The Vector Viewer node displays motion analysis data as motion vectors. You can view forward and backward motion vectors, and customize the colour and size of the vectors to make them easier to view. The arrow length displays displacement, and the size of the arrowhead indicates the relative speed of the motion.

The front tab accepts integer and floating-point clips. The back and matte tabs support floating-point input only.

You can attach a front clip to the node. Attach forward and backward motion data to the forward flow (green) and backward flow (blue) tabs, respectively. You can attach the upper and lower outputs from the Motion Analysis node or import motion data from another source. See Motion Estimation Using Batch Nodes.

Access display controls from the Vector Viewer menu.

Forward buttonDisplays the forward motion vectors in the Result view.

Backward buttonDisplays the backward motion vectors in the Result view.

Arrow colour potsChange the display colour of the forward and backward motion vectors.

Grid fieldsSet the length of the pixel area used to calculate each vector. For example, enter 5 to sample an area of 25 pixels.

Scaling fieldsSet the size of the motion vectors.

BlendIn the Image window, display the previous frame, and set the level of opacity of the current frame. You can verify the displacement of points from one frame to the next when the opacity value is decreased.