public static DefaultAcsClient InitVodClient()
        {
            String accessKeyId =";//用于标识用户
            String accessKeySecret = "";//用户用于加密签名字符串和VOD用来验证签名字符串的密钥
            // 构建一个 Client，用于发起请求
            string regionId = "cn-shanghai"; //目前仅支持cn-shanghai
            IClientProfile profile = Aliyun.Acs.Core.Profile.DefaultProfile.GetProfile(regionId, accessKeyId, accessKeySecret);
            return new DefaultAcsClient(profile);
        } 
　　　　 public VideoRequest CreateUploadVideo(string strTitle, string strFileName)
        {
            CreateUploadVideoRequest request = new CreateUploadVideoRequest();
            request.FileName = strFileName;
            request.Title = strTitle;
            DefaultAcsClient client = InitVodClient();
            CreateUploadVideoResponse response = client.GetAcsResponse(request);
            VideoRequest obj = new VideoRequest();
            obj.RequestId= response.RequestId;
            obj.UploadAddress= response.UploadAddress;
            obj.UploadAuth = response.UploadAuth;
            obj.VideoId = response.VideoId;
            return obj;
        }

        public void GetVideoStatis(string strVid)
        {
            DescribePlayVideoStatisRequest request = new DescribePlayVideoStatisRequest();
            request.StartTime = "";
            request.EndTime = "";
            request.VideoId = "";
            DefaultAcsClient client = InitVodClient();
            DescribePlayVideoStatisResponse response = client.GetAcsResponse(request);
        }

        public string GetPlayInfo(string strVid)
        {
            try
            {
                GetPlayInfoRequest request = new GetPlayInfoRequest();
                string strAliVid = this.GetAliVid(strVid);
                if (string.IsNullOrEmpty(strAliVid))
                {
                    return string.Empty;
                }
                request.VideoId = strAliVid;
                DefaultAcsClient client = InitVodClient();
                GetPlayInfoResponse response = client.GetAcsResponse(request);
                List<GetPlayInfoResponse.GetPlayInfo_PlayInfo> playInfoList = response.PlayInfoList;
                if (playInfoList.Count > 0)
                {
                    return playInfoList[0].PlayURL;
                }
                return string.Empty;
            }
            catch (Exception ex)
            {
                return string.Empty;
                throw;
            }
        }
        public string GetHRPlayInfo(string strVid)
        {
            try
            {
                GetPlayInfoRequest request = new GetPlayInfoRequest();
                request.VideoId = strVid;
                DefaultAcsClient client = InitVodClient();
                GetPlayInfoResponse response = client.GetAcsResponse(request);
                List<GetPlayInfoResponse.GetPlayInfo_PlayInfo> playInfoList = response.PlayInfoList;
                if (playInfoList.Count > 0)
                {
                    return playInfoList[0].PlayURL;
                }
                return string.Empty;
            }
            catch (Exception ex)
            {
                return string.Empty;
                throw;
            }
        }
        public Dictionary<string,string> GetVideoDefinition(string strVid)
        {
            try
            {
                GetPlayInfoRequest request = new GetPlayInfoRequest();
                Dictionary<string, string> dic = new Dictionary<string, string>();
                string strAliVid = this.GetAliVid(strVid);
                if (string.IsNullOrEmpty(strAliVid))
                {
                    return null;
                }
                request.VideoId = strAliVid;
                DefaultAcsClient client = InitVodClient();
                GetPlayInfoResponse response = client.GetAcsResponse(request);
                List<GetPlayInfoResponse.GetPlayInfo_PlayInfo> playInfoList = response.PlayInfoList;
                if (playInfoList.Count > 0)
                {
                    foreach (GetPlayInfoResponse.GetPlayInfo_PlayInfo item in playInfoList)
                    {
                        dic.Add(item.Definition,item.PlayURL);
                    }
                }
                return dic;
            }
            catch (Exception ex)
            {
                return null;
                throw;
            }
        }
        public Dictionary<string, string> GetHRVideoDefinition(string strVid)
        {
            try
            {
                GetPlayInfoRequest request = new GetPlayInfoRequest();
                Dictionary<string, string> dic = new Dictionary<string, string>();
                request.VideoId = strVid;
                DefaultAcsClient client = InitVodClient();
                GetPlayInfoResponse response = client.GetAcsResponse(request);
                List<GetPlayInfoResponse.GetPlayInfo_PlayInfo> playInfoList = response.PlayInfoList;
                if (playInfoList.Count > 0)
                {
                    foreach (GetPlayInfoResponse.GetPlayInfo_PlayInfo item in playInfoList)
                    {
                        dic.Add(item.Definition, item.PlayURL);
                    }
                }
                return dic;
            }
            catch (Exception ex)
            {
                return null;
                throw;
            }
        }

        public string GetVideoPlayAuth(string strVid)
        {
            try
            {
                GetVideoPlayAuthRequest request = new GetVideoPlayAuthRequest();
                string strAliVid = this.GetAliVid(strVid);
                if (string.IsNullOrEmpty(strAliVid))
                {
                    return string.Empty;
                }
                request.VideoId = strAliVid;
                DefaultAcsClient client = InitVodClient();
                GetVideoPlayAuthResponse response = client.GetAcsResponse(request);
                string strPlayAuth = response.PlayAuth;
                if (string.IsNullOrEmpty(strPlayAuth))
                {
                    return string.Empty;
                }
                return strPlayAuth;
            }
            catch (Exception ex)
            {
                return string.Empty;
                throw;
            }
        }

        public string GetHRVideoPlayAuth(string strVid)
        {
            try
            {
                GetVideoPlayAuthRequest request = new GetVideoPlayAuthRequest();
                request.VideoId = strVid;
                DefaultAcsClient client = InitVodClient();
                GetVideoPlayAuthResponse response = client.GetAcsResponse(request);
                string strPlayAuth = response.PlayAuth;
                if (string.IsNullOrEmpty(strPlayAuth))
                {
                    return string.Empty;
                }
                return strPlayAuth;
            }
            catch (Exception ex)
            {
                return string.Empty;
                throw;
            }
        }

        public bool RefreshUploadVideo(string strVid)
        {
            RefreshUploadVideoRequest request = new RefreshUploadVideoRequest();
            request.VideoId = strVid;
            DefaultAcsClient client = InitVodClient();
            RefreshUploadVideoResponse response = client.GetAcsResponse(request);
            return true;
        }