Solved by ptrblck in post #4 
              
              
                The TF docs might be helpful: 

If  size[i]  is -1, all remaining elements in dimension i are included in the slice. In other words, this is equivalent to setting: 
size[i] = input_.dim_size(i) - begin[i] 

If you provide the input and desired output (+ shapes), we could try to come up with the corr…