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Old September 22nd, 2006, 03:11 PM   #1
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Best way to get slow motion for 1080/24P film?

Do you think it would be better to capture 720p60 and adjust the resolution, or to get 1080i60 and interpolate the 24P frames? The first option is a lot simpler, but I am not sure which one would yield the best results.
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Old September 22nd, 2006, 03:38 PM   #2
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The best way would be to shoot 1080/30p and adjust the frame rate of the clip. That'll give you full-resolution frame-accurate 1080 slow motion; it just won't be very slow is all.

Other than that, I haven't spent any time trying it but I'd guess you'd have more success with 720/60p rather than de-interlaced 1080/60i.
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Old September 23rd, 2006, 07:32 AM   #3
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Try a test both ways. Also try shooting 720 24pN at 60 fps
and uprez that to 1080 24p....
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Old September 23rd, 2006, 12:29 PM   #4
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I doubt I will have the luxury to test this shot, so I wanted to bank on your experience.
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Old September 23rd, 2006, 02:22 PM   #5
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Try testing ahead of time.....
Go outside and record some traffic or
a scene similiar to what you
will be recording....
I have been doing this 25 years
and I still test and experiment
all the time.
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Old February 16th, 2007, 06:45 AM   #6
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Re

Quote:
Originally Posted by Barry Green
The best way would be to shoot 1080/30p and adjust the frame rate of the clip. That'll give you full-resolution frame-accurate 1080 slow motion; it just won't be very slow is all.

Other than that, I haven't spent any time trying it but I'd guess you'd have more success with 720/60p rather than de-interlaced 1080/60i.
Barry, sorry for the newbie question, how you can adjust the frame rate of the clip?
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Old February 19th, 2007, 09:09 AM   #7
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just do it in NLE but setting the speed of clip, i think he ment it this way...
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Old February 20th, 2007, 03:05 PM   #8
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If you try to slow down too much in NLE (at least in FCP) you'll get ghosting as inbetween frames are "rendered." But maybe if you shoot 1080/60, you can then drop it in a 30fps timeline and get slowmo.

I've beend oing lots of slow-mo using 720p, 60fps/24p and it's come out beautifully, plus I can slow it down even more in post without worrying about the ghosting. I've gotten a 10 second shot up to a minute long without seeing the ghost renders, and that was with birds in flight. However, their wings move pretty fast, so if you don't need to catch such a fast moving object, you'll be fine doing it in post.
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Old February 20th, 2007, 04:18 PM   #9
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Shake it up

If you're on a Mac the best way is to use Shake to create your slow-motion effects. Unlike FCP which uses frame-blending which looks like staggered frames Shake instead uses "optical flow-based retiming" to create glass-smooth slo-mo. Check out the Shake demos on the Apple site and you'll see what I mean.

If you're on a PC I'm not sure which of the post-add ons would do the same thing as Shake.
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Old February 21st, 2007, 06:21 AM   #10
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After Effects 7 for one. Realviz retimer, or revisionfx twixtor (the people that started it all).
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