if (('vp9'.localeCompare(match) === 0) || ('vp8'.localeCompare(match) === 0) || ('h264'.localeCompare(match) === 0) ||
                                ('red'.localeCompare(match) === 0) || ('ulpfec'.localeCompare(match) === 0) || ('rtx'.localeCompare(match) === 0)) {
                                if (enhanceData.videoBitrate !== undefined) {
                                    sdpStrRet += 'a=fmtp:' + rtpmapID[1] + ' x-google-min-bitrate=' + (enhanceData.videoBitrate) + ';x-google-max-bitrate=' + (enhanceData.videoBitrate) + '\r\n';
                                }