question about frame rate

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Level 1

8 points

question about frame rate

I three quarters of the way through an iMovie in 16:9 cinema with no theme but I inadvertently selected 24 fps when I created the project. I was wondering why it wasn't as smooth as some of the other movies I've done. Then I noticed this one was set to 24 fps. How can I change the frame rate to 30 fps? When I go into project properties, the frame rate is greyed out.

I have QuickTime Pro installed and can export the movie using QuickTime which allows me to choose a different frame rate (29.97). Would this work to smooth it out a bit or does it all have to be set in iMovie first? I'm not much of a video guy. Any help would be appreciated. Thanks!

27-Inch iMac 2.66GHz Intel Core i5-OTHER, Mac OS X (10.6.6), 8 GB RAM

Posted on Oct 26, 2011 3:17 PM

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Answer 1

Best reply

Karsten Schlüter

Level 7

34,086 points

Oct 26, 2011 11:54 PM in response to Gerard James

Gerard James wrote:

... can export the movie using QuickTime which allows me to choose a different frame rate (29.97). Would this work to smooth it out a bit ...

it will.

what it does, it 'spreads' the 24 frames onto 29.97 frames (per second) by generating 'inbetween' frames by simply blending them. this blend will be noticed as a 'smooth' impression.

although, it doesn't do wonders ... 😉

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Answer 2

Oct 27, 2011 12:47 AM in response to Gerard James

Hi

I think that You can use JES_Deinterlacer to convert frame rate to 29.97.

At least it works greaty from PAL (25fps) to NTSC (29.97) - and is free.

Yours Bengt W

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Answer 3

Gerard James Author

Level 1

8 points

Oct 27, 2011 9:33 AM in response to Karsten Schlüter

Thanks for the help. I'll experiment with QT a bit. I take it that the frame rate of an iMovie project can't be changed once it's been set?

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Answer 4

Gerard James Author

Level 1

8 points

Oct 27, 2011 9:34 AM in response to Bengt Wärleby

Thanks, I'll find JES_Deinterlacer!

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Answer 5

Oct 27, 2011 10:25 AM in response to Gerard James

Gerard James wrote:

...I take it that the frame rate of an iMovie project can't be changed once it's been set?

correct.

but upon Export using Quicktime in the many option you'e allowd to set 'any' frame rate.

as said. that does no magic - 24fps gets 'poured upon' 30fps or whatever ... it doesn'r add any non-existing frames, just blended ones.

sames does JES Deinterlacer, but it blends 'better' imho than the Quicktime enigine.-

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Answer 6

Gerard James Author

Level 1

8 points

Oct 27, 2011 11:13 AM in response to Karsten Schlüter

OK, great. Thanks so much for your help!

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Answer 7

Apr 5, 2014 8:09 PM in response to Karsten Schlüter

What evidence do you have that QT adds blended frames? Best I can tell is that it simply doubles some of them so as to achieve the specified frame rate. I never tried JES Deinterlacer, though. I probably should.

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