Inserts a Bezier Track key at the given time in seconds. The track_idx must be the index of a Bezier Track.
in_handle is the left-side weight of the added Bezier curve point, out_handle is the right-side one, while value is the actual value at this point.
Inserts a Bezier Track key at the given time in seconds. The track_idx must be the index of a Bezier Track. in_handle is the left-side weight of the added Bezier curve point, out_handle is the right-side one, while value is the actual value at this point.