image_viewer.py 文件源码

def enable_videowriter(self, output_filename, fourcc_string="MJPG",
                           fps=None):
        """ Write images to video file.

        Parameters
        ----------
        output_filename : str
            Output filename.
        fourcc_string : str
            The OpenCV FOURCC code that defines the video codec (check OpenCV
            documentation for more information).
        fps : Optional[float]
            Frames per second. If None, configured according to current
            parameters.

        """
        fourcc = cv2.VideoWriter_fourcc(*fourcc_string)
        if fps is None:
            fps = int(1000. / self._update_ms)
        self._video_writer = cv2.VideoWriter(
            output_filename, fourcc, fps, self._window_shape)