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JamMasterSam
Participating Frequently
September 20, 2018
Question

I need help mixing 23.976fps and 25fps footage!

  • September 20, 2018
  • 2 replies
  • 7739 views

Hi all,

I shot two workshops recently and stupidly shot the both in different frame rates. What makes it a bit tricker is the audio is also recorded to a Zoom H4N not into the camera.

I have already started working on the footage, just selecting the best vox pops and pulling out bits I like, but I am currently working on two sequences at once, one for the 23.976fps footage and one for the 25fps footage.

How on earth do I blend them and keep audio in sync? I'll need to put them both into a sequence but I don't know where to start. I have no preference on export settings, this will be hosted on YouTube most likely.

Please can someone save me here......!

Sam

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2 replies

Mike Dziennik
Community Expert
Mike DziennikCommunity Expert
Community Expert
September 21, 2018

Yes I mean 23.976. I always just call it that - I forget than some folk don't automatically convert that in their brain to 23.976 like I do.

Mike Dziennik
Community Expert
Mike DziennikCommunity Expert
Community Expert
September 20, 2018

You will need to experiment using the Time Interpolation options > Frame Blending & Optical Flow.

I suggest you master at 23.98. You usually get better results letting premiere drop frames from the 25 footage rather than forcing it to generate new frames in the 23.98.

You could interpret the footage to a different frame rate both directions but this will massively complicate your audio sync issues so probably not worth it.

J
JamMasterSamAuthor
Participating Frequently
September 20, 2018

Thanks for the answer. So I've reinterpreted my 25fps to 23.98fps. I've sped my audio track up to 107% and maintained pitch and it looks passable. What do you reckon? Does that sound ok?

juanmario
juanmario
Participating Frequently
September 21, 2018

JamMasterSam  escribió

So I've reinterpreted my 25fps to 23.98fps. I've sped my audio track up to 107% and maintained pitch and it looks passable. What do you reckon? Does that sound ok?

It does not sound good to me.

The calculation of speed is incorrect, 25 / 23,976 = 1,042709376042709 X 100 = 104,2709376042709.

If you use a CC version, what you would do is include the video of 25 fps in the sequence of 23,976, Premiere has to adjust the video automatically to the sequence without any problem.

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