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HD60 for Slow Motion
I have a camera that can shoot HD60, and i want to use it to do some slow motion things.
My question is:
If i import my 60fps footage into a 30fps composition, and i want to make the footage time 200%, how can i make sure that AE will use all the frames that were originally shot.
In other words, when i import 60fps footage into a 30fps comp, is it recalculation the footage into 30fps and disposing half the frames? how can i make sure that these frames are used (visible) if i do time stretch?
please help
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3 Replies
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If you import 60fps into a 30fps, the frames will get turned into fields. You will have 30 fps with 60 fields, 2 fields in each frame. Your eyes won’t see it though. that’s almost exactly what televisions show.
If you’re using timewarp with fields, you have to place it in double the footage fps comp so that timewarp can access both fields again.
If I were you, I would speed up the footage inside a 60fps comp then place it as a precomp in a 30fps. That way timewarp would work well and not be smeary.
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If you only need a 50% slow effect, you could simply interpret the 60fps as 30 fps, and it would playpack half the normal speed. This only works for down to around 30 fps because any lower, and you get jerky slow motion footage, and no one wants that.
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another option is to drag the footage into a 30fps comp and apply time stretch (layer>time>time stretch), enter 200%….
however, if you have several clips that you want to do this to, the fastest way is probably the interpret footage method that chris mentions…
select the footage in the project window, choose file>interpret footage>main, then change the frame rate from 60 to 30.
then, with that footage still selected, choose file>interpret footage>remember interpretation. select all the other pieces footage that you want change to 30fps and choose file>interpret footage>apply interpretation.
now they will all play in slo-mo at 30fps.
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW
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