3D Camera Tracker bug? Tracking points are holding still and not corresponding to the picture.

Did you solve the problem? I have the same one: https://community.adobe.com/t5/after-effects-bugs/3d-camera-tracker-does-not-work/idi-p/14255426

Actually I tried with footage which there're only camera movement without people moving around, and the 3D camera tracker still not working :v

Fair enough, but there's still nothing there to track. Your first shot only has the corner of the door as an actual feature, but otherwise only a blank wall and the situation is not different for the second shot, where in addition you would need to maks out the people so they are ignored by the tracker. And the third shot suffers the same problem: There may be enough features for once, but the actors are going to throw off everything without masking. 

Mylenium

The pattern doesn't change because there are no "adaptive" features. Again, this shot will never track in AE and even in Nuke or SSynthEyes there would be much more work required. You seem to have a wrong understanding how 3D tracking works, what it can do and what the prerequisites are. Your shot would require a ton of extra markers to even get a camera solve, let alone align everything if you have multiple takes to stitch together. There simply is no consistent 3D space there that would track at once. thisi s a shot where on a movie you'd use motion control/ recording the camera coordinates in conjunction with auxilairy tracking, but doing this purely based on a shot of someoen walking down the stairs would be a lot of work, including potentailly lots of manual adjustments. You might try with something simpler and more straightforward.

Mylenium

There is nothing to track. The walls are smooth as a baby's butt, they overlap and you are trying to track a long shot moving through a stair well. If at all you can track short segments, but overall this will never really work. This is something that requires other tools and much more preparation like placing markers, not starting zoomed in on a door's corner and reconstructing the scene fully in 3D. Again, this is perhaps something one might try in SsynthEyes or Nuke, but it's beyond AE's simple 3D tracker.

Mylenium