A cue mark, also known as a cue dot, a cue blip, a changeover cue
[The term "changeover cue" can refer to any cue mark, or it can also refer to the second cue in a pair (the one that actually signals the changeover).] or simply a cue is a visual indicator used with
motion picture film
Film stock is an analog medium that is used for recording motion pictures or animation. It is recorded on by a movie camera, developed,
edited, and projected onto a screen using a movie projector. It is a strip or sheet of transparent pl ...
prints, usually placed in the upper right-hand corner of a filmframe.
[SMPTE 301M-1999. ''SMPTE STANDARD for Motion-Picture Film: Theater Projection Leader, Trailer and Cue Marks.'' Society of Motion Picture and Television Engineers. White Plains, NY.] Cue dots are also used as a visual form of signalling on television broadcasts.
A pair of cue marks is used to signal the projectionist that a particular reel of a movie is ending, as most movies presented on film come to theaters on several reels of film lasting about 14 to 20 minutes each (the positive print rolls, themselves, are either 1,000 feet or, more commonly, 2,000 feet, nominally 11.11 or 22.22 minutes, absolute maximum, with more commonly an editorial maximum of 9 to 10 or 18 to 20 minutes). The marks appear in the last seconds of each reel; the first mark, known as the motor cue, is placed about 8 seconds before the end of the picture section of the reel. The second mark, known as the changeover cue, is placed about 1 second before the end. Each mark lasts for precisely 4 frames (0.17 seconds).
Coded anti-piracy
Coded anti-piracy (CAP) is an anti-copyright infringement technology which marks each film print of a motion picture with a distinguishing pattern of dots, used as a forensic identifier to identify the source of illegal copies.
They are not to b ...
is a different kind of mark, used for
watermarking
A watermark is a recognizable image or pattern in paper used to determine authenticity.
Watermark or watermarking may also refer to:
Technology
* Digital watermarking, a technique to embed data in digital audio, images or video
** Audio water ...
to detect and prevent
copyright infringement
Copyright infringement (at times referred to as piracy) is the use of works protected by copyright without permission for a usage where such permission is required, thereby infringing certain exclusive rights granted to the copyright holder, s ...
.
Placement
The exact placement of cues varies somewhat from lab to lab.
According to SMPTE-301
(Theatre Projection Leader), there shall be 4 frames of motor cue, followed by 172 frames of picture, followed by 4 frames of changeover cue, followed by 18 frames of picture. That puts the motor cue at frames 198–195 from the end of the picture section of the reel (12.34 to 12.15 feet; or 12-foot-6-frames through 12-foot-3-frames), and the changeover cue at frames 21–19 from the end (1.31 to 1.18 feet; or 1-foot-5-frames through 1-foot-3-frames). As of January 2005, most domestic United States release prints follow this standard.
According to SMPTE-55
[SMPTE 55–2000. ''SMPTE STANDARD for Motion Picture Film: 35- and 16-mm Television Release Prints – Leaders and Cue Marks.'' Society of Motion Picture and Television Engineers. White Plains, NY.] (SMPTE Universal leader), there shall be 4 frames of motor cue, followed by 168 frames of picture, followed by 4 frames of changeover cue, followed by 24 frames of picture. That puts the motor cue at frames 200–197 (12.47 to 12.28 feet; or 12-foot-8-frames to 12-foot-5-frames) from the end of the picture section of the reel, and the changeover cue at frames 28–25 (1.75 to 1.56 feet; or 1-foot-12-frames to 1-foot-9-frames) from the end. Prior to January 2005, domestic United States release prints printed by Deluxe Laboratories (about half of domestic first-run major releases) followed this standard.
Appearance
Most cue marks appear as either a black circle (if the physical hole is punched out on the
negative used to make the projection print of the film), or a white circle (if the mark is made by punching a hole or scraping the
emulsion
An emulsion is a mixture of two or more liquids that are normally immiscible (unmixable or unblendable) owing to liquid-liquid phase separation. Emulsions are part of a more general class of two-phase systems of matter called colloids. Althoug ...
on the positive film print). They will also appear as an oval if the print is projected through an
anamorphic
Anamorphic format is the cinematography technique of shooting a widescreen picture on standard 35 mm film or other visual recording media with a non-widescreen native aspect ratio. It also refers to the projection format in which a distorted ...
lens.
In order to make these marks appear clearer to the projectionist, the punched film is most often "inked" after punching by application of
India ink, or a similar ink. The sample frames at the right have very fine inking. In the days of
three-strip Technicolor
Technicolor is a series of color motion picture processes, the first version dating back to 1916, and followed by improved versions over several decades.
Definitive Technicolor movies using three black and white films running through a special ...
, and successive exposure Technicolor cartoons, where separate silver images were available, it was not uncommon to apply two punches, one being larger and circular and the other being smaller and "serrated", with these being done in contrasting colors.
Use
Most
projection booths in
movie theater
A movie theater (American English), cinema (British English), or cinema hall ( Indian English), also known as a movie house, picture house, the movies, the pictures, picture theater, the silver screen, the big screen, or simply theater is a ...
s in the past (and in some older theaters and studio screening rooms today) were equipped with two
projectors
A projector or image projector is an optical device that projects an image (or moving images) onto a surface, commonly a projection screen. Most projectors create an image by shining a light through a small transparent lens, but some newer types ...
side-by-side to project reels of film alternating between the two projectors. The cue mark was originally designed for such a setup.
In such a system, the projectionist had a projector running the currently-playing reel (the outgoing projector) and a second incoming projector with the next reel to play, with each projector switching roles with each changeover. The projectionist would start the incoming projector with the changeover douser (shutter) closed as the first mark (the motor cue) appeared; the second projector would be threaded with the incoming reel parked 8 seconds (12 feet) of
countdown
A countdown is a sequence of backward counting to indicate the time remaining before an event is scheduled to occur. NASA commonly employs the terms "L-minus" and "T-minus" during the preparation for and anticipation of a rocket launch, and eve ...
ahead of the start of the picture section. The second mark (changeover cue) would alert the projectionist that the changeover was imminent, and one full second after the mark he would trigger a
solenoid
upright=1.20, An illustration of a solenoid
upright=1.20, Magnetic field created by a seven-loop solenoid (cross-sectional view) described using field lines
A solenoid () is a type of electromagnet formed by a helix, helical coil of wire whose ...
that would open the incoming projector and another solenoid that would close the outgoing projector. The audio would be switched at this time as well; the audio for a particular film frame appears 20 frames (about 15 inches) before the image, and so all film prints carry the first two to three feet of audio of the reel they precede at their tail, called a ''sound pullup'' (digital systems use different offsets before or after the image, which a computer corrects for). Film prints could be prepped by a projectionist with automatic changeover cues, which were small metallic appliqués which could be applied to a print at the first cue mark. Readers attached to the projector would read the marks and execute the changeover sequence automatically, as long as the incoming reel was threaded properly on the second projector.
However, most modern movie film projection systems have the film loaded on a very large horizontally-oriented platter (often colloquially known as a "cakestand"), in which all the reels of a movie are spliced together into one large contiguous wind of film filling the platter. Studios and preservation libraries that allow their archival or other rare prints to be exhibited typically demand that a twin projection system still be used so that their prints are not cut up for assembly.
Such newer platter-based projectors would eliminate the need for cue marks, but the marks are still present on modern-day motion picture projection prints, mainly for older theaters and studio screening rooms still using two-projector setups, and also to aid the projectionist in identifying reel ends during the splicing together of the reels onto a platter in newer theaters.
In past years, certainly up to the late 1960s, cue marks were applied to the composited camera original negative, but no longer. Cue marks are now applied to the printing internegative, only, and these marks appear to be black, because the mark is made on a negative image, suitable for release print making, only. However, for many films, particularly those for which
Academy
An academy ( Attic Greek: Ἀκαδήμεια; Koine Greek Ἀκαδημία) is an institution of secondary or tertiary higher learning (and generally also research or honorary membership). The name traces back to Plato's school of philosophy ...
consideration is anticipated, a special kind of film print, known variously as a "Showprint" (a trademark) or an "EK" (a generic name, after
Eastman Kodak
The Eastman Kodak Company (referred to simply as Kodak ) is an American public company that produces various products related to its historic basis in analogue photography. The company is headquartered in Rochester, New York, and is incorpor ...
), is indeed made directly from the composited camera original negative. In these cases, the cue marks are manually applied to the finished film prints, and these marks appear to be white, because the mark is made on a positive image suitable for direct projection. A typical print run of such "Showprints" or "EKs" might be about five prints, with one being intended for a Los Angeles engagement (required by the Academy for its consideration), possibly one for a New York engagement, possibly one for the producer, possibly one for the distributor, and one for archival purposes.
Other
Cue dots in television
In television, a similar idea is used to signal to a control room that a transition of some sort is about to occur on the broadcast (such as a
commercial break
A television advertisement (also called a television commercial, TV commercial, commercial, spot, television spot, TV spot, advert, television advert, TV advert, television ad, TV ad or simply an ad) is a span of television programming produce ...
). The most common type of television cue dot is the
IBA style, used only in the United Kingdom, which consists of a small square in the top right corner of the screen, with black and white moving stripes. The other is a proprietary system used principally by the
BBC #REDIRECT BBC #REDIRECT BBC #REDIRECT BBC
Here i going to introduce about the best teacher of my life b BALAJI sir. He is the precious gift that I got befor 2yrs . How has helped and thought all the concept and made my success in the 10th board ex ...
(who do not air commercials). This version is a static square in the top left corner with a white-black-white pattern.
In the early days of television, some stations used a puncher or a scriber on film prints. This was seldom accurate and not all stations used the same five second / one second pattern. Viewers were often treated to distortion just before station breaks in any film that had been around a while. Although the
Society of Motion Picture and Television Engineers
The Society of Motion Picture and Television Engineers (SMPTE) (, rarely ), founded in 1916 as the Society of Motion Picture Engineers or SMPE, is a global professional association of engineers, technologists, and executives working in the m ...
attempted to standardize television cues, its efforts went largely unheeded. The wide variety of telecine projectors (Eastman Kodak 250 on the high-end and RCA TP-16 on the low-end, for 16mm, and RCA TP-35 on the high-end and General Precision 35 on the low-end, for 35mm) significantly prevented any such standardization.
In the past few decades, the cue dot was used extensively on the
ITV
ITV or iTV may refer to:
ITV
*Independent Television (ITV), a British television network, consisting of:
** ITV (TV network), a free-to-air national commercial television network covering the United Kingdom, the Isle of Man, and the Channel Islan ...
and
Channel 4
Channel 4 is a British free-to-air public broadcast television network operated by the state-owned enterprise, state-owned Channel Four Television Corporation. It began its transmission on 2 November 1982 and was established to provide a four ...
television networks in the
United Kingdom
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and North ...
as a commercial break was approaching. This was for the benefit of the regional playout centres who would need to run commercials for their broadcast areas. Automation and playout servers led to this being phased out and it is now used only for some live presentations, especially those with regional opt-outs or variable ad breaks. The cue dot appears about 1 minute before the break and disappears 5 seconds before the break starts. ITV use a spinning black-and-white ticker in the corner of the screen. In recent years, ITV have reduced usage of the cue dot to sporting events and other live broadcast programmes.
The BBC's main purpose of cue dots was to cue the following programme, either from a studio or from an
outside broadcast
Outside broadcasting (OB) is the electronic field production (EFP) of television or radio programmes (typically to cover television news and sports television events) from a mobile remote broadcast television studio. Professional video camera ...
.
Improvements in talkback and
Presfax have made the BBC's usage of cue dots rare. The prevalence of digital television and the accompanying delays have made the use of cue dots to communicate with outside broadcast obsolete.
Cue dots do have some other uses: presentation may be asked to "flash your dots" by an outside broadcast unit to confirm that their off-air check feed is correct, particularly when working regionally. The dots are also used during coverage of the Wimbledon tennis championships to warn other broadcasters that the BBC feed will be cutting to an interview intended for the UK audience only, so they should be ready to go to something else.
See also
*
Coded anti-piracy
Coded anti-piracy (CAP) is an anti-copyright infringement technology which marks each film print of a motion picture with a distinguishing pattern of dots, used as a forensic identifier to identify the source of illegal copies.
They are not to b ...
, a different kind of mark used for watermarking
References
{{DEFAULTSORT:Cue Mark
Film and video technology
Film and video terminology
Television presentation
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