code: def test_download_ffmpeg():
      """
      Auxilary test to simply delete old ffmpeg binaries.
      """
      try:
          import glob, shutil
  
          found = glob.glob(
              os.path.join(tempfile.gettempdir(), "ffmpeg-static*")
          )
          if found and os.path.isdir(found[0]):
              shutil.rmtree(found[0])
      except Exception as e:
          if not isinstance(e, PermissionError):
              pytest.fail(str(e))
  
imports: import os
  import re
  import cv2
  import pytest
  import logging
  import platform
  import tempfile
  import subprocess
  from six import string_types
  from deffcode import FFdecoder
  from vidgear.gears import WriteGear
  from vidgear.gears.helper import check_output, logger_handler
label_desc: Use image node_id 5 for calling a global function with example usage: test_download_ffmpeg() without return types