private void frameProcessing()
{
_capture = new Capture(_file);
totalFrameCount = _capture.GetCaptureProperty(Emgu.CV.CvEnum.CapProp.FrameCount);
progressBar1.Maximum = (int)totalFrameCount;
timer.Start();
_capture.ImageGrabbed += ProcessFrame;
if (timer.ElapsedMilliseconds == 1000) _capture.Stop();
}