private void button11_Click(object sender, EventArgs e)
{
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
Image <Gray, Byte> last = null;
Image <Gray, float> flowX = null;
Image <Gray, float> flowY = null;
Image <Gray, byte> draw = null;
MKeyPoint[] keys;
Accord.Video.FFMPEG.VideoFileWriter wr = new Accord.Video.FFMPEG.VideoFileWriter();
VideoProcessig videoProcessig = new VideoProcessig(openFileDialog1.FileName, (map) =>
{
Image <Gray, Byte> image = new Image <Gray, byte>(map);
if (last == null)
{
last = image;
flowX = new Image <Gray, float>(map.Size);
flowY = new Image <Gray, float>(map.Size);
draw = new Image <Gray, byte>(map.Size);
wr.Open("result.avi", map.Width, map.Height);
return(map);
}
else
{
CvInvoke.CalcOpticalFlowFarneback(last, image, flowX, flowY, 0.5, 3, 10, 3, 5, 1.5, Emgu.CV.CvEnum.OpticalflowFarnebackFlag.Default);
last = image;
}
CvInvoke.AccumulateSquare(flowX, flowY);
CvInvoke.Canny(flowY.Convert <byte>(FloatToByte), draw, 40, 50);
var result = draw.Bitmap;
wr.WriteVideoFrame(result);
return(result);
});
videoProcessig.Show();
}
byte FloatToByte(float val)
{
return((byte)val);
}
}
/// <summary>
/// Writes a frame to the video
/// </summary>
/// <param name="frame">The new image to write to the video</param>
public void WriteVideoFrame(Bitmap frame)
{
lock (_writer_object_lock)
{
var ts = DateTime.Now - _last_call;
if (_writer != null && _writer.IsOpen)
{
try
{
_writer.WriteVideoFrame(frame, ts);
}
catch (Exception)
{
System.Console.WriteLine("Error encoding frame");
}
}
}
}
