VOB

VOB stands for Video Object. It is a file format used for storing video and audio data on DVDs. VOB files are typically found in the VIDEO_TS folder of a DVD and contain the actual video, audio, and subtitle streams of the movie or TV show.

Overview

VOB files are based on the MPEG-2 format, which is a widely used compression standard for video and audio. They can contain multiple video and audio streams, allowing for different languages or versions of a movie to be included on a single DVD.

The video data in a VOB file is encoded using MPEG-2 video compression, which provides high-quality video while keeping file sizes relatively small. The audio data is typically encoded using either MPEG-1 Layer 2 or Dolby Digital (AC-3) compression.

Structure

A VOB file is composed of several different types of data. The main components include:

1. Video Streams: These contain the actual video frames of the movie or TV show. Each video stream is encoded using MPEG-2 compression and can have different resolutions and bitrates.

2. Audio Streams: These contain the audio tracks of the movie or TV show. Each audio stream can be encoded using different audio codecs, such as MPEG-1 Layer 2 or Dolby Digital.

3. Subtitle Streams: These contain the subtitles or captions for the movie or TV show. Subtitles can be in various languages and are typically displayed on the screen during playback.

4. Navigation Data: This includes information about the structure of the DVD, such as chapter markers, menu navigation, and other interactive features.

Playback

VOB files can be played back on DVD players, DVD-ROM drives, and some media players that support the MPEG-2 format. When a DVD is inserted into a player or drive, the player reads the VOB files from the VIDEO_TS folder and plays them back in the correct order.

Some media players and video editing software also allow you to extract the video, audio, and subtitle streams from VOB files for further editing or conversion to other formats.

Conclusion

VOB files are an essential part of the DVD format, allowing for the storage and playback of video, audio, and subtitle data. They are widely used in the entertainment industry and have become a standard for distributing movies and TV shows on DVDs.

For more information about VOB files and DVD technology, you can visit the DVD article.

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