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What pulldown is used for 18 fps to video?


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#1 Eric Fandrich

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Posted 30 September 2006 - 10:44 AM

I have seen a lot of discussion related to how to get from 24 fps film to video and back (interlaced or progressive) and various pulldown schemes. What I have not seen very much of is what people do for Regular-8 or Super-8 film shot at 18 fps.

How do I get from S-8 shot at 18 fps to 720 24p or 30p for example?

Can anybody give me the lowdown?
Is there a resource covering this information that you can recommend?

Thanks!
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#2 Bryan Darling

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Posted 30 September 2006 - 03:38 PM

My question would be for what purpose do you want to know? Just general curiosity or do you have some specific issue or purpose? I use a program to convert Super 8 film to 18fps playing speed within the context of NTSC 29.97fps.

The pulldown scheme is 4:3:3 for interlacing, meaning frames of film overlap fields of video. (A) frames to (4) fields of video, (B) frames to (3) fields of video, and © frames to (3) fields of video.

If I want progressive, meaning no frames of film overlapping fields of video, it is 4:4:2. (A) frames to (4) fields of video, (B) frames to (4) fields of video, © frames to 2 fields of video.

It would be different all together if I wanted to set it up for 23.976 fps editing. It would be 2:3:3 for interlaced and 2:4:4 for progressive.
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