function[obj] = setFramerate(obj)

if exist(obj.datafile, 'file')
    
    datafile = regexprep(obj.datafile, ' ','\\ ');
    [status sampling_rate_str] = system(['grep FRAMERATE ' datafile '|awk ''{print $4}''']);
    
    if ischar(sampling_rate_str)
        obj.sampling_rate = str2num(sampling_rate_str);
    end
        
    
    %% display(sprintf('\t\tFramerate : %3.2f Hz', obj.sampling_rate));
    
end