Overcranking the HPX-170 a-la Dexter credits?

evolvnyc

evolvnyc

Well-known member
I know there are a lot of posts about how to achieve different speeds with the HPX, I have a few variations on the "how to" question.

Is it possible (or is there a work-around or trick) do shoot overcranked in 1080?

I'm trying to have a super-slow moment in an otherwise normal timeline. I basically want to be able to pick a moment and have the action slow temporarily and then speed back up as in the opening sequence to Dexter here: http://www.youtube.com/watch?v=cgo57OBKFOA
(It's most noticeable at around 52 seconds when the speed changes on the coffee beans being ground)

Most of the "overcranked slow mo" footage I've seen posted has been jerky and I'm trying to get a totally smooth slow mo and transition, any tips/suggestions/tutorials? Is it possible that this was shot normally and just done in post?

I plan to shoot either hpx-170 in 24pn or the 5D Mark II and convert to 24fps a la philip bloom method using streamclip and cinema tools. Thanks.
 
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variable frame rates are only available in 720p modes. I've not heard of any way to make this happen in 1080. You may have to resort to a third part plugin and keyframe it in your NLE.
 
Do you mean shoot normally and just speed up or slow down in post? Does it give you the same ethereal quality as "overcranking?"
 
yes...i did mean you could do it in post. It will not be as good as over or undercranking with your camera, but since the 170 cannot shoot variable frame rates in 1080 mode, you don't have a choice. I don't know what NLE you use. I use FCP and in that you can use time remapping and set keyframes to speed up or slow down your footage over time or altogether. I have done that before and my experience is that slowing down footage that way looks better than speeding it up, especially if you are making small adjustments. There may be a third party program that works better than doing it in FCP (or whatever you use).
 
Ah, okay, I do use FCP and I have tried remapping and it never feels organic, so maybe the answer is to talk them into 720 and do an overcrank. Thanks!
 
Update to my last post...
I was just researching your original 1080 mode question further and, strangely enough, there is a way to simulate a few variable frame rates such as 1, 4, 8, 12 and 15 fps in 1080 by using the interval mode and certain slow shutter speeds. This is documented to some degree in Barry's HVX/HPX book on page 34. You still need to do some speedup in post to simulate it properly. Not sure about how you would achieve slo-mo in 1080 that way...I don't think it's possible. I haven't tried the simulation but maybe it's something you can check out.
 
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