I've often wondered how they add the kind of effects that need computers (e.g. CGI), to films that were shot using analog film, for example 35mm (also of course IMAX, which is film by definition). Would they not have to first convert it to a digital format and edit like that? In which case, how would they preserve the film's quality while keeping the data rate at reasonable levels?
Also of course, how would they then convert it back to 35mm after editing it digitally (if I'm right about that)?
Thanks
There is what is call "digital mastering" and other techniques use in post production.
I think though you are asking about the process where the film is converted to a digital intermediate and that is edited. It is not a high quality digital copy, but a lot like the old "one light prints", used for viewing the dailies. Editing using these low density digital intermediate files use less processor time and thus can be edited at near real time. Both the film and digital intermediate have matching time codes, so once the intermediate has been edited to it final form, those time codes are then used to cut the original negative from which 35 mm theatrical releases are made. If theaters have a digital capacity, digital release made from the completed film can be produced.
Most all theatrical release type camera shooting is done with negative film. The projection print is a copy made after editing. The current trend in motion pictures is to scan the camera shot negative film and then perform the editing in computers, much like how video is done. Computers also makes conforming the multiple audio tracks simpler. This lowers the cost of editing significantly, even if SGI effects are not needed. Laser Pacific is Kodak's motion picture division that does the digital scanning and makes release prints. Film digital scanning is a lot higher than television resolution.
Answer by lare on 10 Jan 2010 11:39:29
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