Although not the first to employ editing in film, the likes
of Sergei Eisenstein and Lev Kuleshov formulated techniques and theories,
raising the editing process to an art form.
Eisenstein believed that editing could be
used for more than just expounding a scene or moment, through a
"linkage" of related images. Eisenstein felt the "collision"
of shots could be used to manipulate the emotions of the audience and create
film metaphors. He believed that an idea should be derived from the
juxtaposition of two independent shots, bringing an element of collage into
film. He developed what he called "methods of montage"
https://en.wikipedia.org/wiki/Sergei_Eisenstein#Film_theorist
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Eisenstein formulated his Methods of Montage, detailing several principles of film editing.
Sergei
Eisenstein – Methods of Montage
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Metric
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Shots
are of equal length (number of frames)
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Rhythmic
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Shot
length is dictated by visual elements such as movement and composition.
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Tonal
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Transitions
are employed to illicit a specific emotional response from the audience.
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Overtonal
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Overtonal
montage may utilise metric, rhythmic and tonal techniques.
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Intellectual
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Presents
and conveys intellectual ideas through juxtaposition, symbolism and metaphor.
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Lev Kuleshov famously studied the effects of juxtaposition in film editing.
In the
dawn of the 20th century, cinema was a new art form, comprising many
techniques that hadn’t been developed. And the ones that had had not been
studied to the needed extension. The elements of editing were among them.
Filmmakers knew that you could cut and splice the film strip, but they
didn’t thoroughly comprehend the purposes of doing so.
Lev
Kuleshov, a Soviet filmmaker, was among the first to dissect the effects
of juxtaposition. Through his experiments and research, Kuleshov
discovered that depending on how shots are assembled the audience will attach
a specific meaning or emotion to it.
In his
experiment, Kuleshov cut an actor with shots of three different subjects: a hot plate of soup, a girl in a coffin and a pretty woman lying in a couch.
The footage of the actor was the same expressionless gaze. Yet the audience
raved his performance, saying first he looked hungry, then sad, then lustful.
www.elementsofcinema.com/editing/kuleshov-effect.html
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http://haverholm.com/wp-content/uploads/2015/07/Kuleshov.jpg
Film and sound editor Walter Murch discusses the art of
film editing in his book, In the Blink of
an Eye (Silman-James Press, 1995). The theme of the book lies around the
process of editing, why it should work and its acceptance by the viewing
audience.
Murch proposes six guiding considerations for editing in
film. Although referred to as “the Rule of Six”, they are designed to inform
the process rather than be a rigid reference. Correctness and consistency are
dependent upon the required effect, the response we wish to elicit from the
viewer.
Walter
Murch – The Rule of Six
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Emotion
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Is it
true to the emotion that we want to portray, that we want to provoke in the
audience? Does it push forward the emotional line?
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Story
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Does it
advance the story? Does it tell the story in way that can be understood by
the audience?
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Rhythm
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Does
the cut happen at the “right” point? Does it feel correct and interesting?
Does it fit in the overall and established rhythm?
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Eye
Trace
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Where
is the audience looking during the shot? Is the eye carried smoothly during
the transition?
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2D
Plane
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The
representation of the 3D space on a 2D plane (the screen). Questions of
“stage line” (the 180 degree rule) and composition
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3D
Space
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The
positioning of actors and objects in the 3D space. Are they represented
coherently and consistently?
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Murch,
Walter, In the Blink of an Eye, Silman-James Press, 1995
Where Murch is more firm is in the primacy of each rule
over those that follow. While all six conditions may be met in most
circumstances, where, perhaps for practical reasons, any must necessarily be excluded,
the priority is to maintain emotion over story, story over rhythm and so on.