code: def video_bitwise_bottom(x, model_hparams, vocab_size):
    
    pixel_embedding_size = 64
    inputs = x
    with tf.variable_scope("video_modality_bitwise", reuse=tf.AUTO_REUSE):
      common_layers.summarize_video(inputs, "bottom")
      # Embed bitwise.
      assert vocab_size == 256
      embedded = discretization.int_to_bit_embed(inputs, 8,
                                                 pixel_embedding_size)
      # Project.
      return tf.layers.dense(
          embedded,
          model_hparams.hidden_size,
          name="merge_pixel_embedded_frames")
docs: Bottom transformation for embedding video bitwise.