Stock footage

Stock footage, and similarly, archive footage, library pictures, and file footage is film or video footage that can be used again in other films. Stock footage is beneficial to filmmakers as it saves shooting new material. A single piece of stock footage is called a "stock shot" or a "library shot". Stock footage may have appeared in previous productions but may also be outtakes, footage shot for previous productions and not used, or shot in order to be sold. Examples of stock footage that might be utilized are moving images of cities and landmarks, wildlife in their natural environments, and historical footage. Suppliers of stock footage may be either rights managed or royalty-free. Many websites offer direct downloads of clips in various formats.

Stock footage companies began to emerge in the mid-1980s, offering clips mastered on Betacam SP, VHS, and film formats. Many of the smaller libraries that specialized in niche topics such as extreme sports, technological or cultural collections were bought out by larger concerns such as Corbis or Getty Images over the next couple of decades.

Stock footage can be used to integrate news footage or notable figures into a film. For instance, the Academy Award-winning film Forrest Gump used stock footage extensively, modified with computer-generated imagery to portray the lead character meeting such historic figures such as John F. Kennedy, Richard Nixon, and John Lennon.

News programs use film footage from their libraries when more recent images are not available. Such usage is often labeled on-screen with an indication that the footage being shown is file footage.

Television and movies series also often recycle footage taken from previous installments. For instance, the Star Trek franchise kept a large collection of starships, planets, backgrounds, and explosions, which would appear on a regular basis throughout Star Trek's five series and ten films, being used with minimal alteration. That kept production costs down as models, mattes, and explosions were expensive to create. The advances in computer graphics in the late 1990s and early 2000s helped to significantly reduce the cost of Star Trek's production and allowed for a much wider variety of shots than previous model and painting-based visuals. Other films that re-used film footage from previous productions include Transformers: Dark of the Moon, Blade Runner, Star Wars: Episode II – Attack of the Clones, Hitman, Jaws: The Revenge, Halloween II, Harry Potter and the Order of the Phoenix, Harry Potter and the Deathly Hallows – Part 1 & 2 and Bill & Ted's Excellent Adventure.

Some series, particularly those made for children, such as Teletubbies, reuse footage that is shown in many episodes.^{[citation needed]} Meant for a young audience, the approach increases viewers' familiarity between shows. This introduces problems such as the requirement to, for example, wear the same clothing and inconsistency can sometimes become a problem. When cleverly filmed it is possible to avoid many of these problems.

Many broadcast shows use stock-footage clips as establishing shots of a particular city, which imply that the show is shot on location when in fact, it may be shot in a backlot studio. One or two establishing shots of an exotic location such as the Great Wall of China, Easter Island, or French Polynesia will save production companies the major costs of transporting crew and equipment to those actual locations.

Stock footage is often used in commercials when there is not enough money or time for production. More often than not these commercials are political or issue-oriented in nature. Sometimes it can be used to composite moving images that create the illusion of having on-camera performers appear to be on location. The term B-roll may refer to stock footage or newly shot scenes.