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Dominic Digital
Dominic Digital
Participant
August 15, 2018
Question

Using 3d camera track like Up and Up music video

  • August 15, 2018
  • 1 reply
  • 357 views

Im making a scene and after using 3d camera track in after effect, I cant get the result I want.

When after creating 3d camera and null object, the footage I compose cant get the right position and it look like it is floating in the environment. It is not the goal I want because I want to compose that football field footage is attached with the surface on the cake but it look like it is floating and move out of the cake.

Here are the sample:

After that, I dont use 3d camera with null object anymore, I choose creating 3d camera and solid and I got better result, the solid is attached to the surface of the cake, however, when I try to replace the football field footage to that solid, my footage is rotated and got wrong position.

Here are the sample:

Therefore, I really need any recommend to help my personal project. Thank you so much.

    This topic has been closed for replies.

    1 reply

    Mylenium
    Mylenium
    Legend
    August 15, 2018

    Use another tracking software and/ or use proper procedures. Your camera appears to be auto-zooming during the motion to retain its focus and most tracking tools really do not like that. You need to work with a manual/ fixed zoom and then have something in your image to calibrate it to. AE's simplified 3D tracker can't handle this, so most likely you will have to use SynthEyes or something else plus set up the shot with proper markers, since the almost uniformly colored areas don't provide enough parallax, especially on a macro shot.

    Mylenium

    Dominic Digital
    Dominic DigitalAuthor
    Participant
    August 15, 2018

    i try synthEyes or Boujou but it still floating

    R
    Community Expert
    Rick GerardCommunity Expert
    Community Expert
    August 15, 2018

    The problem is poor technique. AE's camera tracker should be able to do a fairly decent job, you just have to learn how to use it properly. You can't just click and go. Go through the training you will find when you type Camera Track in the search help field at the top right corner of AE. Your solid sticks pretty well, you are just not putting the replacement layer in the same spot.

    The proper technique is to set an origin and ground plane, put a reference solid in the same spot, preferably add a grid to the solid to check the accuracy of the track and position, then add your replacement footage to the timeline, make it 3D, hold down the shift key and parent the replacement footage to the reference solid to snap it to the same position, Adjust rotation and scale only to fit it to the surface, then turn off the reference solid.

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