code: def get_command(self, video_path: str, output_path: str) -> List[str]:
      """
      Changes the video to be grayscale
  
      @param video_path: the path to the video to be augmented
  
      @param output_path: the path in which the resulting video will be stored.
  
      @returns: a list of strings containing the CLI FFMPEG command for
          the augmentation
      """
      return self.standard_filter_fmt(
          video_path, ["hue=s=0"], output_path
      )
  
imports: from typing import List
  from augly.video.augmenters.ffmpeg.base_augmenter import BaseVidgearFFMPEGAugmenter
label_desc: Use image node_id 1 for calling the VideoAugmenterByGrayscale obj's underlying member method code with example usage: obj.get_command(video_path, output_path) and returns: self