Key challenges of chroma with areas of the screen no green images

Hi all

I have a small studio space, so when I have green screen, I always try to do shots I can't answer very well. The most recent example are these shots of my subject by behind. I move the camera more near the end of shooting.

As you can see in these images, I captured content beyond the borders of the green screen.

sylvie1.jpg

And I'm zooming, so before the end of shooting, it is looking like this:

sylvie2.jpg

No matter what I try (rotation of the pen, mask, Matt track tool) I can not understand how to deal with this photo. Roto pen doesn't let me keep green all about my topic. What I'm trying to expand the selection (roto border isn't clean - it is the cut in the edges all around):

sylvie3.jpg

.. .unhelpfully expands my selection completely to the edge of the screen. If I just disregard his right shoulder by millimeters, I get this:

sylvie4.jpg

This sequence is of course far from ideal, but I can't understand this. I spent hours trying different things without success.

All I'm trying to do is capture my subject with a bit of the green screen still around it, so I can remove that in a later step and have the images of the intact object with a transparent background.

If I'm following Matt up, the selected area becomes my background, instead of being always about me. It is a task in the form of subject from my background, lol.

Can anyone here feel sorry for this newb and guide me through what an expert can perform to process these images and crop the area of non-green screen images?

Thank you

Bill

Approach quite wrong. Before composing the images and inside the demo clip away anything outside the green screen using a mask base. Then try to extract a specific string based on the green (effects of use layers or the old base, Keylight not masking effects!) and refine the result using other effects, then apply it as a cache.

Mylenium

Tags: After Effects

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