It worked immediately for me with the cam on the test bench and me sticking my ugly mug in front of each lens. Installed the cam and left both channels @ 5 fps.
The channel facing the street as an 8mm lens installed to narrow the view. The cam is detecting faces of people on motorcycles going 15mph even both riders in some cases. And at 5 fps, it's the first or second frame that they appear so turning the fps down absolutely solved my issue and I hope it solves yours.
Neat cam but a bit underpowered.