Keyframe: A video frame for which the value of a particular
parameter of a video or audio effect is specified. During playback
the animation of effects is accomplished by adjusting parameters
smoothly from one key-framed value to the next. Animating effects
by means of keyframes is often called ‘keyframing’.
LPT: Parallel port
Luminance: Brightness
M1V: (File extension for) an MPEG file that contains video data
only. MPA, MPEG, MPG
Mbyte (also MB): One Mbyte (megabyte) corresponds to 1024
Kbytes – 1024 x 1024 bytes.
Mark In / Mark Out: In video editing, the mark in and mark out
times refer to the starting and ending timecodes that identify the
portions of clips to be included in the project.
MCI: Media Control Interface. Programming interface developed by
Microsoft recording and playing back audio and video data. It is also
used to connect a computer to an external video source such as a
VCR or laser disc.
Modulation: The encoding of information upon an empty carrier
signal.
Motion-JPEG (M-JPEG): A Video for Windows format,
specified by Microsoft, for encoding video sequences. JPEG
compression is used to compress each frame individually.
MPA: (File extension for) an MPEG file that contains audio data
only. M1V, MPEG, MPG
MPEG: Motion Picture Experts Group, and the standard developed
by them for the compression of moving images. Compared to M-
JPEG, it offers 75-80% data reduction with the same visual quality.
MPG: (File extension for) an MPEG file that contains both video
and audio data. M1V, MPEG, MPA
MPV: (File extension for) an MPEG file that contains video data
only. MPA, MPEG, MPG