code: def multiply_speed(clip, factor=None, final_duration=None):
      """Returns a clip playing the current clip but at a speed multiplied by ``factor``.
  
      Instead of factor one can indicate the desired ``final_duration`` of the clip, and
      the factor will be automatically computed. The same effect is applied to the clip's
      audio and mask if any.
      """
      if final_duration:
          factor = 1.0 * clip.duration / final_duration
  
      new_clip = clip.time_transform(
          lambda t: factor * t, apply_to=["mask", "audio"]
      )
  
      if clip.duration is not None:
          new_clip = new_clip.with_duration(
              1.0 * clip.duration / factor
          )
  
      return new_clip
  
label_desc: Use image node_id 1 for calling a global function with example usage: multiply_speed(clip, factor, final_duration) and returns: new_clip