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workflow order / HVX200
Okay, this might not be the right forum but I figured I’d throw it out there anway.
I have some green screen footage shot with the HVX200 at 720 60P played back at 30 fps.
The resulting clip looks sped up due to the frame rate.
Now, I’m wondering if I should export the full res QT from Avid as is, and then slow them down, precomp them, and then key them in After Effects?
OR
Cut them down to half speed in Avid (creating a longer export time/ file size) then import them into AE and key them?
Does it matter in which order I apply these effects?
In the first workflow, I have to precomp all the clips being that you can not apply a timewarp effect and keylight to the same clip. Correct?
Any thoughts?
Thanks.
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6 Replies
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If you shot on the HVX at 60p and are playing back at half that, shouldn’t the footage look slower?
As for which workflow, I believe that After Effects has a more powerful time-manipulation system than Avid. In the newer version of AE you can actually use frame interpolation rather than flame blending when slowing footage down, which gives a much smoother appearance. AE also has several custom plugins for time manipulation, one of which I remember being called ‘Twixtor’.
If you’re looking to efficiently slow down footage and still be able to key, I would use AE for both steps. I’m not sure how Avid handles slow-mo in post, but I imagine you run the risk of getting blurred/blended edges between the green and your talent, which makes keying all that much more painful.
-Sean Emer
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Makes sense. Thanks.
And no, it is faster. You’re basically telling the camera to play back twice the amount of frames in the same amount of time. It’s still rolling at 30 fps even if you’re recording 60.
Now in post, you can slow it down to 30 fps or even 20 and get some decent slow motion footage.
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What are your settings in-camera?
I have an HVX200 as well, and in film-cam mode at 24PN, if I switch the framerate to 60, my playback is in slow motion, because the footage was recorded at 60 frames per seconds, but played back at 24. Can the HVX playback progressive footage interlaced? I don’t have much video experience with the HVX and interlaced footage, since I don’t use interlaced footage for any of my projects.
Sorry, I’m just curious as to what your setup was.
-Sean Emer
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720p, recording at 60 fps, played back at 30 fps.
I believe in 24pn, “n” being the key, that you can actually see the effect in-camera. In that mode, it actually gives each frame it’s 1/24 of a second (creating that slow motion in camera).
I don’t know if that makes any sense to you. I’m still pretty knew with my HVX as well, and am still getting my head around all of the various frame rates.
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I heard that in camera everything is recorded at 59.94 fps, and that play back skips frames accordingly. The N in PN, meaning Native, is supposed to make the actual recording at that chosen framerate (ie 24p = 60fps recorded, 24 fps chosen during playback and 24pn = 24 fps recorded), so yes thats probably why I see the slow-mo in camera. I’ve never recorded tests out of Native mode, since that mode gives you about twice as much room to record on.
I don’t want to squabble or anything, so I won’t press further, haha. Regardless, the HVX really is a great tool, isn’t it? It was def worth stepping up to from my old Canon XL1s, haha!
Happy filming!
-Sean Emer
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“I don’t want to squabble or anything, so I won’t press further, haha.”
No worries. I’m no expert.
It is a great tool. I too was operating an old XL1s before I bought my hvx. It’s great so far.
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