Editing Slow motion (section)

{{Redirect|SloMo|other uses|SloMo (disambiguation)|and|Slow motion (disambiguation)}}
{{Short description|Effect in filmmaking}}
[[File:Ultra slow-motion video of glass tea cup smashed on concrete floor.webm|thumb|thumbtime=0:04|Slow motion video of a glass cup smashing on a concrete floor]]
'''Slow motion''' (commonly abbreviated as '''slow-mo''' or '''slo-mo''') is an effect in film-making whereby [[time]] appears to be [[Speed|slowed down]]. It was invented by the [[Austria]]n priest [[August Musger]] in the early 20th century. This can be accomplished through the use of [[high-speed cameras]] and then playing the footage produced by such cameras at a normal rate like 30 [[frames per second|fps]], or in post production through the use of software.

Typically this style is achieved when each [[film]] frame is captured at a [[framerate|rate]] much faster than it will be played back. When replayed at normal speed, time appears to be moving more slowly. A term for creating slow motion film is '''overcranking''' which refers to hand cranking an early camera at a faster rate than normal (i.e. faster than 24 frames per second). Slow motion can also be achieved by playing normally recorded footage at a slower speed. This technique is more often applied to video subjected to [[instant replay]] than to film. A third technique uses computer software post-processing to fabricate [[motion interpolation|digitally interpolated]] frames between the frames that were shot. Motion can be slowed further by combining techniques, such as for example by interpolating between overcranked frames. The traditional method for achieving super-slow motion is through [[high-speed photography]], a more sophisticated technique that uses specialized equipment to record fast phenomena, usually for [[#Scientific use|scientific applications]].

Slow motion is ubiquitous in modern filmmaking. It is used by a diverse range of directors to achieve diverse effects. Some classic subjects of slow-motion include:

* Athletic activities of all kinds, to demonstrate skill and style.
* To recapture a key moment in an athletic game, typically shown as a [[Instant replay|replay]].
* Natural phenomena, such as a drop of water hitting a glass.

Slow motion can also be used for artistic effect, to create a romantic or suspenseful aura or to stress a moment in time. [[Vsevolod Pudovkin]], for instance, used slow motion in a suicide scene in his 1933 film ''[[The Deserter (1933 film)|The Deserter]]'', in which a man jumping into a river seems sucked down by the slowly splashing waves. Another example is ''[[Face/Off]]'', in which [[John Woo]] used the same technique in the movements of a flock of flying [[pigeon]]s. ''[[The Matrix]]'' made a distinct success in applying the effect into action scenes through the use of multiple cameras, as well as mixing slow-motion with live action in other scenes.  Japanese [[Film Director|director]] [[Akira Kurosawa]] was a pioneer using this technique in his 1954 movie ''[[Seven Samurai]]''. American [[Film Director|director]] [[Sam Peckinpah]] was another classic lover of the use of slow motion. The technique is especially associated with [[explosion]] effect shots and underwater footage.{{Citation needed|date=May 2008}}

The opposite of slow motion is [[fast motion]]. [[Cinematographer]]s refer to fast motion as undercranking since it was originally achieved by cranking a handcranked camera slower than normal. It is often used for comic, or occasional stylistic effect. Extreme fast motion is known as [[time lapse photography]]; a frame of, say, a growing plant is taken every few hours; when the frames are played back at normal speed, the plant is seen to grow before the viewer's eyes.

The concept of slow motion may have existed before the invention of the motion picture: the [[Japan]]ese theatrical form [[Noh]] employs very slow movements.