<?xml version="1.0" encoding="UTF-8"?>
<tsduck>
  <_descriptors>

    <MPEG4_text_descriptor
        textFormat="uint8, required"
        ThreeGPPBaseFormat="uint8, required"
        profileLevel="uint8, required"
        durationClock="uint24, required"
        sampleDescriptionFlags="uint2, required"
        layer="uint8, required"
        text_track_width="uint16, required"
        text_track_height="uint16, required"
        scene_width="uint16, optional"
        scene_height="uint16, optional"
        horizontal_scene_offset="uint16, optional"
        vertical_scene_offset="uint16, optional">

      <Compatible_3GPPFormat value="uint8, required"/>

      <Sample_index_and_description
          sample_index="uint8, required"
          textFormat="uint8, required">
        Hexadecimal Content
      </Sample_index_and_description>

    </MPEG4_text_descriptor>

  </_descriptors>
</tsduck>
