var com = new FFMPegCommands
            {
              //  Duration = 2,
                InFile = pathToFile,
                OutFile = pathToOut,
              //  StartTime = 5,
                PercentageShiftLeft = 10.0f,
               Crop = 0.75f,
                Aspect = "1024:768",
                Transform = false,
                Yaw = 0.0

            };
            totalFrames = com.Duration * 30;
           var inputFile = new MediaFile { Filename = pathToFile };
            using (engine = new Engine(pathToFFMpeg))
            {
                engine.ConvertProgressEvent += E_ConvertProgressEvent;
                engine.ConversionCompleteEvent += E_ConversionCompleteEvent;
                engine.CustomCommand(com.ConvertTransform);
            }