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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

Need Pal Frame Rates speed change clarification

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Sergio Perez

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Hi everyone,

I've just shot a trial motorsports event (in preparation for a big one) and am trying to figure the frame rate multiplication math I need to do with my footage.

We shot 5k 120 fps and 2k 300 FPS. Seeing that we did this, what would be, in terms of %, the speed change I would need to do in FCP to make it look like normal speed in a 25fps timeline? Can anyone share the math for this? Never been my forte ...

All help appreciated!
 
As far as I'm aware you would divide your shot frame rate with the output frame rate then times 100 for a percentage. I've not tried this, it could be wrong, but this is what I'd try.

i.e.
120/25 = 4.8 4.8*100 = 480%
300/25 = 12 12*100 = 1200%
 
Colin Bradburne said:
As far as I'm aware you would divide your shot frame rate with the output frame rate then times 100 for a percentage. I've not tried this, it could be wrong, but this is what I'd try.

i.e.
120/25 = 4.8 4.8*100 = 480%
300/25 = 12 12*100 = 1200%
Click to expand...

Thanks Colin, truly appreciated. Tried this and somehow everything looks faster than "normal" . Its somewhere close, the math should be close enough.

A tip to those shooting a motorsport event- Do not shoot everything at High Frame rates. Keep one or 2 shots in 25fps to keep one in perspectivo of how the "real look" is for ramping shots in post!
 
What happens if you drop it in an FCP X timeline of 25p or 25i, put the clip in the timeline, and go to the Retiming Button, and click on 'Conform Speed'? Does that help you?

I got some footage shot accidently in 25fps recorded frame rate, but on a 59.94 timecode base. So you got sped up footage, that looked like out of an old Buster Keaton-movie.
I put it in a 25p timeline, clicked the Conform Speed button, and poof... All was well. It slowed it down to 42 procent, and it looked great.
 
Mathieu, will definitely try your suggestion. Colin, seems like your math was spot on. We were so used to the slow motion that "real speed" just looked too fast to us!
 
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