Changing frame rate issues

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Level 1

6 points

Changing frame rate issues

Hi - I have a feature document that has just failed Apple's technical quality test, for submission to major platforms.

It failed on several counts, but the one I'm concerned with here is on some drone footage, which I inadvertently shot on 29.97 fps. I converted this to 25fps in FCPX, but this is unacceptable as that process drops frames. The dropped frames showed up on the QCR.

Reshooting or replacing the footage is out of the question.

Any suggestions to get around this?

THANKS!

MacBook Pro 15″, macOS 10.15

Posted on May 21, 2021 8:02 AM

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Answer 1

Top-ranking reply

Matti Haveri

Level 6

19,706 points

May 21, 2021 12:09 PM in response to busterbboy

Can't you just put that 29.97 fps clip to a 25 fps project and adjust its speed to "Auto" which plays every frame but increases the clip length multiplied by about (30/1.001)/25 so 10 sec becomes about 11 sec 24 frames at 25 fps with no dropped frames (set audio to "Preserve pitch" if there is any relevant audio in the original drone footage).

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Answer 2

Tom Wolsky

Level 10

152,779 points

May 21, 2021 9:57 AM in response to busterbboy

In the project did you use Frame sampling set to Optical Flow and see if that improves it. You could also try converting the drone footage using Compressor.

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Answer 3

Tom Wolsky

Level 10

152,779 points

May 21, 2021 10:45 AM in response to busterbboy

You'd have to batch process the originals. I'm not it will make a difference if the optical flow doesn't work.

There's a separate optical flow for rate conform when you're doing speed changes.

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Answer 4

busterbboy Author

Level 1

6 points

May 21, 2021 10:42 AM in response to Tom Wolsky

Thanks for that Tom.

I tried that technique with optical flow (which I thought only worked with speed-adjusted clips) and it seems okay to me - but then I thought it looked okay before! It's a very harsh scrutiny for the technical assessment.

Anyway, it's suck it and see, hopefully this has worked.

If not, I'll try Compressor. How would that work with just a few clips?

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