docstr: Test the case when decoder starts with a video file to decode frames, and
  video width is set.
docstr_tok: ["Test","the","case","when","decoder","starts","with","a","video","file","to","decode","frames",",","and","video","width","is","set","."]
code: def test_read_video_from_file_rescale_width(self, test_video):
      """
      Test the case when decoder starts with a video file to decode frames, and
      video width is set.
      """
      # video related
      width, height, min_dimension, max_dimension = 256, 0, 0, 0
      video_start_pts, video_end_pts = 0, -1
      video_timebase_num, video_timebase_den = 0, 1
      # audio related
      samples, channels = 0, 0
      audio_start_pts, audio_end_pts = 0, -1
      audio_timebase_num, audio_timebase_den = 0, 1
  
      full_path = os.path.join(VIDEO_DIR, test_video)
  
      tv_result = torch.ops.video_reader.read_video_from_file(
          full_path,
          SEEK_FRAME_MARGIN,
          0,  # getPtsOnly
          1,  # readVideoStream
          width,
          height,
          min_dimension,
          max_dimension,
          video_start_pts,
          video_end_pts,
          video_timebase_num,
          video_timebase_den,
          1,  # readAudioStream
          samples,
          channels,
          audio_start_pts,
          audio_end_pts,
          audio_timebase_num,
          audio_timebase_den,
      )
      assert tv_result[0].size(2) == width
  
imports: import collections
  import math
  import os
  from fractions import Fraction
  import numpy
  import pytest
  import torch
  import torchvision.io
  from common_utils import assert_equal
  from numpy.random import randint
  from pytest import approx
  from torchvision import set_video_backend
  from torchvision.io import _HAS_VIDEO_OPT
label_desc: Use image node_id 11 for calling the TestVideoReader obj's underlying member method code with example usage: obj.test_read_video_from_file_rescale_width(test_video) without return types