QMediaPlayer,setPosition很慢
self.video_widget = QtMultimediaWidgets.QVideoWidget()
self.player = QtMultimedia.QMediaPlayer()
self.player.setVideoOutput(self.video_widget)
self.player.setSource(QtCore.QUrl.fromLocalFile(video_path)) # 选取视频文件
self.player.play() # 播放视频
此控件播放视频很方便,但setPosition很慢,即拖动不流畅

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