Video Object (VOB)

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Video Object (VOB)

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Definition

VOB (Video Object) is the container format in DVD-Video media. VOB can contain digital video, digital audio, subtitles, DVD menus and navigation contents multiplexed together into a stream form. Files in VOB format may be encrypted.
 

Files in VOB format have a .vob filename extension and are typically stored in the VIDEO_TS directory at the root of a DVD.
The VOB format is based on the MPEG program stream format, but with additional limitations and specifications in the private streams. The MPEG program stream has provisions for non-standard data (as used in VOB files) in the form of so-called private streams. VOB files are a very strict subset of the MPEG program stream standard.
While all VOB files are MPEG program streams, not all MPEG program streams comply with the definition for a VOB file.

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References

1. Wikipedia: https://en.wikipedia.org/wiki/VOB
2. Wikidata: Video Object (Q1884715)