Converts between representations of behavior (avi -> mat). See RECOGNITION_DEMO for general info. [datadir(set_ind)/namei.mat] --> [datadir(set_ind)/namei.avi] INPUTS set_ind - set index, value between 0 and nsets-1 maskflag - [optional] apply gaussian mask to resulting video. Applicable only if 'C' and 'mu' specified in each .mat file. See also RECOGNITION_DEMO, CONV_MOVIES2CLIPS