Type of film transition in which one sequences fades over another
In the
post-production
process of
film
and
video editing
, a
dissolve
(sometimes called a
lap dissolve
) is a type of
film transition
in which one
sequence
fades over another. The terms
fade-out
(also called
fade to black
) and
fade-in
are used to describe a transition to and from a blank image. This is in contrast to a
cut
, where there is no such transition. A dissolve overlaps two
shots
for the duration of the effect, usually at the end of one scene and the beginning of the next, but may also be used in
montage
sequences. Generally, but not always, the use of a dissolve is held to indicate that a time has passed between the two scenes. Also, it may indicate a change of location or the start of a
flashback
.
Creation of effect
[
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]
In the
film
, this effect is usually created with an
optical printer
by controlling double exposure from frame to frame. In
linear video editing
or
live television
production, the same effect is created by interpolating the voltages of two synchronized
video
signals. In
non-linear video editing
, a dissolve is done using software, by interpolating gradually between the
RGB
values of each pixel of the image. The audio track optionally cross-fades between the soundtracks.
Cuts and dissolves are used differently. A camera cut changes the perspective from which a scene is portrayed. It is as if the viewer suddenly and instantly moved to a different place, and could see the scene from another angle.
Fades and dissolves typically have a duration of 1 to 2 seconds (24?48 frames), though this may vary according to the preference of the director and editor. Short dissolves (6?12 frames) may be used to soften obvious hard cuts which may startle the viewer, or
jump cuts
.
In narrative terms, the length of the dissolve is dictated by the mood or pacing the director or editor wishes to create. For instance, in the opening sequence of
Citizen Kane
, the dissolves between the
master shots
are slow because of the pervading sense of morbidity
Welles
and his collaborators wished to create. In the "News on the March" (montage) sequence shortly afterwards, however, the dissolves are much shorter as the intention is to create a sense of vitality in the life of the still mysterious lead character and speed in the (supposedly) newsreel sequence.
Dissolves are most common in classic cinema (see
continuity editing
), but are now less often used. The device began to fall into disuse as filmmakers fell under the influence of the
French New Wave
directors and their innovative use of the
jump cut
and as the absence of a linear narrative became more common. It is also sometimes held that the effect was best utilized in monochrome cinematography, where gradations of gray are mixed rather than possibly incompatible color tones. The impact of television news reporting may also have resulted in the device losing any pretense of having a contemporary feel.
Dissolves are usually kept to a minimum in most films and shows. Due mainly to stylistic tastes, it is very rare to see a shot which both begins and ends with a dissolve
See also
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]
References
[
edit
]
- Fielding, Raymond (1985).
The Technique of Special Effects Cinematography
. Focal Press. p. 152.
ISBN
0-240-51234-0
.
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Technique
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Timelapsing
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Other
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Storytelling
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Action
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Rule
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Term
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Editing
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