code: def encode_aac(
      input, rate, name=None
  ):  # pylint: disable=redefined-builtin
      """Encode MP4(AAC) audio into string.
  
      Args:
        input: A `Tensor` of the audio input.
        rate: The sample rate of the audio.
        name: A name for the operation (optional).
  
      Returns:
        output: Encoded audio.
      """
      if sys.platform == "linux":
          try:
              from tensorflow_io.python.ops import (  # pylint: disable=import-outside-toplevel,unused-import
                  ffmpeg_ops,
              )
          except NotImplementedError:
              pass
      return core_ops.io_audio_encode_aac(input, rate, name=name)
  
imports: import sys
  import tensorflow
  from tensorflow_io.python.ops import core_ops
label_desc: Use image node_id 21 for calling a global function with example usage: encode_aac(input, rate, name) and returns: core_ops