The video is a technology
used to capture, recording,
processing, transmitting and
reproducing a sequence of
images representative of a
scene that is in motion. The
term, which comes from the
Latin "see", is currently
associated with different
storage formats, whether
analog (VHS and Betamax)
and digital (MPEG-4, DVD,
Quicktime, etc.).
Type of video
Analog
Analog technology records
waveforms as they are
Digital
Samples analog waveforms into a limited
set of numbers and records them.
Formats
AVI (.avi): Most commonly contains
M-JPEG,or DivX, but can contain nearly any
format
Quicktime: Most often
used for the locked
Apple Sorenson codec,
or for Cinepak (free), but
can also hold other
codecs such as mjpeg,
etc.
WMV (.wmv): More or less
MPEG4; can contain nearly
any codec, including several
Microsoft spinoffs of
MPEG-4
ASF ("Advanced Streaming
Format", .asf): a subset of
wmv, intended primarily
for streaming
Synthesis
Visual multimedia source that
combines a sequence of images
to form a moving picture. The
video transmits a signal to a
screen and processes the order
in which the screen captures
should be shown. Videos usually
have audio components that
correspond with the pictures
being shown on the screen.