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24 fps footage yet every 5th frame is a duplicate
Hi,
I have a planet earth sequence that came out of cinema 4D. The planet is a TIFF sequence. I also have a star field in the BG – also a TIFF sequence. There are also a number of flair layers.
Brought both the star field and planet into After effects, though there were some settings that were off at first. The comp was 23.976 instead of 24 and the subsequent nest some how ended up at 30 fps. Obviously my mistake for overlooking this at first. Problem was noticed when I scrubbed through or rendered out that every 3rd or 4th frame was a duplicate.
I then went in and changed or confirmed that all items and comps were set at 24 fps (comp settings and interpret footage). Problem is, now when I scrub through or render out every 5th frame is a duplicate. It’s like a pull-down issue, but again, everything was from a TIFF sequence, there was never any interlaced footage.
Any suggestions as to how I could rectify this would be greatly appreciated. This is starting to age me.
Cheers,
Dale -
15 Replies
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did you pre-render anything? and you might have overlooked something in a huge project such as that. every single comp has to be fixed, use a comp setter script and see where the bug is.
https://technicolorsoftware.hostzi.com/
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No, I did not pre-render. Also, tried a comp setter (though have to admit I don’t know much about them)but it did not change the situation.
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Could it have something to do with the fact that AE naturally interprets still sequences at 30 fps?
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Interesting, though that does seem an odd limitation or bug. From what I can recall, my past experience has been that 24fps plays out at 24fps.
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It’s a default.
Since a still sequence has no frame rate flag (unlike a video clip), AE has to pick something for it, and it picks 30. -
Yes, you are right. So any thoughts on how to deal with my predicament?
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Use Interpret footage to change the assumed frame rate of the footage.
Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog – What I’m thinking when my workstation’s thinking
Creative Cow Forum Host: Live & Stage Events -
Yes, I did Interpret footage to change the assumed frame rate of the footage. In fact I tried 30 fps, 24 fps, 23.98 and 23.976. When doing each of these I changed both the composition settings as well as interpret footage. Same problem every time – frame doubles every fifth frame.
I should point out though, I have several solid layers with flairs (sun and sun flairs) – all of these layers keep moving with the proper cadence (no 5th frame duplication).
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[Dale Hildebrand] “In fact I tried 30 fps, 24 fps, 23.98 and 23.976… Same problem every time – frame doubles every fifth frame.”
Are you sure the duplicated frames don’t exist in the footage? If all the comp frame rates in AE match the source footage consistently, AE shouldn’t be introducing any frame duplication.
Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog – What I’m thinking when my workstation’s thinking
Creative Cow Forum Host: Live & Stage Events -
Good question. The “Earth sequence” for example came out of cinema 4D where the project settings were 24fps. I exported a series of TIFFs from there, these TIFFs were in turn imported into AE. In AE as Steve pointed out, they were automatically imported at 30fps. I then interpreted to 23.976. Does the duplicate frame exist because of the original 30fps import, I don’t know. It’s not like interpret fixes the problem and I can’t see how pulldown removal would help for there is no upper and lower field – it’s just a series of stills.
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