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AVI:
AVI stands for Audio Video Interleave. AVI files are basically a
number of images called frames. When the file is played, the player,
Media Player for example, chugs through the AVI file and displays
each consecutive image in the same way that movie film rolling through
a projector displays a movie.
AVI
files may contain thousands of frames, and all of that picture information
can produce very large file sizes. To reduce AVI file size, the
AVI video data is compressed using various compression algorithms.
These compression algorithms are called codecs. While it is possible
to create an uncompressed AVI, the file size is enormous. Type 1
AVI files are limited to a 2GB file size, and an uncompressed AVI
file may realize that size limit in 2 minutes. Therefore almost
all AVI files are compressed.
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