asp.net实现调用ffmpeg实现视频格式的转换

 //视频转换
    public void VideoConvertFlv(string FromName, string ExportName)
    {

        string ffmpeg = HttpContext.Current.Server.MapPath("~/UploadFiles/FLV/ffmpeg.exe");
        FromName = HttpContext.Current.Server.MapPath(FromName);
        ExportName = HttpContext.Current.Server.MapPath(ExportName);
        string Command = " -i \"" + FromName + "\" -y -ab 32 -ar 22050 -b 800000 -s  480*360 \"" + ExportName + "\""; //Flv格式  
        //string Command = " -i \"test.wmv\" -y -ab 32 -ar 22050 -b 800000 -s 320*240 \"2.flv\"";

        //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("~/UploadFiles/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();
    }

protected void btnSaveUploadVod_Click(object sender, EventArgs e)
    {
        string fileName = txtATitle.Text;//上传文件的名称的命名规则是标题
        bool flag = true;  //视频格式是否正确的标志
        if (fileName.Equals(""))
        {
            Response.Write("<script>alert(‘请先填写标题！‘)</script>");
        }
        else
        {
            filePathTemp = "UploadFiles/武夷概况/视频"; 
            string fpath = Path.Combine(Request.PhysicalApplicationPath, filePathTemp);
            UploadFile upFile = AspnetUpload.GetUploadFile("file2");
            if (upFile != null)
            {
                string sourceFileName = Path.GetFileName(upFile.get_FileName()); //取出上传的视频的文件名，进而取出该文件的扩展名
                string extendName = sourceFileName.Substring(sourceFileName.LastIndexOf(".") + 1);
                //上传后的文件名的命名规则是：标题+数字+后缀  
                if (!isAllowedVodType(extendName))
                {
                    flag = false;
                }
                else
                {
                    
                    VodWarehouseManage vodWarehouseBll = new VodWarehouseManage();
                    //先上传到服务器，然后转换格式，最后删掉原来非FLV格式的视频 
                    //上传后的文件名的命名规则是：标题+后缀  
                    string fileNameTemp = fileName + "." + extendName; 
                    string savePath = filePathTemp + "/" + fileNameTemp;
                    upFile.SaveAs(Path.Combine(fpath, fileNameTemp));
                    if (!extendName.ToLower().Equals("flv"))
                    {//进行视频转换


                        //调用视频转换函数将其它格式的视频转为FLV格式的视频  
                        string fromName = "~/" + savePath;
                        string exportName = "~/" + filePathTemp + "/" + fileName + ".flv";
                        // Response.Write("<script>alert(‘fromName=" + fromName + " and exportName=" + exportName + "‘)</script>");

                        //转换视频格式
                        VideoConvertFlv(fromName, exportName);

                        //删除非FLV格式的视频
                        vodWarehouseBll.DeleteFile(Path.Combine(fpath, fileNameTemp));

                        savePath = filePathTemp + "/" + fileName + ".flv";

                    }

                    //保存视频的信息 
                    VodWarehouse vodWarehouse = new VodWarehouse();
                    vodWarehouse.VodSortId = 17;//1代表媒体的类型为武夷概况
                    vodWarehouse.VodPath = savePath;
                    vodWarehouse.AttachId = Int32.Parse(articleId.Value);//隐藏域中的值

                    if (vodWarehouseBll.SaveVodsInfo(vodWarehouse) == false)
                    {
                        Response.Write("<script>alert(‘保存视频的过程出错！‘)</script>");
                    }
                    else
                    {
                        //Response.Write("<script>alert(‘视频上传成功！‘)</script>");
                        //将上传的路径写入相应的上传文本框中 

                    }
                }
            }//end foreach

            if (flag == true)
            {
                this.upLoadVodResult.Text = "视频上传成功";
                this.vodPannel.Visible = false;
            }
            else
            {
                //this.upLoadVodResult.Text = "您选择的视频的格式不正确，请确保您的视频的格式是：flv/mov/wmv/avi/mp4";
                Response.Write("<script>alert(‘您选择的视频的格式不正确，请确保您的视频的格式是：flv/mov/wmv/avi/mp4！‘)</script>");
            }
        }
    }