Tracking

Can anybody suggest any tutorial for tracking increasing complicated objects. Masks that I creates are rotating and moving the way they shouldn't very often.

Start by turning off 3D track option. Try starting at end of clip and track backwards. Read the rotoscope method in manual.

if you have BCC's ofx, maybe try to use it's included Mocha tracker

All good advice above. A couple of good tricks:

1) sometimes for complex shapes, you need to use multiple windows and not just one, particularly for arms and faces (or arms and hands)

2) often, a combination of auto-tracking and manual tracking is necessary.

3) the harder you push the correction within the window, the easier it is to see the "seams" where the window begins and ends.

4) I sometimes have to track part way into the clip, then highlight the bad part of the track, delete the bad tracking, and do the rest of it manually. And that goes forwards or backwards.

It is possible to use a compositing tool like Mocha to create a tracking mask, then bring that into Resolve as an external matte and use that for color-correction instead. The advantage of using a window is that you can infinitely adjust the in & out softness; the advantage of using the mask is that the tracking and the shape is a lot more precise.