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While the web is flooded with modern formats like *.mp4, *.mkv (open-source), *.mov nowadays, you might still come across *.avi format here and there, especially for movies.
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Even though the AVI format exists for decades, it is still one of the widely-used digital video formats fit for nearly every occasion in Windows platform. It adopts a variety of codecs including XviD, DivX, Mjpeg, MPEG-4, WMV7, WMV8, H.264 to encode video. AVI, an acronym for Audio Video Interleave, is a container format for storing data in a single file in which the audio and video frames are interleaved to maintain frame synchronization.
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