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Johan5FB9
Known Participant
July 28, 2021
Question

Mix 24 fps and 60 fps in a 60 fps timeline

  • July 28, 2021
  • 2 replies
  • 6760 views

I don't want to change the speed.

 

Can I get the 24 fps clip to run smooth together with 60 fps clips?

 

Putting the 24 fps clip in a 60 fps timeline should be as smooth as putting it in a 24 fps timeline, or am I wrong? I mean monitors are having a refreash rate of 60 fps. So it should be pretty much the same?

This topic has been closed for replies.

2 replies

A
Andy 1968
Inspiring
August 1, 2021

I mix and match 60P, 30P,  24P and even interlaced video clips all the time. It looks fine even playing back in an interlaced sequence to broadcast complaint hardware in real-time. Most NLE can playback mixed frame rates in realtime and have done so for over ten years. I say give it a whirl and see what results you get. 

J
Johan5FB9Author
Known Participant
August 2, 2021

Ok I might give it a try thank you.

Graeme Bull
Community Expert
Graeme BullCommunity Expert
Community Expert
July 31, 2021

You can't. There are only 24 frames per second. You're putting it in a 60 frames per second timeline. Premiere has to find an extra 36 frames PER SECOND from somewhere to play the footage cleanly, essentially being forced to fill in with interpolated frames for 75% of the video clip. That's a tough job. There's "frame blending" in Premiere or you can try to bring that into AE to stretch it out to 60fps, but it's still going to look weird for sure. There are other options if you do a search on the internet that can possibly do a better job, but you're still having to fill in so much information.

J
Johan5FB9Author
Known Participant
July 31, 2021

Thank you for your comment.

 

24 fps is played back on a 60 hz screen most of the time. How is that different from putting a 24 fps in a 60 fps timeline?

 

I did search for more on this subject but I did not find anything. I did only find a lot information on putting a 60 fps in a 24 fps timeline. If there is more information please show me in the right direction.

 

Interpolated? Do you mean that software is trying to recreate missing frames? I don't think that is what is going on when you watch a movie recorded in 24 fps. My guess is that every frames just appear 2 or 3 times.

 

I can upload a 24 fps to youtube. Then I guess the viewers will stream/download in 24 fps and that viewers graphic cards will convert it to 60 fps.

 

But I just want to know what is the best way to do it in premiere so that I can combine 60 fps screen recording with 24 fps video camera recording.

Stan Jones
Community Expert
Stan JonesCommunity Expert
Community Expert
July 31, 2021

> 60 hz screen

 

That's not how it works. The refresh rate is how many times the monitor redraws the screen in a second. As long as it is the same or higher than the framerate, you're okay.

 

See this, for example:

https://www.avadirect.com/blog/frame-rate-fps-vs-hz-refresh-rate/

 

Your footage, sequence, export settings are dealing with framerates. Putting a 60fps source into a 24 fps timeline can be conformed by using actual frames. But putting the 24 fps source into a 60fps sequence requires that itnerpolated frames be created.

 

Stan

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