// frame received
procedure Tfmain.ImageEnView1MediaFoundationNotify(Sender, MediaFoundationObject: TObject; NotifyType: TIEMediaFountationNotifyType);
var
  sample: TIEMFReceivedSample;
begin
  sample := ImageEnView1.IO.MediaFoundationSourceReader.GetNextSample();
  try
    if sample.StreamType = mmf_VIDEO_STREAM then
    begin
      sample.DecodeSample(ImageEnView1.IEBitmap);

      --> Do something with ImageEnView1.IEBitmap...

      ImageEnView1.Update();
    end;
  finally
    sample.Free();
  end;

  inc(FPS);
end;