VOB is a DVD-based multimedia container video file format developed by the DVD Forum. It is based on MPEG-2. A file with the .VOB extension can have video and audio streams, audio and video data, subtitles, disc menus, and navigation content. And all this is combined into a common stream. In this case, video playback is carried out in MPEG-2 format, and audio in various audio formats. Most often, the AC-3 format is used for this, since it provides the most favorable ratio of bitrate and sound quality. The VOB format has gained popularity as files in which you can store video and sound on DVD discs. As a rule, if they have such an extension, then the files have a place in the VIDEO_TS DVD folder in the DVD root directory. Typically, .VOB format videos are opened using any video player that supports MPEG-2 compression. There are many free players that support the .VOB format. In particular, Zoom Player, Media Player Classic VLC, Media Player, Light Alloy and others. Now popular is the paid player CyberLink PowerDVD, which has rich functionality. He specializes in playing DVD videos. VOB video files, originally called DVD Video Object File, can be accompanied by .IFO and .BUP information files.
TS is a common file format for streaming video. It is used to store video images on DVD discs. Playback is possible using a variety of DVD players and tools that edit the video. In TS format, video compression is performed using MEPG-2. This is the video codec standard (.MPEG). TS files (or Video Transport Stream File) are stored on a DVD. Their structure consists of several separate files: "moviename 1.ts", "moviename 2.ts", etc. They can be played back by software that is designed to play DVDs. Video editors are also suitable for this. In order to broadcast HDTV (high-definition television), the TS format is also used, which is specially designed taking into account that the signal reception capabilities may change. TS format provides the ability to correct errors if the signal is weak. If you compare with other formats, it also better synchronizes the video stream. TS is designed to store and transmit audio, data and video in ATSC and DVB systems. TS files can be reformatted to .QPH files using the conversion utility provided with Nokia Qt SDK. Compared to TS, files with the extension QPH can be used for more applications. TS and QPH files are stored in XML format.