private void populateVideoData(FFMpegCore.IMediaAnalysis videoData, double startTime, double endTime, bitrate bitrate, bool twoPass)
        {
            try
            {
                double endTimeTemp   = endTime;
                double startTimeTemp = startTime;
                if (endTime == -1)
                {
                    endTimeTemp = videoData.PrimaryVideoStream.Duration.TotalMilliseconds;
                }
                if (startTime == -1)
                {
                    startTimeTemp = 0;
                }
                this.duration         = endTimeTemp - startTimeTemp;
                labelVideoLength.Text = "Output Video Length: " + TimeSpan.FromMilliseconds(this.duration).ToString(@"mm\m\:ss\s");


                labelAverageBitrate.Text = "Video Average Bitrate: " + (int)(videoData.PrimaryVideoStream.BitRate / 1000) + " kbps";
                labelAudioBitrate.Text   = "No Audio Tracks";
                if (videoData.PrimaryAudioStream != null && !double.IsNaN(videoData.PrimaryAudioStream.BitRate))
                {
                    labelAudioBitrate.Text = "Audio Average Bitrate: " + (int)(videoData.PrimaryAudioStream.BitRate / 1000) + " kbps";
                }


                textBoxMinBitrate.Text  = bitrate.minBitrate.ToString();
                textBoxAvgBitrate.Text  = bitrate.avgBitrate.ToString();
                textBoxMaxBitrate.Text  = bitrate.maxBitrate.ToString();
                checkBoxTwoPass.Checked = twoPass;
            }
            catch (Exception err)
            {
                Console.WriteLine(err.ToString());
            }
        }
        public AdvancedSettingsForm(FFMpegCore.IMediaAnalysis videoData, double startTime, double endTime, bitrate bitrate, bool twoPass)
        {
            InitializeComponent();
            this.bitrate = bitrate;

            this.videoData = videoData;
            this.twoPass   = twoPass;
            populateVideoData(videoData, startTime, endTime, bitrate, twoPass);
        }