how to crop video with camera effect [ffmpeg] -

i use code

crop=in_w/2:in_h/2:(in_w-out_w)/2+((in_w-out_w)/2)*sin(t*10):(in_h-out_h)/2 +((in_h-out_h)/2)*sin(t*13) 

but screen moves fast

this idea please me million thanks