Camera Rotation Tracking

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Camera Rotation Tracking

Camera Rotation Tracking

Created by Harris_13
4 Months Ago
May 14, 2019 @ 23:11 am

Hello guys,

I have a clip with a person standing still and the camera turns around her 360. I want to add an object on her which is not rotating like she does but follows the camera movement so it looks like it is on her. Tried the trackers and mocha but couldn't manage. Any suggestions?

Thanks

martin_mocha
4 Months Ago
May 14, 2019 @ 23:19 am

Mocha would not be able to do this on a single camera-facing 2D plane, as a plane cannot rotate 360 degrees without turning the texture away from you.

What is the camera angle? If you can see the plane of the ground you could get a track and convert it to a 3d null instead.

What is the detail around the subject? Is it static, such as walls, trees etc or is it moving?

Harris_13
4 Months Ago
May 15, 2019 @ 7:12 pm

the person and the background are completely static. Because it was saught by hand, with no steady cam, i needed track it in order to ad an object on the lady
Harris_13
4 Months Ago
May 15, 2019 @ 8:18 pm

its a shot simila to the one in 0:42

Thanks

4 Months Ago
May 15, 2019 @ 15:28 am

In your version of the shot is the ground visible or is it a similar angle shot upwards against the sky?
Harris_13
4 Months Ago
May 16, 2019 @ 9:33 pm

The subject is visible from the waist up. You can see the ground in a distance. Here is a
Screenshot

Thanks

havardhv
4 Months Ago
May 16, 2019 @ 15:13 am

I haven’t done this myself, but I’ve seen people do it (in C4D or Blender I believe). They track the camera first, and then after that data is applied they track the moving object(s). That way the camera motion and the object motion will be correct.
havardhv
4 Months Ago
May 16, 2019 @ 15:15 am

But if the object is static you could probably get away with just tracking the camera
martin_mocha
4 Months Ago
May 16, 2019 @ 22:16 am

If that is the angle, you should be able to track multiple planes around the actor in Mocha Pro, solve the camera, then have the object placed in the scene.

You'll probably first need to mask out the actor as a foreground layer, then behind her on a new layer, try to track the ground in perspective with a largish layer. Depending on the speed of the rotation you may need to up the angle value in the tracking parameters.

Harris_13
4 Months Ago
May 17, 2019 @ 13:28 am

OK guys, thanks alot for your time
4 Months Ago
May 19, 2019 @ 18:38 am

Let us know how you go! Curious to see what the result is like and what method you used to get there in the end
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