Film-out is the process in the
computer graphics, videoand filmmakingdisciplines of transferring images or animationfrom videotapeor digital files to a traditional celluloidfilm print. Film-out is a broad term that encompasses the conversion of frame rates, color correction, as well as the actual printing, also called scanning or recording.
The film-out process is different depending on the regional standard of the master videotape in question -
NTSC, PALor SECAM- or likewise on the several emerging region-independent formats of high definition video (HD video); thus each type is covered separately, taking into account regional film-out industries, methods and technical considerations.
Film-out of live action video
Many documentaries and low budget films are shot on videotape or other
digital videomedia instead of film stock, and completed as digital video. Video productionmeans substantially lower costs than 16 mm or 35 mm film production on all levels. However, the relatively low cost of video ends when the issue of a theatrical presentation is raised, for which a print is required for film projection.
tandard definition (SD) video
Film-out of standard-definition video -- or any source that has an incompatible frame rate -- is the up-conversion of video media to film for theatrical viewing. The video to film conversion process consists of two major steps: first, the conversion of video into film frames which are then stored on a computer or on HD videotape, and secondly, the printing of these digital film frames onto physical 35 mm film. To understand these two steps, it is important to understand how video and film differ.
Film (sound film, at least) has remained unchanged for almost a century and creates the illusion of moving images through the rapid projection of still images, "frames", upon a screen, typically 24 per second. Video (traditional
interlacedSD video, anyway) has no real frame rate, (though the term "frame" is applied to video, it has a different meaning). Instead, video consists of a very fast succession of horizontal lines that continually cascade down the television screen - streaming top to bottom, before jumping back to the top and then streaming down to the bottom again, repeatedly, almost 60 alternating screen-fulls every second for NTSC, or exactly 50 such screen-fulls per second for PAL and SECAM. Since visual movement in video is infused in this continuous cascade of scans lines, there is no discrete image or real "frame" that can be identified at any one time. Therefore, when transferring video to film, it is necessary to "invent" individual film frames, 24 for every second in time. The bulk of the work done by a film-out company is this first step, creating film frames out of the stream of interlaced video.
Each company employs its own (often proprietary) technology for turning interlaced video into high resolution digital video files of 24 discrete images every second, called 24 progressive video or 24p. The technology must filter out all the visually unappealing artifacting that results from the inherent mismatch between video and film movement. Moreover, the conversion process usually requires human intervention at every edit point of a video program, so that each type of scene can be calibrated for maximum visual quality. The use of archival footage in video especially calls for extra attention.
Step two, the "scanning" to film, is the rote part of the process. This is the mechanical step where lasers "print" each of the newly created frames of the 24p video stored on computer files or HD videotape onto rolls of 35 mm film.
Most companies that do film-out, do all the stages of the process themselves for a lump sum. The job includes converting interlaced video into 24p and often a color correction session - (calibrating the image for theatrical projection), before scanning to physical film, (possibly followed by color correction of the film print made from the digital intermediary) - is offered. At the very least, film-out can be understood as the process of converting interlaced video to 24p and then scanning it to film.
NTSCis the most challenging of the formats when it comes to standards conversion and, specifically, converting to film prints. NTSC runs at the precise rate of 29.97 video "frames" (consisting of two interlaced screen-fulls of scan lines, called fields, per frame) per second. In this way, NTSC resolves actual live actionmovement at almost -- but not quite -- 60 alternating half-resolution images every second. Because of this 29.97 rate, no direct correlation to film frames at 24 frames per second can be achieved. NTSC is hardest to reconcile with film, thus motivates its own unique processes.
PAL and SECAM video
PALand SECAMrun at 25 interlaced video "frames" per second, which can be slowed down or frame-dropped, then deinterlaced, to correlate "frame" for frame with film running at 24 actual frames per second. PAL and SECAM are less complex and demanding than NTSC for film-out. PAL and SECAM conversions do agitate, though, with the unpleasant choice between slowing down video (and audio pitch, noticeably) by four percent from 25 to 24 frames per second in order to maintain a 1:1 frame match, slightly changing the rhythm and "feel" of the program; or maintaining original speed by periodically dropping frames, thereby creating jerkiness and possible loss of vital detail in fast moving action or precise edits.
High definition (HD) digital video
High definition digital video can be shot at a variety a frame rates, including 29.97
interlaced (like NTSC) or progressive; or 25 interlaced (like PAL) or progressive; or even 24 progressive (just like film). HD, if shot in 24 progressive, scans nearly perfectly to film without the need of a frame or field conversion process. Other issues remain though, based on the different resolutions, color spaces, and compression schemes that exist in the high-definition video world.
Film-out of computer graphics and animation
Artist working with CGI-
Computer-generated imagery Animation computers create pictures frame by frame. Once the finished product is done the frames are outputted, normally in a DPXfile. These picture data files can then be put on to filmusing a Film recorderfor Film out. SGI Computers started the high end CGI- Computer-generated imageryanimation stystems, but with faster computers and growth of Linuxbase systems many others are on the market now. Toy Story, and Tarzanare two samples of movies that were made in CGI and then Film-out. The most CGI work is done in 2k Display resolutionfiles (about the size of QXGA), but 4k Display resolutionis on the rise. A 2k movie requires a large- Terabyte Storage area network-SAN.
Computer graphics files are handled the same way but in single frames and may use
DPX, TIFFor other file formats.
Film-out of Digital intermediate
Film-out-recording is the last step of
Digital intermediatework flow. DPXfiles that were scanned on a Motion picture film scannerare stored on a Storage area network-SAN. The scanned DPX footage is edited and composited- FXon work stations then mastered back on film. Film restorationis also done this way.
Film-out of images for the graphic design and print industries
The days of
newspapersand magazinesshooting 35mm filmare almost gone. Digital cameras can now shoot all the images needed, storing them as files (e.g. JPEG, DPXor another format) that are readily edited prior to use. Once the final copy is approved it can be filmed out for publishing. Digital stills are not the only way to get pictures used in the graphic design and print industries. Film scanners and computer graphics programs are also common sources for graphic design and print industries.
Types of Film Out Devices
CRTrecorder. Camera and a special TVdisplay
Kinescope- early type
Electronic Video Recordingor EVR - early type
Electron Beam Film Recorder16 mm by 3M
* Laser film recorder, like
Kodak's high-end Lightning II recorder and Arri's Arrilaser.
DLPFilm recorder, like Cinevation's real-time Cinevator.
Lately it has become possible to transfer video images, including films scanned at high resolution, back to film stocks by making a
digital intermediate, which can then be recorded out to fine-grain film intermediate with a laser film printer. The first major live-action film to use this process entirely was " O Brother Where Art Thou", done by Kodak's Cinesite division in Hollywood in the spring of 2000. Prior to this, the video master was transferred from tape to film through one of several methods: CRT recorder, laser film printer, Kinescope, or electron beam recorder (EBR). Theater performances have been preserved with Kinescope for many years—the 1964 New York production of " Hamlet" with Richard Burton, for example, was shot on video and printed as a film that was released in movie theaters using this process. Fernando Arrabalwas the first to use the technique of video-to-film for aesthetic purposes, for the 1971 film " Viva la muerte", which used heavily color-adjusted video footage only for the fantasy sequences. [ [http://www.arrabal.org/emuert.html arrabal.org's compilation of reviews of the film " Viva la muerte"] .] Experimental filmmaker Scott Bartlettalso utilized video footage and effects for portions of his 1972 film " OffOn", by filming such with a 16 mm film camera off of a video monitor. Technicoloralso experimented in the early 1970s with using video gear & videotape to make feaure-length motion pictures with, by transferring the videotape to film for final release and distribution. Films made with this process were the 1973 film "Why", the 1971 film " The Resurrection of Zachary Wheeler", and the most famous film using this process, Frank Zappa's 1971 film " 200 Motels", which was originally shot on 2 inch Quadruplex videotape, and then transferred to film by Technicolor, being the first independent film originally to be shot on videotape and distributed theatrically in 35 mm.
Also, countless educational, medical, industrial, and promotional videotapes produced from the late 1950s up to the mid-1980s were also transferred to film stock (usually 16 mm film) for widespread distribution, using either an EBR or CRT recorder. This was done due to
VCRs and VTRs then not being commonplace in most schools, hospitals, boardrooms, and other institutional settings, due to their high cost and the multitudes of proprietary (and incompatible) open-reel, cartridge, & cassette videotape formats in the early years of industrial-market videotape recorders starting in the mid-to-late 1960s. But 16 mm projectors were widely available at the time in such settings, making distribution of such video productions on 16 mm film more practical. This was the case until the mid-1980s, when the VCR became affordable enough (and much more standardized in the form of VHSand Betamax) to be adopted in such institutional settings on a widespread basis. Digital videoequipment has made this approach easier; theatrical-release documentaries and features originated on video are now being produced this way. High Definition video became popular in the early 2000s by pioneering filmmakers like George Lucasand Robert Rodriguez, who used HD video cameras (such as the Sony HDW-F900) to capture images for popular movies like "Star Wars Episode 2: Attack of the Clones" and "Spy Kids 2", respectively, both released in 2002. Independent filmmakers, especially those participating in the Dogmemovement of filmmaking, have also shot their films on MiniDVvideotape, to be transferred to 35 mm film stock for theatrical release. Some examples of independent movies being shot on videotape are Lone Scherfig's " Italian For Beginners" (a Dogme film), Steven Soderbergh's " Full Frontal" (which was shot on PAL-standard MiniDV gear in the normally NTSC-prevalent US, due to its higher resolution of 625 lines and frame rate of 25 frame/s (as opposed to NTSC's 525 line resolution and 30 frame/s frame rate), more closely matching film's 24 frame/s), and Mike Figgis' "Timecode".
Hard disk recorder
* [http://www.efilm.com/ Efilm]
* [http://www.swisseffects.ch Swiss Effects]
* [http://www.filmout.com Filmout Express]
* [http://www.ascentmedia.com Ascent Media]
* [http://www.lasergraphics.com Motion picture film scanning and recording systems]
* [http://www.cinevation.net Cinevation]
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