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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

Stabilizing 4.5K footage for 4K timeline?

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Matt Hutchinson

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Hi,
We're coming to the end of shooting our first low budget feature on the R1Mx, and have to get a few guerilla style shots which will include leaning the camera on a shot bag on a car window (the car isn't moving). It should be pretty steady, but we'd like it to appear as a locked off shot.

We've been shooting 4K 2:1 and framing for 2.39:1, so would our best bet be shooting at 4.5K and using the extra resolution for stabilizing? Or would it be better to shoot the same as we have been, and use a slightly less rez image from 4k 2:1?

Any advice would be greatly appreciated :)

THANKS!
 
I would keep it at 2:1 you have more room to stabilize as far as canvas space. If you shoot at 4.5k its already 2.39:1 thus eliminating your vertical room north and south of the frame line to stabilize without reframing on the image a bit. Even with 2:1 you will have to reframe in some, but not as much as you would the other way around. That way you can keep your edges as close to what was shot. Someone correct me if I'm wrong here. Thats been my experience anyways.
 
Derek is right. Keeping it at 2:1 will give you the most image canvas to be able to stabilize later in post. Same reason Fincher shot at 5K and knocked it down 4K for post.
 
Fincher actually shot with a look around. All the framing was done with the final centercrop in mind, what they used custom guide lines for. I did that on my last musicvideo, and it worked out great. It had a lot of fast action an it was nice to have the headroom to all sides, for reframing and stabilizing. The nice thin if you shoot all your footage this way, is you don't get resoloution changes, by needing to scale the image up, and your framing doesn't get messed up.

Over here you can read, how I did it, especially the calculations:

http://www.reduser.net/forum/showthread.php?72098-2-40-1-Center-extraction&highlight=
 
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