.vob

What is a .vob file?

VOB is the raw video/audio container format used on DVD-Video discs.

Safe format
Type Video
By DVD Forum
MIME video/mpeg

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What is it

Pop a DVD into a computer and poke around the VIDEO_TS folder — those chunky .vob files are the movie itself. VOB is essentially MPEG-2 video wrapped with AC3 or DTS audio, multiplexed into a container that DVD players know how to navigate. Each file caps at roughly 1 GB because the format dates from the FAT32-friendly late '90s.

The format carries no DRM by itself — that's handled by CSS encryption on the disc level. Once ripped, a VOB file is just standard MPEG-2 that any decent media player can handle. VLC plays them without flinching. The catch is that individual VOB files may be fragments of a larger title, so you sometimes need to concatenate them or use a DVD-aware tool to get the full movie.

For anything modern, convert to MP4. HandBrake reads DVD folder structures natively and produces clean H.264 output. There's no technical reason to keep video in VOB unless you're authoring DVDs — and if you're still authoring DVDs, you already know that.

Technical details
Full Name
DVD Video Object
MIME Type
video/mpeg
Developer
DVD Forum
Magic Bytes
00 00 01 BA
Safety
.vob is a known, safe format. Pure video/audio data container. No executable content.
What opens it
VLC
FREE Windows / Mac / Linux
MPV
FREE Windows / Mac / Linux
HandBrake
FREE Windows / Mac / Linux
FAQ
How do I play a VOB file?
Open it in VLC — it handles VOB files without any codec installation. If the VOB is part of a DVD folder structure, open the VIDEO_TS folder in VLC for proper menu and chapter navigation.
Can I convert VOB to MP4?
Yes. HandBrake reads VOB files and full DVD folder structures, converting to MP4 with H.264 video. For quick conversion, VLC can also transcode VOB to MP4 via its Convert/Save dialog.
Why are there multiple VOB files on a DVD?
DVDs split video into ~1 GB chunks (VTS_01_1.vob, VTS_01_2.vob, etc.) due to filesystem limitations. They play sequentially as a single continuous movie.
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