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Duplicated frames, jerky motion
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Most of the film was shot on a Sony HVR-Z1U, including these problematic shots, I believe. While most of the film was shot in Cineframe 24, I believe these shots were recorded in regular 1080i60 in order to slow the shutter enough to get an image in low light. Maybe that’s bad info though, since this sounds like a Cineframe issue to you.
Zach
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Doing some research into the archives of different forums, I came across the following from Adam Wilt. So regardless of what solution you find, it will never be clean and will always include some frame blending.
Michael
Cutting to the chase: CF24 cherry-picks fields from the camera’s 60i video stream to simulate the juddery motion of 24p. However, the motion is worse (more uneven, more syncopated) than true 24p imagery, and it cannot be reverse-telecined to get smooth 24fps imagery. CF24 is fine as a special effect if you’re staying on video at 60i, but it’s not suitable for a true 24fps feel, nor will it work for film-outs: the motion is too unsmooth, and the vertical resolution of the image is damaged. For film-outs, shoot at 60i and use a program like DVFilm’s Maker or your film-out facility’s own in-house process to convert 60i to 24p.
Cineframe 24 appears to be mixing and matching a witches’ brew of field-doubled, frame-based, and synthesized images in its five frame cycle.
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I sent a sample using wetransfer.com. Thanks!
Zach
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got it. Will take a look at it later this afternoon when I get the time. Stay tuned.
Michael
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Can you send it my way too? comeback at mac dot com. I had to cut a pilot with footage shot in Cineframe and know it too damn well.
Shane
Little Frog Post
Read my blog, Little Frog in High Def -
I just sent you a clip, Shane. Thanks so much!
Zach
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Yup, that’s exactly what that is…60i shot in Cineframe where it basically shoots 30p…but with repeat frames. So it’s really 15fps. Trying to get this to look good in a 24p sequence…that’ll be rough. Twixtor and AE might be the only route with this footage.
When I had to deal with it my frame rate was 29.97, so it wasn’t too bad. Still looked stuttery, and we did chew out the “DP” who said “I thought you wanted the film look” without researching what that mode really looked like.
Shane
Little Frog Post
Read my blog, Little Frog in High Def -
Yes, 30p (29.97p) is about the worse scenario you can have going to 23.976p. For some stuff, you can remove the redundant frames, then play back the resulting frames at 23.976 which will change its speed, but offer the best image quality as nothing got blended.
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Thanks, Shane. I messed around with Twixtor a bit with no success. Any idea what settings might work?
Zach
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I’ll give that a try. Thanks, Michael.
Zach
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