24p to 24p overcrank slow motion in After Effects CS3. This tutorial is so easy it's ridiculous.

Please bestow a ♥ like or leave a ✉ comment if you have questions!

Fast-Action Slow Motion from 24p!
vimeo.com/11284811

☞ PLEASE NOTE: This tutorial will NOT teach you how to get SUPER slow motion out of your 24p footage. The slowest I push my 24p clips to is usually only 150% original speed. Any further, your footage will start to fall apart. This tutorial will give you more of the 30p to 24p 'dreamy' effect (i.e.: vimeo.com/10996788).

★Other Slow Motion Tutorials:★

vimeo.com/channels/aetuts

60p to 24p TRUE slow motion in Premiere (POPULAR): vimeo.com/8478419
60p to 24p SUPER slow motion in After Effects: vimeo.com/11280015
☞ Example: vimeo.com/11296764
30p to 24p OVERCRANKED slow motion in After Effects: vimeo.com/11281642
☞ Example: vimeo.com/11296318

So you shot in 24p and you want to slow it down a little. Here, you will learn a quick method to get some nice slow motion from your footage. Transform your 24p footage from your 7D, 5D Mark II (or what have you), and create a beautiful slow motion effect! This is accomplished using Frame Blending and Motion Blur inside of After Effects. Keep in mind this will likely cause aliasing and artifacts in your footage since AE will be 'guessing' every other frame. My footage in this tutorial isn't the best because it contains so much detail and distorts easily.

To calculate the "Stretch Factor" for After Effects (as in this tutorial), just multiply the ORIGINAL footage times 1.5, divided by your OUTPUT frame rate. For example:

ORIGINAL frame rate * 1.5 / OUTPUT * 100 = percentage of stretch. In this tutorial example,

23.976
times
1.5
divided by
23.976
equals
1.5

The quotient (1.5) is your stretch factor multiplied by 100 (two decimal places): 150% stretch factor.

Play around with different stretch factors (maybe up to 200%, 225% or 250%, depending on your footage). It is best to use whole numbers as mentioned. This way, After Effects can guess every other frame - not every 3 1/2 frames. The output tends to look better.

~----------------------------------------------------------------~
NTSC Scenario:
Project: 24p (23.976 fps)
Unedited footage: 24p (23.976 fps)
Desired output: 24p overcranked SLOW MOTION
Method: The method in the tutorial explains this scenario. (23.976 timeline, drop 24p footage in, set time stretch to 150%, export as 23.976 [24p])
~----------------------------------------------------------------~

Note: When I say 'forward slash for good quality' in the tutorial, I actually mean it will change the Frame Blending mode to Pixel Motion. Sorry for the confusion there.

Audio: Zoom H4n + Redhead Windscreen
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