C# Aforge 简单录制

// 首先用nuget 安装Aforge.video、Aforge.Video.FFMPEG、AForge.Video.DirectShow

//在Form1上拖个Button、videoPlayer两个控件，在videoPlayer控件中NewFrame方法

using AForge.Video;
using AForge.Video.DirectShow;
using AForge.Video.FFMPEG;
using System;
using System.Drawing;
using System.Windows.Forms;

namespace VideoRecordingExample
{
    public partial class Form1 : Form
    {
        private VideoCaptureDevice videoDevice;
        private VideoFileWriter videoWriter;
        private bool isRecording = false;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // Enumerate video devices
            FilterInfoCollection videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
            if (videoDevices.Count > 0)
            {
                foreach (FilterInfo device in videoDevices)
                {
                    comboBoxVideoDevices.Items.Add(device.Name);
                }
                comboBoxVideoDevices.SelectedIndex = 0;
            }
        }

        private void buttonStart_Click(object sender, EventArgs e)
        {
            if (videoDevice == null)
            {
                // Get the selected video device
                videoDevice = new VideoCaptureDevice(videoDevices[comboBoxVideoDevices.SelectedIndex].MonikerString);
                // Set the video device's resolution
                videoDevice.VideoResolution = videoDevice.VideoCapabilities[0];
                // Start the video preview
                videoSourcePlayer.VideoSource = videoDevice;
                videoSourcePlayer.Start();
            }

            if (isRecording)
            {
                // Stop recording
                isRecording = false;
                buttonStart.Text = "Start Recording";
                videoWriter.Close();
                videoWriter.Dispose();
            }
            else
            {
                // Start recording
                isRecording = true;
                buttonStart.Text = "Stop Recording";
                // Create the video file writer
                videoWriter = new VideoFileWriter();
                videoWriter.Open("output.avi", videoDevice.VideoResolution.FrameSize.Width, videoDevice.VideoResolution.FrameSize.Height, 25, VideoCodec.MPEG4);
            }
        }
        
        private void videoSourcePlayer_NewFrame(object sender, ref Bitmap image)
        {
            if (isRecording)
            {
                // Write the current frame to the video file writer
                videoWriter.WriteVideoFrame(image);
            }
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (videoDevice != null)
            {
                // Stop the video device and release resources
                videoDevice.SignalToStop();
                videoDevice.WaitForStop();
                videoDevice = null;
            }

            if (videoWriter != null)
            {
                // Close the video file writer
                videoWriter.Close();
                videoWriter.Dispose();
                videoWriter = null;
            }
        }
    }
}