基于C#实现屏幕录制功能

using System.Diagnostics;

namespace AppRecordScreen
{
    public partial class Form1 : Form
    {
        // 录屏相关变量  
        privatebool isRecording = false;
        private Process ffmpegProcess;
        privatestring outputVideoPath;
        // FFmpeg可执行文件的完整路径  
        privatestring ffmpegPath = 
        @"D:\Software\ffmpeg-master-latest-win64-gpl-shared
        \bin\ffmpeg.exe"; 
        public Form1()
        {
            InitializeComponent();
        }

        private async void btnStart_Click(object sender, EventArgs e)
        {
            if (!isRecording)
            {
                StartRecording();
            }
        }

        private void btnStop_Click(object sender, EventArgs e)
        {
            if (isRecording)
            {
                StopRecording();
            }
        }
        /// <summary>  
        /// 开始录制屏幕  
        /// </summary>  
        private void StartRecording()
        {
            // 生成唯一的视频文件名  
            outputVideoPath = Path.Combine(
                Environment.GetFolderPath(Environment.SpecialFolder.Desktop),
                $"ScreenRecord_
                {DateTime.Now:yyyyMMdd_HHmmss}.mp4"
            );

            try
            {
                // 使用FFmpeg进行屏幕录制  
                ffmpegProcess = new Process
                {
                    StartInfo = new ProcessStartInfo
                    {
                        // 使用完整路径  
                        FileName = ffmpegPath,
                        Arguments = $"-f gdigrab -framerate 30 -i desktop 
                        -c:v libx264 -preset ultrafast {outputVideoPath}",
                        UseShellExecute = false,
                        RedirectStandardInput = true,
                        CreateNoWindow = true
                    }
                };

                ffmpegProcess.Start();
                isRecording = true;

                MessageBox.Show("录制已开始", "提示", 
                MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            catch (Exception ex)
            {
                MessageBox.Show($"启动录制失败：{ex.Message}", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        /// <summary>  
        /// 停止录制屏幕  
        /// </summary>  
        private void StopRecording()
        {
            try
            {
                // 发送 'q' 命令给 FFmpeg 进程以正常结束录制  
                ffmpegProcess.StandardInput.WriteLine("q");
                ffmpegProcess.WaitForExit();

                isRecording = false;

                MessageBox.Show($"录制已完成。视频保存在：{outputVideoPath}", "提示", 
                MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
            catch (Exception ex)
            {
                MessageBox.Show($"停止录制失败：{ex.Message}", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        // 在关闭窗体时确保停止录制  
        protected override void OnFormClosing(FormClosingEventArgs e)
        {
            if (isRecording)
            {
                StopRecording();
            }
        }
    }
}