code: def setUpClass(cls):
      super().setUpClass()
      torchaudio.utils.ffmpeg_utils.set_log_level(32)
  
imports: import io
  import math
  import torch
  import torchaudio
  from parameterized import parameterized, parameterized_class
  from torchaudio.io import CodecConfig, StreamReader, StreamWriter
  from torchaudio_unittest.common_utils import get_asset_path, get_sinusoid, nested_params, rgb_to_yuv_ccir, skipIfNoFFmpeg, skipIfNoModule, TempDirMixin, TorchaudioTestCase
  from .common import lt42
label_desc: Use image node_id 1 for calling the StreamWriterInterfaceTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types