class_docstr: The default stem for optical flow.
code: def __init__(self):
      super(BasicFLowStem, self).__init__(
          nn.Conv3d(
              2,
              64,
              kernel_size=(3, 7, 7),
              stride=(1, 2, 2),
              padding=(1, 3, 3),
              bias=False,
          ),
          nn.BatchNorm3d(64),
          nn.ReLU(inplace=True),
      )
  
imports: import torch.nn
  from torch.hub import load_state_dict_from_url
label_desc: Use image node_id 1 to create a new BasicFLowStem object from inherited base classes: nn with example: obj = BasicFLowStem()