Yes, imagine i have a bench . In this bench I create a solid ( with camera tracker view) by selecting 3 or more points from the camera tracker.
this plane basically fit properly and keep in the place properly.
However if I create any object. The object itself does not respect this data and flies around the scene.
Besides, in another video I found the track stop in certain number of frames. Why this happen? Is the frame rate affecting this ? ( I have done these videos with a Samsung galaxy camera and the frame rate is really not usual).
Any object ( and by this I refer to any 3d layer) that is correctly positioned in 3d space taking the plane you have created as reference should work just fine.
As far as to why the track stops- not knowing the exact details about footage and project is hard to say. Try transcoding your footage to a different format, an uncompressed one, and track again.
I have been playing around with the camera tracker. Increasing the number of track features has improved my track so much .
Now it looks like my 3d elements parented with nulls works really well.
However, I am using Element from video copilot. This plugin uses a 2d layer ,and the 3d position parameters are inside of the plugin. Parenting in a normal way does not work anymore and the 3d element does not respect that track.
Create a plane/null with the track data - look at the position and rotation parameters. In the Element Effects Control panel open up the Group you have your object assigned to and position it matching the parameters in the plane/null.
1- Your track data generates a camera solve- that creates a camera that matches the real world camera. Do you have the exact details as far as lens type, distance and "film" size or are you just eye-balling it?
2- When you adjust the Element object position, are you adjusting the World position or using the controls under the Particle Replicator?
1- Unfortanely I am doing it by eye-balling it, because i dont have any detail from the camera.
2 - I tried with both and both poor result.
One thing I understood after loads of times, is that if i set my ground floor where exactly i want to place my element 3d , the track works well, however if i start to move the element to fit properly, the more i move , the more goes to hell.
Which gives me another headache, how can i put two elements???
You should create a Null by selecting the track points that correspond in the footage with the place where you want your 3d text to be.
In Element use the controls under the Particle Replicator to position the object. Once the position in matched, the only thing you need is to rotate and re-size, there should not be a need to move the position.
For the second text, choose other track points, generate a second Null and use that as a reference to place the second object in Element that should be assigned to a different Group.
Re: camera tracker issues by Shaun Myatt on Sep 3, 2012 at 5:28:23 am
i have this exact same issue, and to be honest Ive done all of the above as standard, yet my object still floats on the z plane, regardless of using the replicator x,y,z and using the null position figures in said mentioned particle replicator, ive also corrected my lens, I've entered the pixel pitch, sensor size, aspect ratio etc etc, my track is bang on, and in Boujou the test object is 100% solid, so i don't understand.
once both the corrected footage is in AE as well as the tracking cam data its meant to be just a case of creating an element layer via solid, and using the null (once un-picked) for the position data for the particle replicator, and then creating another null parented to the original nulls and camera to move the object, at least that's how Kramer does it..the weird thing is, it gets worse as the camera comes into the middle of the move ie when it starts its not really floating, as it starts moving faster, it starts floating faster, yet its working in the sense of x and y, this is a major problem as I've been trying now for 4 days