Perfect track on Boujou, messed up on AE

#1

Hi

so i just tracked a sequence, where there’s two guys walking. Camera is standing still, filming them from the side. I then want to add something to the background.
The test object on Boujou is perfectly tracked to the background.

But when i export it to After Effects, the null objects aren’t tracked well to the footage!
Why’s that?

*Seems to be fine at the beggining (where the camera is pretty much still) but as soon as the camera starts to follow the two guys, the null objects are gliding with the cameras motion, almost as the framerate was wrong (though it is 25 fps on everything)

To give some more information, the camera in Boujou is far from the tracking points. Im pretty new to the whole thing with XYZ axis, so maybe it has something to do with that? Or the focal lenght?

Help please…

#2

Check the aspect ratio(non square vs square) and the sequence start frames, AE sometimes messes up starting with frame 1 instead of frame 0.

Andrew Kramer has a video tutorial for AE and boujou on his website, you might want to check that out.
http://www.videocopilot.net/tutorials/3d_crater_p1/

#3

No real idea, but did you properly calibrate your track by defining a reference unit/ axis? If the axes don’t align, the result would happen on the wrong plane, rotated around the world origin… The coordinates may simply have been normalized unfavorably to conform to world whereas for some reason your AE stuff is still in local coordinates. Something like that…

Mylenium

#4

Its a nodal pan shot, wich makes it harder to define it. Anyone know how to set p boujou for nodal panning shots?

#5

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.