THE FILE FIELD GUIDE

.vob

DVD-Video VOB

Video

VOB carries DVD video/audio/subpictures. One file need not contain a complete title; IFO/BUP and companion VOBs govern navigation/order. Distinguish standalone playback from DVD-structure playback and inspect title duration, languages and subtitles.

What it is used for: DVD video, audio and bitmap subtitles
What the file contains: Binary data

All sections, questions and sources

Content reviewed：2026-10-12 · Editor：Kai

Opening steps

Choose your environment or purpose to see its steps.

Open the DVD title

One VOB is not the complete disc structure.

Copy the usable complete VIDEO_TS directory.
Use supported DVD/folder playback.
Select title, audio and subtitles and check duration.

Inspect a standalone VOB

It may contain a menu rather than the feature.

Open a copy in a player such as VLC.
Inspect video/audio streams and duration.
Look for following segments and IFO files in the source set.

Export the intended title for viewing

Use media the software can legitimately read.

Select the intended readable title.
Choose audio/subtitle handling and export separately.
Check chapter boundaries, duration and synchronization.

Menu labels and support vary by app, OS and version. Preserve the original before making changes.

Troubleshooting by symptom

Ends early: inspect companion VOBs and title structure.
Wrong language: select the intended audio track.
Missing menus/subtitles: distinguish standalone playback from DVD navigation.
Incomplete movie: inspect full-title rather than single-segment import.
Wrong audio: select the intended language track.
Very short VOB: identify menu content or a feature segment.

Authorized DVD title → MP4

Identify the title, audio, subtitles and full duration; choose an appropriate importer.
Export separately and inspect endpoints, joins and synchronization.
Record the exported title, audio language and subtitle handling.

This is not protection bypass; blindly concatenating numbered VOBs may not reproduce the correct title.

Distinguish titles, menus and segments

A VOB may be only one segment; identify the intended title from duration and disc structure.

Source for these steps：FFmpeg · Formats Documentation / VideoLAN · VLC features

Validate audio and subtitles after migration

For multilingual media, inspect which tracks the export actually retains.

Preserve the complete source structure separately from the viewing copy.

Source for these steps：FFmpeg · Formats Documentation / VideoLAN · VLC features

Related-format differences

Related-format differences
Format	Main role	What to check
VOB	DVD media payload	Identify title/segment
IFO / BUP	Navigation/backup data	Preserve source structure
MP4	Viewing export	Title/tracks

Handling and security

Confirm usage rights and preserve the source folder before processing.

Questions and answers

Does one VOB contain the entire film?

A title may span several VOBs.

May I discard IFO?

Retain it with the DVD structure.

Does MP4 preserve menus?

Ordinary video export does not reproduce DVD navigation.

Can I rename VOB to MP4?

Export with a compatible application and choose title/audio.

Can subtitles remain selectable after export?

Inspect container/tool support and distinguish burned-in text from selectable tracks.

Format facts: name, steward and MIME type

Formal name: DVD-Video Video Object
Steward / specification: DVD-Video ecosystem
MIME type: Depends on the producer or server; an extension alone does not establish a MIME type.

Primary and official sources

Project documentationFormats Documentation
Reference for handling TS, MP4, DVD and MXF containers.
FFmpeg · Link checked：2026-10-12
Software documentationVLC features
Lists VLC media-format capabilities.
VideoLAN · Link checked：2026-10-12