C#调用FFMPEG实现桌面录制（视频+音频+生成本地文件）

using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.IO;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using Microsoft.DirectX;

using Microsoft.DirectX.DirectSound;

using System.Runtime.InteropServices;

namespace ClassTool

{

    public class RecordHelper

    {

        #region 模拟控制台信号需要使用的api

        [DllImport("kernel32.dll")]

        static extern bool GenerateConsoleCtrlEvent(int dwCtrlEvent, int dwProcessGroupId);

        [DllImport("kernel32.dll")]

        static extern bool SetConsoleCtrlHandler(IntPtr handlerRoutine, bool add);

        [DllImport("kernel32.dll")]

        static extern bool AttachConsole(int dwProcessId);

        [DllImport("kernel32.dll")]

        static extern bool FreeConsole();

        #endregion

        // ffmpeg进程

        static Process p = new Process();

        // ffmpeg.exe实体文件路径

        static string ffmpegPath = AppDomain.CurrentDomain.BaseDirectory + "ffmpeg\\ffmpeg.exe";

        /// <summary>

        /// 获取声音输入设备列表

        /// </summary>

        /// <returns>声音输入设备列表</returns>

        public static CaptureDevicesCollection GetAudioList()

        {

            CaptureDevicesCollection collection = new CaptureDevicesCollection();

            return collection;

        }

        /// <summary>

        /// 功能: 开始录制

        /// </summary>

        public static void Start(string audioDevice, string outFilePath)

        {

            if (File.Exists(outFilePath))

            {

                File.Delete(outFilePath);

            }

            /*转码，视频录制设备：gdigrab；录制对象：桌面；

             * 音频录制方式：dshow；

             * 视频编码格式：h.264；*/

            ProcessStartInfo startInfo = new ProcessStartInfo(ffmpegPath);

            startInfo.WindowStyle = ProcessWindowStyle.Normal;

            startInfo.Arguments = "-f gdigrab -framerate 15 -i desktop -f dshow -i audio=\"" + audioDevice + "\" -vcodec libx264 -preset:v ultrafast -tune:v zerolatency -acodec libmp3lame \"" + outFilePath + "\"";

            p.StartInfo = startInfo;

            p.Start();

        }

        /// <summary>

        /// 功能: 停止录制

        /// </summary>

        public static void Stop()

        {

            AttachConsole(p.Id);

            SetConsoleCtrlHandler(IntPtr.Zero, true);

            GenerateConsoleCtrlEvent(, );

            FreeConsole();

        }

    }

}