string str = "";

                    if (ProcessNumber == 0)
                    {
                        str = e.Data;
                        ProcessHandlerClass.Getx264Status(ref str, ref Value);
                    }



        public static void Getx264Status(ref string str, ref double Value)
        {
            Regex regx264 = new Regex(@"(?<=\[)[^]]+(?=\%)");

            if (regx264.Match(str).Success)
            {
                if (!double.TryParse(regx264.Match(str).Value, out Value))
                    Value = 0;
                str = string.Format("x264: {0}% - {1} - {2}", Value, Regex.Match(str, @"(?<=,\s)[^]]+(?<=fps)").Value, Regex.Match(str, @"(?<=eta\s)[^]]+(?<=\d)").Value);
            }
            else if
               (str.Contains("encoded"))
            {
                Value = 100;
                str = string.Format("x264: {0}%", Value);
            }
            else
                str = "";
        }