FBX import settings: any hidden am I missing?

[dsp_418]

I'm trying to change the frame per seconds when I import an FBX animation.

Odd enough, they always come as 30 fps animations even though they're 24 fps.

 

To change the animation to 24 fps I didn't find any solutions but scaling all the keyframes by hand to fill the Curve Editor. That's not working properly, as with tracked footage everything becomes messy.