' value.  Note that this
                                   representation is the same as used by
                                   VirtualDub 1.6 and 1.7 in its Sylia
                                   Script files.  Nearly all useful
                                   DirectShow codecs can only be
                                   configured with 'codecParams' and they
                                   ignore the separate 'bitRate' and
                                   'gopSize' parameters give