Film crews sometimes consist of hundreds of people.
Film creation is a collaborative process that requires the work and input of an entire team. For every actor that you see on screen, there are numerous people behind the camera that put in hours of work for every minute of footage shot. There are numerous jobs in film development that are vital to getting a film to the screen.
Writer
Every film has to start with a script. While some films do begin development before a solid script is in place, a writer is usually one of the first people hired to put a story together that the development team can follow in planning what they need for the production. The writer will sometimes be hired to write a specific story, or the writer may write a script himself and then sell it to a studio or a production company. Once the film is in production, the writer is still often retained to work on set in case rewrites are needed.
Producer
The producer is the person responsible for putting together the production team while also arranging locations, equipment and other elements that the film shoot needs. The producer often acts as a general for the entire project and works with the director to ensure that the director has everything he needs to get the film shot as best as possible. The producer is also largely responsible in making sure the film stays on budget so the shoot doesn't run out of money before the film is finished. There are often many different producers working together on a single film.
Director
While the producer is the general of the entire film project as a whole, the director is the general of the film set itself. Everything is in place to ensure the director can realize his creative vision as best as possible. However, the director's job does not just begin on set. He is instrumental in the casting process, in choosing locations with the producer and in determining the overall tone of the film. The director is also as responsible as the producer for keeping the film on budget and is almost solely responsible for getting the film shot on schedule.
Set Designer
A film's sets are instrumental in establishing a visual style while also creating the world in which the film takes place. The set designer works closely with the director in building that world, and the set designer is in charge of the construction crews when sets need to be built. He also works with the location supervisor so he knows what sets need to be built and what sets can be done practically with buildings and locations that are already there.
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