如何将vtkAVIWriter配置为在末尾具有较小的avi文件？

如何解决如何将vtkAVIWriter配置为在末尾具有较小的avi文件？

我正在尝试使用vtkAVIWriter从vtk视图中制作视频。 我的问题是，生成的文件非常大（对于5帧/秒的40s视频，大约500Mo） 如何改善配置以使10-20Mo左右的视频具有可接受的质量？

以下是生成视频的部分代码：

def Play_PB_click(self):
    if self.timer is None:
        window = float(self.window_LE.text())
        if window < 0.01:
            window = 0.01
        delay = int(window * 1000)
        if self.Rec_RB.isChecked():
            fileName = QFileDialog.getSaveFileName(caption='Movie file',filter="AVI (*.avi)")
            if (fileName[0] == []):
                return
            self.imageFilter = vtk.vtkWindowToImageFilter()
            self.imageFilter.SetInput(self.MV_plot.vtkWidget.GetRenderWindow())
            self.imageFilter.SetInputBufferTypetoRGB()
            self.imageFilter.ReadFrontBufferOff()
            self.imageFilter.Update()
            self.writer = vtk.vtkAVIWriter()
            self.writer.SetInputConnection(self.imageFilter.GetoutputPort())
            self.writer.SetQuality(1)
            self.writer.SetRate(int(1 / window))
            self.writer.SetCompressorFourCC("DIB")
            self.writer.SetFileName(fileName[0])
            self.writer.Start()
        else:
            self.imageFilter = None
            self.writer = None

        self.timer = QTimer()
        self.timer.setInterval(delay)
        self.timer.timeout.connect(self.fromPlay)
        self.timer.start()
        self.Play_PB.setText('Pause')
    else:
        self.timer.stop()
        self.timer = None
        if not self.writer is None:
            self.writer.End()
            self.imageFilter = None
        self.writer = None
        self.Play_PB.setText('Play')


def fromPlay(self):
    self.myslider.setValue(self.myslider.value() + 1)
    if not self.imageFilter is None:
        self.imageFilter.Modified()
        self.writer.Write()
    if self.myslider.value() >= self.myslider.maximum():
        self.timer.stop()
        self.timer = None
        if not self.writer is None:
            self.writer.End()
        self.imageFilter = None
        self.writer = None
        self.Play_PB.setText('Play')