Problem converting mp4 to hls

Im trying to create a project with membrane to convert an mp4-file to an hsl. I get this error message:
[error] Mp4ToHls/:parser_audio Error occured in Membrane Element:
** (MatchError) no match of right hand side value: <<64, 20, 0, 24, 0, 0, 1, 244, 0, 0, 1, 244, 0, 5, 128, 128, 128, 2, 17, 144>>

defmodule Mp4ToHls do
  use Membrane.Pipeline
  require Logger

  @input_file "/Users/samy/Desktop/voorstelling.mp4"
  @output_dir "output"

  def start_link(opts \\ []) do
    Membrane.Pipeline.start_link(__MODULE__, opts, name: __MODULE__)
  end

  @impl true
  def handle_init(_ctx, _opts) do
    File.rm_rf!(@output_dir)
    File.mkdir!(@output_dir)

    spec = [
      child(:source, %Membrane.File.Source{
        location: @input_file
      })
      |> child(:demuxer, Membrane.MP4.Demuxer.ISOM),
      get_child(:demuxer)
      |> via_out(:output, options: [kind: :video])
      |> child(:parser_video, %Membrane.H264.Parser{output_stream_structure: :annexb})
      |> via_in(Pad.ref(:input, :video),
        options: [encoding: :H264, segment_duration: Membrane.Time.seconds(4)]
      )
      |> get_child(:hls),
      get_child(:demuxer)
      |> via_out(:output, options: [kind: :audio])
      |> child(:parser_audio, %Membrane.AAC.Parser{})
      |> via_in(Pad.ref(:input, :audio),
        options: [encoding: :AAC, segment_duration: Membrane.Time.seconds(4)]
      )
      |> get_child(:hls),
      child(:hls, %Membrane.HTTPAdaptiveStream.SinkBin{
        manifest_module: Membrane.HTTPAdaptiveStream.HLS,
        target_window_duration: Membrane.Time.seconds(15),
        storage: %Membrane.HTTPAdaptiveStream.Storages.FileStorage{directory: @output_dir}
      })
    ]

    {[spec: spec], %{}}
  end

  @impl true
  def handle_child_notification({:track_playable, _track_info}, :hls, _context, state) do
    Logger.info("HLS playlist is ready.")
    send(:script, :playlist_ready)
    {[], state}
  end

  @impl true
  def handle_child_notification(notification, _element, _ctx, state) do
    Logger.debug("Notification received: #{inspect(notification)}")
    {[], state}
  end
end