You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: browse_movieplotER.m
    path of file: ./repos/spm/external/fieldtrip/private
    
    the code of the file until where you have to start completion: function browse_movieplotER(cfg, data)

% BROWSE_MOVIEPLOTER is a helper function for FT_DATABROWSER and makes a

    
function browse_movieplotER(cfg, data)

% BROWSE_MOVIEPLOTER is a helper function for FT_DATABROWSER and makes a
% movie of the data that was selected. See ft_movieplotER for further details
% on the options that can be specified as cfg.selcfg in ft_databrowser.
%
% See also BROWSE_MOVIEPLOTER, BROWSE_TOPOPLOTER, BROWSE_MULTIPLOTER, BROWSE_TOPOPLOTVAR, BROWSE_SIMPLEFFT

% Copyright (c) 2009, Ingrid Nieuwenhuis

% convert to an ERP
timelock = ft_timelockanalysis([], data);

if isfield(cfg, 'framesfile')
  cfg.framesfile = [cfg.framesfile, '_s', num2str(data.cfg.trl(1)), 'tos', num2str(data.cfg.trl(2))];
end