code: func (config VideoNoteConfig) params() (map[string]string, error) {
  	params, _ := config.BaseFile.params()
  
  	if config.Length != 0 {
  		params["length"] = strconv.Itoa(config.Length)
  	}
  	if config.Duration != 0 {
  		params["duration"] = strconv.Itoa(config.Duration)
  	}
  
  	return params, nil
  }
docs: // params returns a map[string]string representation of VideoNoteConfig.