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Glossary: MJPEG

MJPEG is short for Motion-JPEG which is a means of storing video footage from IP cameras and digital camcorders.

An MJPEG Movie consists of many JPEG images, one after another. Since JPEG is a compressed format, so too is MJPEG, providing a low file size when compared to image dimensions. Each frame of an MJPEG movie has no reference to the next, so inter-frame compression is not used, making MJPEG movies larger than similar MPEG movies. However, since there is no inter-frame compression the file size of an MJPEG movie will not change dependent on the complexity of the images used. This means the file size is a lot easier to estimate when looking at recording solutions.

MJPEG, being composed entirely of JPEG images, is a video-only format.  Should you require audio recording you may wish to use another codec such as MPEG or H.264.

Published on December 1st, 2008 by James Drinkwater

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