public CutMergeTaskStatusResponse GetMergeTaskStatus(string mediaServerId, string taskId)
        {
            ResponseStruct rs;
            var            ret = MediaServerApis.GetMergeTaskStatus(mediaServerId, taskId, out rs);

            if (rs.Code != ErrorNumber.None)
            {
                throw new HttpResponseException(JsonHelper.ToJson(rs));
            }
            return(ret);
        }