ffmpeg录音录像

#region ffmpeg录音录像 ffmpeg,ffplay,ffprobe主要用来录音录像播放查看多媒体文件的信息。本文带领大家学习常用命令。常用参数比较多，可以使用ffprobe --help来查看详细的帮助信息
        #region ffmpeg 录像
        Process process = null;
        private void btnFfmepgStart_Click(object sender, EventArgs e)
        {
            #region MyRegion

            //System.Diagnostics.Process.Start(@"C:\Users\Administrator\Desktop\Debug\WindowsFormsTestVideo.exe","参数122");

            //Process process1 = new Process();
            //process1.StartInfo = new ProcessStartInfo(@"C:\Users\Administrator\Desktop\Debug\WindowsFormsTestVideo.exe");
            //process1.StartInfo.Arguments = "参数12277777777777777";
            //process1.Start();
            ////process1.WaitForExit(10000);
            ////process1.Close();
            //process1.Dispose(); 
            #endregion

            //ProcessStartInfo StartInfo = new ProcessStartInfo(@"C:\Windows\System32\cmd.exe");
            process = new Process();
            process.StartInfo = new ProcessStartInfo(@"C:\Windows\System32\cmd.exe");
            process.StartInfo.CreateNoWindow = true;
            process.StartInfo.UseShellExecute = false;
            process.StartInfo.RedirectStandardInput = true;
            process.StartInfo.RedirectStandardOutput = true;
            process.StartInfo.RedirectStandardError = true;
            //process.StartInfo.WorkingDirectory = @"C:\Windows\System32";// AppDomain.CurrentDomain.BaseDirectory;
            process.StartInfo.WorkingDirectory = AppDomain.CurrentDomain.BaseDirectory;
            string a = "ffmpeg -rtbufsize 200M -f dshow  -i video=\"USB Camera\" -f dshow -i audio=\"麦克风阵列 (Realtek High Definition Audio)\" -pix_fmt yuv420p   -b:v 300k -r 10 -vcodec libx264 -tune zerolatency -acodec aac -b:a 32k -ar 16000 -af volume=10 -y  \"123.mp4\"";
            string at = @"ffmpeg -rtbufsize 200M -f dshow  -i video=""USB Camera"" -f dshow -i audio=""麦克风阵列 (Realtek High Definition Audio)"" -pix_fmt yuv420p   -b:v 300k -r 10 -vcodec libx264 -tune zerolatency -acodec aac -b:a 32k -ar 16000 -af volume=10 -y  ""123.mp4""";
            //Log(a, MessageType.info);
            //Log(at, MessageType.info);
            //process.StandardInput.WriteLine(a);
            process.OutputDataReceived += Process_OutputDataReceived;
            process.ErrorDataReceived += Process_ErrorDataReceived;
            //process.StartInfo.Arguments = a;

            process.Start();
            process.BeginErrorReadLine();
            process.BeginOutputReadLine();
            a = @"ffmpeg.exe -rtbufsize 200M  -f dshow  -i video=""USB Camera"" -f dshow -i audio=""麦克风阵列 (Realtek High Definition Audio)"" -pix_fmt yuv420p -tune zerolatency -af volume=5 -y 123.mp4";
            //噪音很大,去掉 -af volume=5，噪音会好很多
            //-ac 通道 声道 1，2；
            //-ar 8000 声音的采样率 psp 24000Hz
            //-ab 音频数据流，一般选择32，64，96，128 44100置成这个参数音频底噪会小，但是音色会有些发闷
            //-vol音量 放大倍数
            a = @"ffmpeg.exe -rtbufsize 200M  -f dshow  -i video=""USB Camera"" -f dshow -i audio=""麦克风阵列 (Realtek High Definition Audio)"" -pix_fmt yuv420p -tune zerolatency -ac 1 -ar 8000 -ab 44100 -vol 800 -y 123.mp4";

            process.StandardInput.WriteLine(a);
            //process.StandardInput.WriteLine(at/* + Environment.NewLine*/);
            //process.StandardInput.WriteLine("\r\n");
            Log(a, MessageType.info);
            Log(at, MessageType.info);
            lblffmepg.ForeColor = Color.Green;
            lblffmepg.Text = "开始录音录像";
        }

        private void Process_ErrorDataReceived(object sender, DataReceivedEventArgs e)
        {
            Log(e.Data, MessageType.error);
        }

        private void Process_OutputDataReceived(object sender, DataReceivedEventArgs e)
        {
            Log(e.Data, MessageType.info);
        }

        private void btnFfmpegStop_Click(object sender, EventArgs e)
        {
            string a = "q";
            process.StandardInput.WriteLine(a);
            process.StandardInput.WriteLine("exit");
            process.WaitForExit();
            process.Close();
            process.Dispose();
            Process.Start("123.mp4");

            lblffmepg.ForeColor = DefaultForeColor;

            lblffmepg.Text = null;
        }
        #endregion

        #region ffplay 播放
        // ffplay -autoexit ww.mp4
        #endregion

        #region ffprobe 查看信息
        // ffprobe -show_packets ww.mp4
        #endregion 
        #endregion