ffmpg转换FLV

//转FLV

public static string VideoConvertFlv(string FromName, string WidthAndHeight, string ExportName)
  {

  string ffmpeg = HttpContext.Current.Server.MapPath("~/FLV/ffmpeg.exe");
  string Command =" -i " + FromName + " -y -ab 56 -ar 22050 -b 500 -r 15 -s " + WidthAndHeight + " "+ ExportName; //Flv格式 
  //string Command = "E:\\FFmpeg\\ffmpeg.exe -i E:\\ClibDemo\\VideoPath\\admin\\a.wmv -y -ab 56 -ar 22050 -b 500 -r 15 -s 320*240 "+ ExportName; 
  System.Diagnostics.Process p = new System.Diagnostics.Process();
  p.StartInfo.FileName = ffmpeg;
  p.StartInfo.Arguments = Command; 
  p.StartInfo.WorkingDirectory = HttpContext.Current.Server.MapPath("~/FLV/");
  p.StartInfo.UseShellExecute = false;
  p.StartInfo.RedirectStandardInput = true;
  p.StartInfo.RedirectStandardOutput = true;
  p.StartInfo.RedirectStandardError = true;
  p.StartInfo.CreateNoWindow = false;
  //开始执行 
  p.Start();
  p.BeginErrorReadLine();
  p.WaitForExit();
  p.Close();
  p.Dispose();
  //p.StandardInput.WriteLine(Command);
  //p.StandardInput.WriteLine("Exit ");
  return ExportName;
  }

//同时生成PIC

  public static void GetImageFromVideo(string FromName, string imgName,string toolDir)
        {
            try
            {

                Process p = new Process();//建立外部调用线程
                p.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
                p.StartInfo.FileName = toolDir + @"\ffmpeg.exe";// HttpContext.Current.Server.MapPath(@"tool/ffmpeg.exe") ;//要调用外部程序的绝对路径                

                p.StartInfo.Arguments = @" -i " + FromName + " -y -f image2 -t 0.001 -s 150x150 " + imgName;//参数(这里就是FFMPEG的参数了)
                p.StartInfo.UseShellExecute = false;//不使用操作系统外壳程序启动线程(一定为FALSE,详细的请看MSDN)
                p.StartInfo.RedirectStandardError = true;//把外部程序错误输出写到StandardError流中(这个一定要注意,FFMPEG的所有输出信息,都为错误输出流,用StandardOutput是捕获不到任何消息的...
                p.StartInfo.CreateNoWindow = false;//不创建进程窗口
                p.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;

                p.Start();//启动线程
                p.WaitForExit();//等待完成
                p.StandardError.ReadToEnd();//开始同步读取
                p.Close();//关闭进程
                p.Dispose();//释放资源

            }
            catch (Exception err)
            {

            }
            finally
            {

            }

        }

 

string toolDir = @"D:\works\tool\";
            try
            {

               
                //.flv|.wmv
                System.IO.FileInfo fi = new System.IO.FileInfo(@"D:\works\.....avi");

                if (fi.Exists)
                {
                    string saveFlv = fi.FullName.Replace(fi.Extension, ".flv");
                    string saveImage = fi.FullName.Replace(fi.Extension, ".jpg");

                    VideoHelper.VideoConvertFlv(fi.FullName, saveFlv, "300x300", toolDir);
                    VideoHelper.GetImageFromVideo(saveFlv, saveImage, toolDir);
                }
            }
            catch(Exception ex)
            {
            }