code: def get_video_chunk(fmt, frame_rate, *, width, height):
      path = get_asset_path("nasa_13013_no_audio.mp4")
      s = StreamReader(path)
      s.add_basic_video_stream(
          -1,
          -1,
          format=fmt,
          frame_rate=frame_rate,
          width=width,
          height=height,
      )
      s.stream()
      s.process_all_packets()
      (chunk,) = s.pop_chunks()
      return chunk
  
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 2 for calling a global function with example usage: get_video_chunk(fmt, frame_rate) and returns: chunk