaging software

readom from the cdrkit library https://linux.die.net/man/1/readom
Disk imaging software

ddrescue https://linux.die.net/man/1/ddrescue
Suggested command for disk imaging: ddrescue -b 2048 -r4 -v /dev/sr0 mydisk.iso mydisk.log
From Preserving optical media from the command line

disktype http://disktype.sourceforge.net/
"disktype" can be used for collecting metadata from optical discs.

ffmpeg https://ffmpeg.org/
Suggested command for making access copies: ffmpeg -i concat:input_file1\|input_file2\|input_file3 -c:v libx264 -c:a copy output_file.mp4
From ffmprovisr

VLC http://www.videolan.org/vlc/index.html
VLC can be used for playback of DVDs or .VOB files migrated off of DVDs.

MF Digital Ripstation http://www.mfdigital.com/
MF Digital sells Audio, Video, and Digital Ripstations - hardware and software designed for migrating data off of optical media.

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