EN
The work presents these elements of movement which can be determined through the analysis of film shots. A picture of movement can be made on the basis of deformations of walls which limit a "cuboid" of a corn-field and of: 1 - wave front velocity caused by the work of a reel cutting bar →Vf and ←Vf 2 - displacement velocity of cut material → (+) Wₖ and → (-)Wₖ , 3 - "giroscope" vectorᶻ → F, 4 - moment Ωᴸ and angular velocity → ꞷ which accompany rotation about a fixed point, 5 - the way of the stalk which is placed at the edge of the auger as well as the way of its falling on a reaping unit, 6 - velocity of the mean value →z₁ of the displacement of the material in a gap. The work characterizes all these elements which decide about the strawy centre motion, and which could be estimated on the basis of film shots. The work also given an example of distributions of contact points in a grid. This example was obtained with an optical method.