John + Abbey Wedding {Short Film}
A quick tutorial on converting your 60p video to 24p slow motion. This is referred to as “overcranking”. The method is very simple: slowing the footage down to 40% of its original speed. This creates a TRUE slowdown with no frame blending, motion estimation, or “creation” of frames.
0:00 – Slowing down 60p footage for 24p Slow Motion
1:31 – Slowing down multiple clips in ONE step!
Please bestow a ♥ like or leave a ✉ comment if you have questions!
UPDATE: Added 30p to 24p conversion method below (otherwise referred to as the ‘dreamy’ slo-mo effect). Also added some example links.
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To calculate the speed at which your footage should be at, just divide the OUTPUT frame rate by the ORIGINAL FOOTAGE frame rate. For example:
OUTPUT frame rate / ORIGINAL FOOTAGE = percentage of slowdown. In this tutorial example,
23.976
divided by
59.94
equals
0.40
The quotient (0.40) is your percentage (40%).
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NTSC Scenarios:
Project: 24p (23.976 fps)
Unedited footage: 60p (59.94 fps)
Desired output: 24p overcranked (slowmo)
Method: The method in the tutorial explains this scenario. (23.976 timeline, drop 60p footage in, set speed to 40%, export as 23.976 [24p])
Project: 24p (23.976 fps)
Unedited footage: 30p (29.97 fps)
Desired output: 24p overcranked (‘Dreamy’ slowmo)
Method: 23.976 timeline, drop 30p footage in, set speed to 80%, export as 23.976 (24p)
Project: 30p (29.97 fps)
Unedited footage: 60p (59.94 fps)
Desired output: 30p overcranked (slowmo)
Method: 29.97 timeline, drop 60p footage in, set speed to 50%, export as 29.97 (30p)
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PAL Scenarios:
Project: 25p (25.00 fps)
Unedited footage: 50p (50.00 fps)
Desired output: 25p overcranked (slowmo)
Method: 25.00 timeline, drop 50p footage in, set speed to 50%, export as 25.00 (25p)
Project: 25p (25.00 fps)
Unedited footage: 60p (59.94 fps)
Desired output: 25p overcranked (slowmo)
Method: 25.00 timeline, drop 60p footage in, set speed to 41.7%, export as 25.00 (25p)
Audio: Audacity + Zoom H4n + Redhead Windscreen
Michael
When Michael's not working on a client project, he's either taking photos, playing the piano, or woodworking. Currently the Owner at DeVowe Creative Works and volunteer firefighter in Medina, MN. If you find an article or post interesting, feel free to leave a comment – We would love to hear from you!
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