AVI is short for Audio Video Interleave or Audio Video Interleaved; it is a multimedia container format introduced by Microsoft in November 1992 as part of its Video for Windows technology. Most AVI files also use the file format extensions developed by the Matrox OpenDML group in February 1996. These files are supported by Microsoft, and are unofficially called "AVI 2.0".
As a multimedia container format, AVI files can contain both audio and video data in a file container that allows synchronous audio-with-video playback. Like the DVD video format, AVI files support multiple streaming audio and video, although these features are seldom used. Furthermore, as a derivative of the Resource Interchange File Format, AVI files can be tagged with metadata in the INFO chunk. In addition, AVI files can embed Extensible Metadata Platform.
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