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Glossary / M

Mark In

The position, in time, of the first frame to be used in a layer item.

See also: Mark Out

Mark Out

The position, in time, of the last frame to be used in a layer item.

See also: Mark In

MJPEG

JPEG is an acronym for Motion Joint Picture Experts Group. Video compression format which compresses each frame individually with a technique very similar to the JPEG bitmap format.

See also: MPEG

Mono (Audio)

A single audio channel. If you play back mono audio through stereo speakers, both speakers will play back the same sound.

See also: Stereo

MP3

Popular audio file format. Highly compressed - usually about 10% of the size of an equivalent WAV file.

See also: WAV

MPEG

Popular video compression format. MPEG 1 is highly compressed video format, suitable for producing VHS quality video. MPEG 2 is a higher quality format, as used by DVD players. MPEG uses a technique similar to JPEG compression on each frame, but also includes compression across frames by storing intermediate frames based on movement between the next and previous frames. MPEG achieves better compression than MJPEG (which only compresses each frame individually) but requires more processing power to create the MPEG files.

See also: MJPEG