Even if you have a low solve error, shaking can still happen. I find this also a difficult matter.
- Add more markers!
- Try to find more distinct features in the scene to mark. Not all movies are suitable for marking.
- find / create a more stable video clip.
Good luck in finding a good solution.
Yes, you are right.
I will have to found another footage, this one is really too unstable.
Thanks for comment 