Wednesday, October 17, 2007
3:2 Pulldown
3:2 Pulldown is a common pulldown pattern. The word "pulldown" comes from the process of pulling down film to advance to the next frame. The 3:2 pulldown is when you change material with 24 frames to material with 29.97 frames. There's two steps to this process. The first is to slow down the material by 1/1.001. The change is so small that the audience doesn't notice, but it increases the number of frames to 23.976. The second step is done by first understanding that there are now four frames of film for every five frames of the NTSC video. The four frames are then changed into five.
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