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| Name | AVI | VOB |
| Full name | AVI - Microsoft Audio/Visual Interleaved | VOB - Video Object |
| File extension | .avi | .vob |
| MIME type | video/vnd.avi, video/avi, video/msvideo, video/x-msvideo | video/dvd, video/x-ms-vob |
| Developed by | Microsoft | DVD Forum |
| Type of format | video file format | Media container |
| Description | Audio Video Interleaved (also Audio Video Interleave), known by its initials AVI, is a multimedia container format introduced by Microsoft in November 1992 as part of its Video for Windows software. AVI files can contain both audio and video data in a file container that allows synchronous audio-with-video playback. | VOB (Video Object) is the container format in DVD-Video media. VOB can contain digital video, digital audio, subtitles, DVD menus and navigation contents multiplexed together into a stream form. Files in VOB format may be encrypted. |
| Technical details | AVI is a derivative of the Resource Interchange File Format (RIFF), which divides a file's data into blocks, or "chunks." Each "chunk" is identified by a FourCC tag. An AVI file takes the form of a single chunk in a RIFF formatted file, which is then subdivided into two mandatory "chunks" and one optional "chunk". | Files in VOB format have a .vob filename extension and are typically stored in the VIDEO_TS directory at the root of a DVD. The VOB format is based on the MPEG program stream format, but with additional limitations and specifications in the private streams. VOB files may be accompanied with IFO and BUP files. These files respectively have .ifo and .bup filename extensions. |
| Associated programs | Windows Media Player, Windows Movie Maker, Avidemux, AviSynth, Adobe After Effects, Media Player Classic, VLC. | MPlayer, VLC media player, GOM player, Media Player Classic |
| Wiki | https://en.wikipedia.org/wiki/Audio_Video_Interleave | https://en.wikipedia.org/wiki/VOB |