code: def test_read_packed_b_frames_divx_file(self):
      name = (
          "hmdb51_Turnk_r_Pippi_Michel_cartwheel_f_cm_np2_le_med_6.avi"
      )
      f_name = os.path.join(VIDEO_DIR, name)
      pts, fps = io.read_video_timestamps(f_name)
  
      assert pts == sorted(pts)
      assert fps == 30
  
imports: import contextlib
  import os
  import sys
  import tempfile
  import pytest
  import torch
  import torchvision.io
  from common_utils import assert_equal
  from torchvision import get_video_backend
label_desc: Use image node_id 7 for calling the TestVideo obj's underlying member method code with example usage: obj.test_read_packed_b_frames_divx_file() without return types