Frame Rate help

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Level 1

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Frame Rate help

I have a project that requires me to intercut video footage of a presentation with a Keynote deck. The video of the presentation was shot with a single camera (not by me) at 1920x1080 at 23.98 FPS. You can't see the Keynote slides on the projection screen behind the speaker, hence the need to intercut slides into the video.

I want to use FCP's multiclip to edit the Keynote slides (exported as a mov) and presentation video together.

I have the original Keynote file, but I can't seem to make the Keynote app export at 23.98 FPS. If I export it at 24 FPS, and try to make a multiclip, FCP throws an error about frame rates not matching (because the video footage is 23.98 FPS).

So, if I can't get Keynote to play nice, do I need to convert the presentation footage from 23.98 FPS to 24 FPS? If so, what's the best way to do it?

Thanks!

Posted on May 3, 2011 10:21 AM

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Answer 1

Jim Cookman

Level 7

23,447 points

May 3, 2011 10:36 AM in response to Hi-Hat

unless there is animation, just make jpegs or tiffs of the slides and cut them in. Totally bypasses all the framerate nonsense.

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Answer 2

Hi-Hat Author

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May 3, 2011 10:52 AM in response to Jim Cookman

Sadly, there are a couple "fancy" slide transitions that the speaker likes, and even mentioned during the presentation. I can't get rid of 'em.

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Answer 3

May 3, 2011 11:06 AM in response to Hi-Hat

You can probably use cinemtools to "conform" the footage from 24 to 23.98 or vice versa. Give it a shot.

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Answer 4

Hi-Hat Author

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May 3, 2011 11:19 AM in response to Michael Grenadier

The footage needs to be scaled to 720x405 for a webpage, so I'm going to try exporting it out of QT7 Pro and change the frame rate during the resize.

I looked briefly at the Cinema Tools manual yesterday afternoon, then my eyes glazed over and I decided not to dig into that unless absolutely necessary. I'm primarily a designer, not a video expert, so much of this is unknown territory for me. Thanks for the tip, though.

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Answer 5

May 3, 2011 11:25 AM in response to Hi-Hat

although cinema tools may seem daunting, using the conform option is very simple. First, I would duplicate your file (for safety sake as cinematools actually changes the frame rate of the original file). Then open your file in cinematools. File: open clip. A window opens and at the bottom about two-thirds to the right is a button "conform." Click that and a window opens called Conform Clip. Simply choose the desired frame rate and click the conform button. That's it. CinemaTools is (if I understand correctly) simply changing the metadata for the file so instead of playing back at your original frame rate, it plays back at the new frame rate. If you conform from 24fps to 23.98 you will actually be slowing down your clip slightly. But each frame is still a discrete frame and no interpolation, creation or deleting of frames happens.

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