Запись видео без конвертации

using Accord.Video;
using Accord.Video.DirectShow;
using Accord.Video.FFMPEG;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Media;
using System.Runtime.InteropServices;
using System.Threading;
using System.Windows.Forms;
 
namespace WindowsFormsApp3
{
    public partial class Form1 : Form
    {
        VideoCaptureDevice videoSource;
        FilterInfoCollection videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
        Bitmap bitmap;
        VideoFileWriter writer;
 
        public Form1()
        {
            InitializeComponent();
 
            pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
 
            if (videoDevices.Count > 0)
            {
                videoSource = new VideoCaptureDevice(videoDevices[0].MonikerString);
                videoSource.VideoResolution = videoSource.VideoCapabilities[0];
                videoSource.NewFrame += new NewFrameEventHandler(video_NewFrame);
 
                writer = new VideoFileWriter();
                writer.Open("test.mp4", videoSource.VideoResolution.FrameSize.Width, videoSource.VideoResolution.FrameSize.Height, 30, VideoCodec.H264, 6000000);
            }
 
            //writer = new VideoFileWriter();
            //writer.BitRate = 6000000;
            //writer.VideoCodec = VideoCodec.H264;
            //writer.Width = videoSource.VideoResolution.FrameSize.Width;
            //writer.Height = videoSource.VideoResolution.FrameSize.Height;
            //writer.FrameRate = 30;
 
            //writer.Open("test.mp4");
        }
 
        private void video_NewFrame(object sender, NewFrameEventArgs eventArgs)
        {
            Bitmap oldImage = bitmap;
 
            bitmap = new Bitmap(eventArgs.Frame);
 
            pictureBox1.Image = bitmap;
 
            writer.WriteVideoFrame(eventArgs.Frame);
 
            if (oldImage != null)
                oldImage.Dispose();
        }
 
        private void Button1_Click(object sender, EventArgs e)
        {
            videoSource.Start();
        }
    }
}

            //Первый пример
            writer = new VideoFileWriter();
            writer.Open("test.mp4", videoSource.VideoResolution.FrameSize.Width, videoSource.VideoResolution.FrameSize.Height, 30, VideoCodec.H264, 6000);
            //Второй пример
            writer = new VideoFileWriter
            {
                BitRate = 6000000,
                Codec = VideoCodec.MPEG4,
                Width = videoSource.VideoResolution.FrameSize.Width,
                Height = videoSource.VideoResolution.FrameSize.Height,
                FrameRate = 30
            };
            writer.Open("test.mp4");

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
//using AForge.Video;
//using AForge.Video.DirectShow;
//using AForge.Video.FFMPEG;
using System.Drawing.Imaging;
using Accord;
using Accord.Video;
using Accord.Video.DirectShow;
using Accord.Video.FFMPEG;
using System.IO;
using System.Media;
using System.Runtime.InteropServices;
using System.Threading;
 
namespace web_camera
{
    public partial class Form1 : Form
    {
        VideoCaptureDevice device;
        Bitmap image;
        VideoFileWriter writer;
        int a;
        public Form1()
        {
            InitializeComponent();
            comboBox1.DataSource = new FilterInfoCollection(FilterCategory.VideoInputDevice);
            comboBox1.SelectedIndex = 0;
            comboBox1.DisplayMember = "Name";
        }
 
 
 
 
        private void button1_Click(object sender, EventArgs e)
        {
            var filter = comboBox1.SelectedItem as FilterInfo;
            device = new VideoCaptureDevice(filter.MonikerString);
            device.NewFrame += device_NewFrame;
            device.Start();
        }
 
 
 
        private void button2_Click(object sender, EventArgs e)
        {
            pictureBox1.Image = null;
            StopCapture();
        }
 
        private void button3_Click(object sender, EventArgs e)
        {
            pictureBox1.Image.Save("pic"+ DateTime.Now.ToString("hhmmss")+ ".Jpg", ImageFormat.Jpeg);
        }
 
 
        void device_NewFrame(object sender, NewFrameEventArgs eventArgs)
        {
            if (pictureBox1.Image != null)
                pictureBox1.Image.Dispose();
 
 
            image = (Bitmap)eventArgs.Frame.Clone();
            pictureBox1.Image = (Bitmap)eventArgs.Frame.Clone();
            //pictureBox1.Image = image;
 
            if (a == 1)
            {
                
                try
                {
                    writer.WriteVideoFrame(image);
                }
                catch (Exception ex) { MessageBox.Show(ex.ToString()); }
            }
        }
 
 
        void StopCapture()
        {
            if (device == null) return;
 
            device.NewFrame -= device_NewFrame;
            device.SignalToStop();
        }
 
        protected override void OnClosed(EventArgs e)
        {
            base.OnClosed(e);
            StopCapture();
        }
 
        private void button4_Click(object sender, EventArgs e)
        {
            int width = 640;
            int height = 480;
            a = 1;
            // create instance of video writer
            writer = new VideoFileWriter();
            // create new video file
            writer.Open("test"+ DateTime.Now.ToString("hhmmss")+".mp4", width, height, 25, VideoCodec.Theora);
            // create a bitmap to save into the video file
            //image = new Bitmap(pictureBox1.Image);
            
        }
 
        private void button5_Click(object sender, EventArgs e)
        {
            if (writer != null)
            {
                writer.Close();
            }
            a = 0;
        }
    }
    }

device?.Stop();
writer?.Close();