Smooth Zoom for Video

Hello, do anyone know where to change the parameter for smoother zoom on video camera mode.
Now If I zoom in and out, it goes from 1.0x, 1.1x, 1.2x, 1.3x .......... 3.0x. Can we change it to 1.0x, 1.05x, 1.1x, 1.15x, ....
My divice Galaxy S5 Verizon Official OD5 rooted.

Thx