class_docstr: download
class_docstr_tok: ["download"]
code: def __getitem__(self, idx):
      video_path = self.csv["video_path"].values[idx]
      output_file = self.csv["feature_path"].values[idx]
      if not (os.path.isfile(output_file)):
          os.makedirs(os.path.dirname(output_file), exist_ok=True)
          cmd = "wget -O" + output_file + " " + video_path
          # import subprocess
          # subprocess.check_output(
          #    cmd,
          #    stderr=subprocess.STDOUT, shell=True)
          os.system(cmd)
      return {"video": None, "input": video_path, "output": output_file}
  
imports: import torch
  import pandas
  import os
  import numpy
  import ffmpeg
  import random
  from torch.utils.data import Dataset
label_desc: Use image node_id 1 for calling the VideoDownloader obj's underlying member method code with example usage: obj.__getitem__(idx) and returns: dict