Even though it's not as efficient as MPEG-4, the MJPEG is still an effective way of creating video from the sequencing of JPEG images. The video from store security cameras often uses this method when being formatted.
Motion Joint Photographic Experts Group. This compression standard generally refers to JPEG images shown at high frame rate, generally 25 frames per second. It gives high quality video images, but the comparatively large file sizes of each individual image does put demands on the transmission bandwidth.
MJPEG stands for "Motion JPEG" and is a JPEG-based codec. MJPEG is identical to JPEG except that the MJPEG codecs have translators built-in to support the different capture cards. MJPEG is not the same as MPEG, although the names are confusingly similar. The primary difference is that MPEG provides temporal compression, while MJPEG only provides spatial compression. MJPEG codecs are often used as storage formats for large files that need to be archived with good quality. It is a lossy codec, but at 100% quality, the image degradation is minimal. All the JPEG codecs require significant amounts of CPU power and are not well suited for video playback. Large image and/or high frame rate movies usually don't play smoothly.
A network camera/video server using MJPEG video compression captures individual images at rates of up to a maximum of 30 individual frames per second. The captured images are presented in succession, thus producing a stream of video. This is referred to as Motion JPEG with each image frame being an entire JPEG compressed image. The result of compressing all information on each frame is high picture quality but it requires more information to be transmitted and stored. Thus, when compared with MPEG4, bandwidth usage is greatly increased with MJPEG, as is the disk space required for storage.
Motion JPEG (M-JPEG) is an informal name for multimedia formats where each video frame or interlaced field of a digital video sequence is separately compressed as a JPEG . It is often used in mobile appliances such as digital cameras.