File type: Audio Video Interleave
The AVI file extension is used with Audio Video Interleave files. This commonly used wrapper format or video container was created by Microsoft to contain video data. Files with the .avi format are encoded in various codecs and usually use minimal compression than other similar formats like MOV or MPEG.
It can be opened by a variety of video players but it must able to support the codec used in encoding the video data.
The files with the .avi are in a container format for multimedia which was first introduced in November 1992 by Microsoft.
It was a part of their technology called Video for Windows.
It is used to store both video and audio in a file container that enables synchronous playback of audio and video. Similar to the DVD format, the files with the .avi format are able to support multiple streaming of video and audio.