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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 24fps (full frames); NTSC video plays at 29.97fps (interlaced fields). When film is transferred to video, a process called 3:2 pulldown compensates for the difference in frame rates. In this way, one second of video plays back one second of film footage. (See the sidebar, "The Lowdown on Pulldown: 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. Removing pulldown ensures that your After Effects work will synchronize frames accurately at film's 24fps. By reducing the number of frames you have to process from 30fps to 24fps, you also decrease the amount of work you have to do, as well as the time required for rendering.


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