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Ricardo Spencer
Highspeed problem
on Dec 10, 2014 at 11:00:16 pm

Hi everybody,

I recently directed a music video, using a camera at 48fps and the song twice as fast on playback. While conformed to 24, the song matches the image sync. Ok.

But there was a second camera, which I shot at 60fps. So, in this case, when conformed to 24, it is still slow, for obvious reasons. I'd need it 20% faster.

What should I do to sync it? Is there a second conform? Change speed?

Thanks!

Ricardo



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Dave LaRonde
Re: Highspeed problem
on Dec 10, 2014 at 11:47:42 pm
Last Edited By Dave LaRonde on Dec 11, 2014 at 10:45:29 pm

Do you mean REAL 48 & 60 frames/sec on those cameras and cutting at REAL 24 fps in FCP?
Not 59.94 on that 60 FPS camera? Not 23.98/23.976 in FCP? It's important.

Let's assume you really DO mean 60 & 48, no fractional frame rates. If that's true, I have a neat trick for you. Perhaps two neat tricks.

First trick: grab a copy of Adobe After Effects. Import the 60 fps footage. Place it in a 24 fps AE comp. Render. The result: 24 fps footage that looks just fine... but it will be real-time motion, i.e. band playing fast. I suppose you could conform to 12 fps for a mild stop-motion sort of look with the band playing at the intended speed.

Second trick: put the 60 fps footage in a 48 fps After Effects comp, render, then conform to 24... but I don't know if it will make the nice, smooth slo-mo you seek. I haven't done the arithmetic on that one.

My advice on these After Effects tricks: do BOTH on a test clip. See which one works best for you. Then have at it for real.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Ricardo Spencer
Re: Highspeed problem
on Dec 10, 2014 at 11:55:15 pm

Thanks a lot, Dave!
I will let you know as soon as I get it.
Ricardo



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Ricardo Spencer
Re: Highspeed problem
on Dec 18, 2014 at 9:38:31 pm

Hi, Dave!
You were right. My files are 59,94 and 47,952.
Not the same neat trick? Which I really need the band playing slow synced on a real time music track.
Thanks a lot,
Ricardo



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Dave LaRonde
Re: Highspeed problem
on Dec 18, 2014 at 10:53:14 pm

Well, you have other things to worry about first.

First of all: DON'T CUT AT 24! F0RGET 24!
Cut at 23.976, or 23.98 in FCP-speak.

Next: get rid of the footage conformed to 24; re-conform it to 23.976.

The same tricks will still work, you can apply the same techniques, but you'll have to change the numbers for the frame rates:

60=59.94
48=47.952
24=23.976
12=11.988

...and in case you need it, 30=29.97

I once had a thick-skulled art director who didn't get fractional frame rates. He never understood that a frame rate is simply a measure of time. He kept seeing images of 0.976 frame in his head, as if someone has sliced off a tiny portion of the frame. He couldn't shake it.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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