How can I transform 60 fps to 24 fps in Premiere Pro?

[David Baud]

Make sure to “Modify / Interpret footage…” from your bin window and not the timeline.

David Baud
Colorist & Finishing Editor
KOSMOS PRODUCTIONS
Denver – Paris
http://www.kosmos-productions.com

[Ryan Elder]

Okay thanks, but I tried that already, and it’s still grayed out.

[Ryan Elder]

Sorry I misunderstood, I see what you mean now. It worked, thanks!

[Ryan Elder]

However, after converting to 24 fps now, there seems to be jerks in the footage. Could this be from the conversion since 24 is not divisible by 60?

[Ryan Elder]

What I mean to be more specific, is that it looks like frames are missing after I export it.

[David Baud]

Ryan,

I am not sure what you are talking about. When Interpreting footage in PrP there is no export involved.
Please be more descriptive about your process and what you are trying to achieve.

Best,

David Baud
Colorist & Finishing Editor
KOSMOS PRODUCTIONS
Denver – Paris
http://www.kosmos-productions.com

[Jeff Pulera]

Rather than modifying the frame rate, try this – drop the unmodified 60p clip into a 24p timeline, and then apply 40% speed in timeline using Speed/Duration

Because 60 x .4 = 24

This should use every frame for playback = smooth slow-motion playback

I use 60p clips in 30p timeline (with 50% speed) and results are perfect every time. Should be no different for 60p to 24p (40%)

Thanks

Jeff Pulera
Safe Harbor Computers

[Ryan Elder]

Okay thanks, but why 40%? I want to get it as slow as I can, if possible.

As for exporting, what I mean is, is that when I export the scene into an H.264 video to send off to the other filmmakers to see how the scene plays out, it looks like frames are missing after the export.

[Jeff Pulera]

40% is as slow as you can go with 60p source into 24p sequence without duplicating frames. You can of course go slower if you want to, but then the motion becomes less smooth.

In my own example of shooting wedding footage at 60fps, I then edit in 30fps timeline. When I put the 60p clips into the 30p timeline, they play at “normal speed” by default – Premiere just skips every other frame during playback so we really only see 30 frames of the original 60 frames and the other 30 are unused/unseen.

Now, if I apply 50% slow to that same clip, that doubles the duration – a one-second clip becomes two seconds long. Two seconds at video playing at 30fps would requires 60 frames of video, right? Well, since my source clip is 60fps, at 50% speed Premiere still has enough frames available in that source clip to not duplicate any during playback, for silky-smooth slow-motion where every frame of source clip is played once. Hope that makes sense.

So if we put the 60fps clip into a 24fps sequence, we can then drop to 40% speed and get the same smooth result with every frame of source clip being played once. Because 60 x .40 = 24. The one-second of 60fps footage will play for 2.5 seconds at 40% speed and still show every original frame with no duplicates.

Back to 60p clip in 30p sequence, if I use 25% now every frame needs to be played TWICE to fill the new duration, then it is not as smooth. You’d get a similar result in 24p sequence at 20%.

There are options in Speed/Duration effect that tries to blend the frames in various ways to improve the smoothness of slow-motion, such as Frame Blending or Optical Flow. But of course do not use those options unless dropping below the speed threshold of playing each frame once.

Thanks

Jeff Pulera
Safe Harbor Computers

[Ryan Elder]

Okay thanks. I tried exporting the video again, and it looks better now as if the frames are not missing. Perhaps something went wrong with just the one export for some reason.