def __init__(self, args, hidden_dim=96, **kwargs):
    super(SmallUpdateBlock, self).__init__(**kwargs)

    self.encoder = SmallMotionEncoder(args)
    self.gru = ConvGRU(hidden_dim=hidden_dim, input_dim=82 + 64)
    self.flow_head = FlowHead(hidden_dim=128, input_dim=hidden_dim)