❔ Hello im making a recording software for fun and my code isnt really working

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Threading;
using System.Windows.Forms;

namespace custos3
{
    public partial class Form1 : Form
    {
        private const int ScreenWidth = 1920;  // Replace with your screen width
        private const int ScreenHeight = 1080; // Replace with your screen height
        private const int FrameRate = 30;      // Frames per second
        private const int Duration = 5;        // Duration of recording in seconds

        private string outputFileName;

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            MessageBox.Show("hej");
            // Disable the button during recording
            button1.Enabled = false;

            // Generate a unique file name for the recording
            outputFileName = $"recording_{DateTime.Now:yyyyMMdd_HHmmss}.mp4";

            // Start a new thread to perform the recording
            Thread recordingThread = new Thread(RecordScreen);
            recordingThread.Start();
        }

        private void RecordScreen()
        {
            // Create a bitmap with the screen dimensions
            using (Bitmap screenshot = new Bitmap(ScreenWidth, ScreenHeight, PixelFormat.Format32bppArgb))
            {
                // Create a graphics object from the bitmap
                using (Graphics graphics = Graphics.FromImage(screenshot))
                {
                    // Create a VideoFileWriter with the output file name
                    Accord.Video.FFMPEG.VideoFileWriter videoWriter = new Accord.Video.FFMPEG.VideoFileWriter();
                    videoWriter.Open(outputFileName, ScreenWidth, ScreenHeight, FrameRate, Accord.Video.FFMPEG.VideoCodec.MPEG4);

                    // Calculate the total number of frames to record
                    int totalFrames = FrameRate * Duration;
                    int millisecondsPerFrame = 1000 / FrameRate;

                    // Start recording frames
                    for (int frame = 0; frame < totalFrames; frame++)
                    {
                        // Copy the screen contents to the bitmap
                        graphics.CopyFromScreen(0, 0, 0, 0, screenshot.Size);

                        // Write the frame to the video
                        videoWriter.WriteVideoFrame(screenshot);

                        // Wait for the next frame
                        Thread.Sleep(millisecondsPerFrame);
                    }

                    // Close the video writer
                    videoWriter.Close();
                }
            }

            // Enable the button after recording
            button1.Enabled = true;

            // Open the saved recording
            if (outputFileName != null)
                System.Diagnostics.Process.Start("explorer.exe", $"/select, \"{outputFileName}\"");
        }
    }
}