Product behind a green screen with moving camera shots

[Chris Evans]

I would love to help you, but I just don’t quite understand everything you are trying to do. I get the product and the camera movement, but what kind of video green screen are you talking about? Do you have a piece of footage that you want to be a sphere? Do you have various piece of footage that you want to make a circle?

If you could include a picture, that might help.

Maybe someone else will understand better than me.

[Chris Brett]

— highly recommend 3D model for the pack shot if at all possible — in my experience much better and easier — probably more cost effective as well if you know a good 3D guy………

With regard to the background tend to do stuff like this by trial and error – build video wall / bend video wall / move camera etc etc but there will be a much better and technically accurate way of achieving this which I expect others will advise you on…………

———————-all the best——–chris–

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[Steven Probets]

Thanks guys, givine me food for thought!

I guess a simple, statement would be how would I go about getting a video that I keyed into a green screen background moving in tandem with the real object which was filmed with a camera orbiting it?

[Steven Probets]

It doesn’t have to be spherical and I’m thinking it shouldn’t be. Maybe a wall of video and when the object moves (or rotates) then the video wall would move to a focus onto another video (there will be 6 videos in a grid on one wall). Each video is shown at the same time as one feature is shown, then another feature – another video and so on.

The trick here, I guess, is to get the movement of the wall in relation to the camera to compliment the exact way the object moves (while it was being filmed).

So, how can we get a background move in the same way as the camera was when filming the object?

I’m thinking maybe I need to use the 3D camera tracker?

[Chris Evans]

3D camera tracker seems like exactly what you should use. The one that is build into After Effects does a pretty decent job. Shooting your product on a Green Screen turntable like Dave suggested. If you could also cover the turntable with some green cloth, put some track points on it and shoot wide enough so you can see the turntable, your 3d tracker would love you, just key out the BG, but not the turntable when you track it or you’ll confuse your tracker with stationary points.

[Steven Probets]

Thanks Chris, yes I think I am having this video pictured in my head finally. When the features are highlighted text will appear and I was thinking of using the text move with the product (a common effect nowadays).

Thanks Dave. Literally in the last 30 minutes this is why I’m scrapping the 3D spherical wall thing. Thanks to help on here and picturing the planes and visualising it in my head I don’t it is going to work.

[Chris Brett]

Hi Steven

——–dont forget you can build a high res video wall / use as a layer / add a curve / use a ‘wide angle lens’ on your AE camera / whatever …….. motion blurr …….

……….. and if you are using animated text as well you should be able to ‘get away’ with quite a lot — ie if its not technically correct it can still look convincing and pretty good in the edit .

—————————— chris

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[Walter Soyka]

I’ll suggest a different route than everyone else — consider doing the turntable moves in post.

Shoot one revolution on a motorized turntable with a slow and steady motor, then use time-remapping to alter the timing/speed. You can link this to camera rotation with a little simple math, eliminating the need to try to match motion. Alternately, shoot a pile of stills at regular rotation intervals.

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
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