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At its native 24 FPS rate, film could not be displayed on 60 Hz video without the necessary pulldown process, often leading to "judder": to convert 24 frames per second into 60 frames per second, every odd frame is repeated, playing twice, while every even frame is tripled. This creates uneven motion, appearing stroboscopic.
Short film, projected at 24 & 60 fps after RealD TrueMotion processing [20] [21] 2017 Sleep Has Her House: Scott Barley: English, No dialogue 60 Shot on iPhone 6 Plus digital video at 60 fps, and converted to 24 fps for projection. Blu-ray rendered at 24 fps. [22] 2018 Aquarela: Victor Kossakovsky: Russian, English, Spanish 96 Documentary ...
Note that with 23.976 fps time code, the "second" counter is still increased after 24 frames, even though 24 frames add up to slightly more than a real second. When working with other time sources, confusion can arise since a "second" in 23.976 fps time code notation is slightly longer than a real second, it is 1.001 (24 × 1 / (24000 / 1001 ...
To convert 24 frame/s film to 29.97 frame/s (presented as 59.94 interlaced fields per second) NTSC, a process called "3:2 pulldown" is used, in which every other film frame is duplicated across an additional interlaced field to achieve a framerate of 23.976 (the audio is slowed imperceptibly from the 24 frame/s source to match). This produces ...
The TV can natively display 240 frames per second, and perform advanced motion interpolation which inserts between 2 and 8 new frames between existing ones (for content running at 60 FPS to 24 FPS, respectively). For active 3D, this framerate would be halved.
However, to match 50 field interlaced PAL/SECAM or 59.94/60 field interlaced NTSC signal, frame rate conversion is necessary using various "pulldown" techniques. Most advanced TV sets can restore the original 24 frame/s signal using an inverse telecine process. Another option is to speed up 24-frame film by 4% (to 25 frames/s) for PAL/SECAM ...
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Filmmakers may originate their projects at 120, 240 or 300 fps so that it may be evenly pulled down to various multiple differing frame rates for distribution, such as 25, 30, 50, and 60 fps for video and 24, 48 or 60 fps for cinematic theater. The same is also done when creating slow motion sequences and is sometimes referred to as "overcranking."