class_docstr: Smoke test for ffmpeg_utils module
code: def tearDown(self):
      ffmpeg_utils.set_log_level(8)
      super().tearDown()
  
file_path: audio/test/torchaudio_unittest/utils/ffmpeg_utils_test.py
imports: from torchaudio.utils import ffmpeg_utils
  from torchaudio_unittest.common_utils import PytorchTestCase, skipIfNoFFmpeg
label_desc: Use image node_id 1 for calling the TestFFmpegUtils obj's underlying member method code with example usage: obj.tearDown() without return types