3D camera track issue

[kavinb70147053]

I just tracked some footage but I see very few track points, when I view the 2d source points it looks perfectly normal, iv never had this kind of issue before.... is there a way to create a camera +null using the 2d source points or fix the issue with the 3d solve??

[Roei Tzoref · Accepted solution]

guess Ae can't make the 3d coordinates because not enough camera perspective information. if there isn't enough your solve won't work. can we see the shot? unfortunately you can't manually create 3d points from 2d points - this happens automatically. if you need more control, you can use Syntheyes that does this. you can also add 2d track points to get a better solve. but even with syntheyes, if there isn't enough perspective information, you won't get a camera solve.

[Roei Tzoref]

games are hardly a decent candidate for tracking. the perspective you see is usually distorted (the geometry is synthesized and not real), in addition in your case you got foreground overlays on your footage that will mislead the tracking. and it's very dark and fast. if you had a decent camera move with no overlays and good exposure you might be able to pull through but too many things here that's throwing off the track.

[Rick Gerard]

What Roei said was 100% accurate. The 3D world in games often uses isometric cameras which do not produce the kind of parallax that is required to calculate camera movement. The textures on solid objects are not always compatible with detail analysis either. Add to this that there is often lots of other movement going on in the frame and you have a perfect storm of data that will foul up a camera track. Unfortunately, this applies to all camera tracking software I have ever used because they are all trying to solve for a real camera, not a virtual one that does not follow optical principals.

[Mylenium]

What the man said. Judging from the screenshot, there doesn't seem to be enough parallax or else the markers wouldn't cluster up so much only in a few places.

Mylenium