DVD-Video Extraction
Extracting authored DVD-Video content while preserving the original structure.
An authored DVD-Video is structured differently from a normal data DVD. It typically uses a VIDEO_TS folder containing VOB, IFO and BUP files.
Understanding VIDEO_TS
The National Archives identifies VOB files as the principal video-content files on authored DVDs, with IFO and BUP files supporting menu and navigation information.
VOB, IFO and BUP files
Preservation should begin with a faithful read of the original disc. Simply converting the video to a convenient MP4 may lose menus, chapter information or other authored structures.
Menus, chapters and navigation
A preservation copy can retain the original DVD structure while a separate access derivative can provide straightforward playback on modern systems.
Preserving the authored disc
Where required, MPEG-2 content can be extracted or remuxed without unnecessary re-encoding. The chosen access format should be documented separately from the preservation copy.
Creating access files
Quality control should verify the complete VIDEO_TS structure, playback, duration, chapter or menu behaviour where relevant and file integrity.
Reference guidance: This article is informed by optical-media preservation guidance from the U.S. National Archives and the Library of Congress Recommended Formats Statement. Where appropriate, the article distinguishes preservation guidance from practical extraction procedures.
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