How can i save the opticFlow parameters of farnebacks algorithm for every two frames?

the farnebacks algorithm only saves the parameters for the last two frames. i want the code to estimate the opticflow parameters for every two frames from the beginning until the end of the video and save them all. any ideas?

[Walter Roberson]

http://www.mathworks.co.uk/matlabcentral/answers/43073-a-guide-to-tags