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Film 3:2 Pulldown

Film transferred to video presents special challenges in post-production. One of the most common issues arises from the difference in frame rates: Film plays at 24 fps (full frames); NTSC video plays at about 29.97 fps (interlaced fields). When film is transferred to video, a process called 3:2 pulldown compensates for the difference in frame rates. In this process, one second of video plays back one second of film footage. (See the sidebar “The Lowdown on 3:2 Pulldown,” later in this chapter.)

However, if your final output is destined for film, you should remove 3:2 pulldown from video footage to ensure that your After Effects work will synchronize frames accurately at film's 24 fps. By reducing the number of frames you have to process from 30 fps to 24 fps, you also decrease your work and the time required for rendering.


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