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## How to calculate scale adjustment to match a background push or pull?

New Here ,
Aug 25, 2020

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In case that headline isn't clear, here's the situation:

I have a subject that was shot on green screen.  She's standing looking up at the sky.

I have a drone shot of a field that starts low to the ground and pulls to about 150 ft up.

I want to place her in the field and scale her down so that as the drone pulls up and away she appears to get proportionally smaller.  I've tried eyeballing it but it doesn't feel exactly real.

Is there an equation to calculate the amount I should reduce her scale, or where I should place keyframes over the duration of the shot, relative to the speed and height of the drone shot?

And since I'm not great at math, might there even be an easier hack for this?

Would this be better done in AE and if so how?

Thanks!

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Editing, How to

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## How to calculate scale adjustment to match a background push or pull?

New Here ,
Aug 25, 2020

Copied

In case that headline isn't clear, here's the situation:

I have a subject that was shot on green screen.  She's standing looking up at the sky.

I have a drone shot of a field that starts low to the ground and pulls to about 150 ft up.

I want to place her in the field and scale her down so that as the drone pulls up and away she appears to get proportionally smaller.  I've tried eyeballing it but it doesn't feel exactly real.

Is there an equation to calculate the amount I should reduce her scale, or where I should place keyframes over the duration of the shot, relative to the speed and height of the drone shot?

And since I'm not great at math, might there even be an easier hack for this?

Would this be better done in AE and if so how?

Thanks!

TOPICS
Editing, How to

Views

43

Likes

Report

Report
Community Guidelines
Be kind and respectful, give credit to the original source of content, and search for duplicates before posting. Learn more
Aug 25, 2020 0
2 Replies 2
Aug 25, 2020

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definitely AE, but I'm not an expert so I can't tell you how to do it.  I think you track something in the image and then there's a way to "attach" something to the track.  Maybe if I have a few drinks, I'll remember.   doubtful, but possible.  Might try posting your question in the ae forum...

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