code: def supersample(clip, d, n_frames):
      """Replaces each frame at time t by the mean of `n_frames` equally spaced frames
      taken in the interval [t-d, t+d]. This results in motion blur.
      """
  
      def filter(get_frame, t):
          timings = np.linspace(t - d, t + d, n_frames)
          frame_average = np.mean(
              1.0
              * np.array(
                  [get_frame(t_) for t_ in timings], dtype="uint16"
              ),
              axis=0,
          )
          return frame_average.astype("uint8")
  
      return clip.transform(filter)
  
label_desc: Use image node_id 1 for calling a global function with example usage: supersample(clip, d, n_frames) and returns: clip, frame_average