问题描述
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?
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')
解决方法
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