text: #include <vtkImageCanvasSource2D.h>
  #include <vtkMPEG2Writer.h>
  #include <vtkNew.h>
  
  int main(int argc, char* argv[])
  {
    vtkNew<vtkImageCanvasSource2D> source;
    source->SetScalarTypeToUnsignedChar();
    source->SetNumberOfScalarComponents(3);
    source->SetExtent(0, 100, 0, 100, 0, 0);
  
    vtkNew<vtkMPEG2Writer> writer;
  
    writer->SetInputConnection(source->GetOutputPort());
    writer->SetFileName("test.avi");
    writer->Start();
  
    for (unsigned int i = 0; i < 100; i++)
    {
      source->SetDrawColor(0, 0, 0, 1);   // black
      source->FillBox(0, 100, 0, 100);    // clear image
      source->SetDrawColor(255, 0, 0, 1); // red
      source->FillBox(i, 20, 10, 20);
      source->Update();
  
      writer->Write();
    }
    writer->End();
  
    return EXIT_SUCCESS;
  }
  