Is this a 4x4 flipbook? I tried to play it without TFlow and I don’t understand what’s the motion supposed to be, it looks like a moving noise with some blending? It’s not a clear motion, maybe try to output your flowmap with more contrast and less details, just for generating motion vectors.
Could you share more about your use case and what you are trying to use this texture for?
It feels like there is two motion in your texture, one going fast in the back, and one going slower in the front, but TFlow is not great at detecting overlaying motions. You could try to isolate them to bake one or multiple flow maps.
