Darby Edelen
Forum Replies Created
-
Okay then, back to the drawing board.
The built-in 3D Camera Tracker in AE doesn’t have as many ways to adjust the track/solve as other tools so you may be pretty much stuck. You might try specifying a field of view for the solve or masking out some portions of the frame if the tracks are bad there, but there’s not much else you can do.
Darby Edelen
-
[Evan Robinson] “The actor nor the green screen is moving”
You really shouldn’t need to track in that case. Ideally you would have information from the day of the shoot such as camera height, distance from subject and focal length. With those variables nailed down it shouldn’t be too hard to orient a virtual camera in such a way as to match the perspective in the shot.
If there’s no camera movement in the shot I’m not sure how any camera tracker would be able to produce a usable solve.
Darby Edelen
-
[Evan Robinson] “I am tracking the live footage.”
What does the live footage look like? How is the camera moving? Do you have tracker markers/parallax stands on a green screen? If your talent is moving in the shot, do you have them matted out from the tracking?
Darby Edelen
-
I’ll also add that as I looked closer at your footage it looks like there may be some Rolling Shutter or Lens Distortion issues, which could definitely throw off a track. I think it’s the former since I’m only seeing it in high motion areas.
Darby Edelen
-
Well, if you’re happy with the solve then the best advice I can give to try and help with orienting solids would be to try and get the best set up for your ground plane that you can manage.
Try using Set Origin on a track point on the ground with good Point Quality. Then select a pair of points that lie on the ground plane and use Set X or Set Z to try and orient the ground plane. This can be hit & miss but you should be able to get a decent ground plane if you use good quality points.
Once you have that set an orientation of 0° on all axes will align your solid with the ground plane null. You should either have a floor or a wall with that orientation. If it’s a wall then you should be able to rotate it 90° on one of its axes to make it a floor.
Darby Edelen
-
The clip looks okay. It looks very close to a nodal pan which changes the camera tracking because there is little to no parallax.
Without parallax the camera tracker may have a difficult time determining things like the camera’s focal length accurately. Take a look at your camera’s motion path in one of the Custom Views and see if it’s moving significantly. Were you standing still when you shot this? Do the camera’s keyframes make sense? Does the focal length assigned to the composition camera seem right?
If not then you might try re-tracking the scene with “Rotating Camera” selected for “Track Validation” in the Tracking section. When solving you should also choose “Rotation Only” in the Solve section.
Beyond that I’d recommend making sure that you’re not getting track points in the sky by creating a matte and setting your Matte Source in CameraTracker before tracking. The sky is too uniform to track reliably and too distant to really help in the camera solve.
Also if you know the focal length you used and film back for your camera then manually entering them may help get a better solve.
Darby Edelen
-
What resolution is your video? How is it encoded?
Darby Edelen
-
Your Null object has some unnecessary transformations that are causing problems with the fold.
Unparent the Corner layer from the Null temporarily. Now parent the Null to the Page layer. Make sure that ALL of the Orientation values on the Null are zero’d out except the Z orientation (the 3rd value).
Now also make sure that the Null is on the same plane as the Page layer by checking the position value of the Null. Set the Null’s Z-position value to 0, this will make the Null coplanar with the Page layer. If the Null is not coplanar with the Page then when you rotate it on its X-axis the Corner layer will rotate out away from the Page layer.
Get the X-axis set up properly by moving the Null in the X and Y only, and the orientation by adjusting the Z only, then parent the Corner layer to the Null again and try your rotation.
Darby Edelen
-
If you’re set on a diagonal rotation with a hard fold then the only option I’m aware of would be creating a 3D Null object and orienting it so that it’s X-axis (or one of its axes) lies along the fold.
Optionally ou could make this Null a child of the main (non-folding) page.
Parent the Folding portion of the page to the Null object and rotate the Null on it’s X-axis (or whichever axis you chose to place along the fold).
Darby Edelen
-
Tough to say exactly what would work for that image. If the keying effects aren’t doing it then you could try to create a matte using Color Correction > Channel Mixer set to Monochrome. For a mixed color like cyan you’d have to try and increase the blue and green contributions while reducing the red. Even then this may only get you part of the way since a lot of these colors do look fairly close.
Darby Edelen