code: def collate_fn(batch):
      # remove audio from the batch
      batch = [(d[0], d[2], d[3]) for d in batch]
      return default_collate(batch)
  
file_path: vision/references/video_classification/train.py
imports: import datetime
  import os
  import time
  import warnings
  import datasets
  import presets
  import torch
  import torch.utils.data
  import torchvision
  import torchvision.datasets.video_utils
  import utils
  from torch import nn
  from torch.utils.data.dataloader import default_collate
  from torchvision.datasets.samplers import DistributedSampler, RandomClipSampler, UniformClipSampler
label_desc: Use image node_id 4 for calling a global function with example usage: collate_fn(batch) and returns: default_collate