vob file is a container format used by DVD video media; vob multiplexes digital video, digital audio, subtitles, DVD menus and navigation and other content into a stream format. Files in vob format can be Encryption protection; vob is often used for DVD video objects. It is a key file on a DVD disc and contains the actual data of the video disc.
#The operating environment of this tutorial: Windows 10 system, Dell G3 computer.
What is the format of vob file?
vob file is a container format used by DVD video media.
VOB (Video Object) is a container format used by DVD video media. VOB multiplexes multiple contents such as digital video, digital audio, subtitles, DVD menus and navigation in one stream format. Files in VOB format can be protected by encryption.
VOB is often used in DVD video objects. It is the key file on the DVD disc and contains the actual data of the DVD video. In fact, the VOB file is a basic MPEG-2 data stream, including a multi-channel composite MPEG-2 video data stream, audio data stream (usually encoded in AC3 format) and subtitle data stream.
VOB files are used to save all audio and video data in MPEG-2 format. These data not only include the video itself, but also pictures for menus and buttons, and sub-picture streams for various subtitles.
VOB format files have a .vob extension and are generally saved in the VIDEO_TS subdirectory of the root directory of the DVD disc. The VOB format is based on the MPEG program stream (MPEG-PS) format, but has some additional restrictions and regulatory requirements for private streaming media. For non-standard data used in VOB files, MPEG program streams are specified in the so-called private stream format. VOB files are a strict subset of the MPEG program stream standard. All VOB files are MPEG program streams, but not all MPEG program streams meet the definition of VOB files.
Similar to MPEG program streams, VOB files contain H.262/MPEG-2 Part 2 or MPEG-1 Part 2 encoded video, and MPEG-1 or MPEG-2 Audio Layer II encoded audio. However, compared with MPEG program streams, these compression formats in VOB files have limitations. Otherwise, VOB contains linear PCM, AC-3 or DTS encoded audio and subtitles. VOB files cannot contain AAC audio (MPEG-2 Part 7), MPEG-4 compression format, or other formats, but these are allowed by the MPEG program stream standard.
On a DVD disc, all content under a title set is continuous. But for the convenience of file systems compatible with various computer operating systems, it is divided into 1GB VOB files. Each VOB file must be less than or equal to 1GB.
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