Site Home Articles Web Forum File Archive Web Store Top Navigation
 
News
Site News
Tech News
Open News
Debate & Rants
Submit News

Archive
Archive
Articles
Games
Reading
Reviews
Videos
Old KBase
Old Archive

Interaction
IRC Chat
Web Forum

Resources
Anonymity
Dist. Computing
DNS Tools
File Sharing
Gatherings
Terminology
Virus Advisory
Zine Listing

Other
Encrypt
Store
Photo Album

Links
Outward Links
Request Swap
Link to Us

Add Content
Submit Article
Submit Book
Submit FAQ
Submit Game
Submit Files
Submit Review
Submit Terminology
Submit Video

Connect
About
Advertising
Contact
Donate
Jobs

View us Online
Twitter
Facebook

Assistance
Official FAQ
Official Rules
 
Quick Links
Get Firefox!
GoNix.org
DollarDNS
 


Defining Term

Video Object (VOB)



Description

A VOB file (Video Object) is a container format in DVD-Video media.



Defined As

VOB can contain video, audio, subtitle and menu contents multiplexed together into a stream form. VOB 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.

Analogous to the MPEG program stream, VOB file can contain H.262/MPEG-2 Part 2 or MPEG-1 Part 2 video, MPEG-1 Audio Layer II or MPEG-2 Audio Layer II audio, but usage of these compression formats in a VOB file has some restrictions in comparison to the MPEG program stream.

In addition, VOB can contain Linear PCM, AC-3 or DTS audio and subpictures (subtitles). VOB file cannot contain AAC audio (MPEG-2 Part 7), MPEG-4 compression formats and others, which are allowed in MPEG program stream standard.

On the DVD, all the content for one title set (VTS) is contiguous, but broken up into 1 GiB VOB files in the computer compatible file systems for the convenience of the various operating systems. Each VOB file must be less than or equal to one GB.

Other DVD files include IFO and BUP files. IFO (Info) files contain all the information a DVD player needs to know about a DVD so that the user can navigate and play all DVD content properly (e.g., where a chapter starts, where a certain audio or subtitle stream is located, information about menu functions and navigation, etc.).

BUP (Backup) files are an exact copy and backup of IFO files in case of corruption.

VOB files without IFO or BUP files do not allow DVD menu navigation. Images, video and audio used in DVD menus are stored in VOB files.



[File Report]
- v5.0