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

    <AV1_video_descriptor
        version="uint7, required"
        seq_profile="uint3, required"
        seq_level_idx_0="uint5, required"
        seq_tier_0="uint1, required"
        high_bitdepth="bool, required"
        twelve_bit="bool, required"
        monochrome="bool, required"
        chroma_subsampling_x="bool, required"
        chroma_subsampling_y="bool, required"
        chroma_sample_position="unknown|vertical|colocated, required"
        HDR_WCG_idc="uint2, required"
        initial_presentation_delay_minus_one="uint4, optional"
        />

  </_descriptors>
</tsduck>
