Suivi de camera 3d bug et track mon sujet au lieu de la scene

New Here ,
Aug 26, 2022 Aug 26, 2022

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Bonjour,
Je ne comprends pas pourquoi la caméra 3D ne veut pas tracker la scène, il capte le mouvement du sujet, mais pas la table, comment guider le traking ? 
Je bug sur ça depuis un moment, si vous pouvez m'aider, merci !

J'ai volontairement surexposé la scène ( car la scène de base est un peu sombre ) pour qu'il puisse bien tracké

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Community Expert , Aug 26, 2022 Aug 26, 2022

For the camera tracker to work, you need a significant amount of detail on more than one surface. There is not enough detail in the background or the table for the camera tracker to find anything. The shadow of the actor, the reflections of the actor on the table, and the actor all have edges and color differences that the Camera Tracker can find and tries to pick up. None of that movement represents the camera's movement.

 

The camera movement is a pan. There are no changes in parallax. A bette

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Community Expert ,
Aug 26, 2022 Aug 26, 2022

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For the camera tracker to work, you need a significant amount of detail on more than one surface. There is not enough detail in the background or the table for the camera tracker to find anything. The shadow of the actor, the reflections of the actor on the table, and the actor all have edges and color differences that the Camera Tracker can find and tries to pick up. None of that movement represents the camera's movement.

 

The camera movement is a pan. There are no changes in parallax. A better option would be to use Mocha AE, create a spline around both table legs and the two white objects on the table, track Translation only, then invert the tracking data and apply it to the shot. This will Motion Stabilize the shot and remove the camera movement. You can then complete your composite.

 

If you want to put the camera movement back in the shot, you can add a null to the composition, parent all layers to the null, uncheck invert tracking data in Mocha AE, and then apply the tracking data to the null.  

 

The camera movement will be back in the scene, all layers will be 2D, and the composite will look natural. 

 

I am almost ready to publish a series of tutorials on Mocha, and one of them demonstrates this workflow. You might also be able to find a tutorial on the Boris FX website under training that shows the workflow.

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New Here ,
Aug 26, 2022 Aug 26, 2022

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Merci beaucoup pour votre réactivité !

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