docs: def get_cap_frames(self, *frame_nums):
          """ Stop capture on ports.
  
          :param frame_nums: list of frame numbers to read.
          :return: list of captured frames.
          """
  
          frames = []
          for frame_num in frame_nums:
              if self.captureBuffer.getframe(frame_num) == '0':
                  frames.append(self.captureBuffer.frame)
              else:
                  frames.append(None)
          return frames