§3.4.

Unidirectional Stream Types

All unidirectional MOQT streams start with a variable-length integer indicating the type of the stream.

Table 3
ID Type
0x05 FETCH_HEADER (Section 10.4.4)
0x10-0x1D SUBGROUP_HEADER (Section 10.4.2)
0x2F00 SETUP (Section 9.4)

An endpoint that receives an unknown stream type MUST close the session.

Control streams (SETUP) are described in Section 3.3. Data streams (FETCH_HEADER, SUBGROUP_HEADER) are described in Section 10.

This is one section of the MoQT specification, rendered per-section for quick reference and citation. The authoritative text is draft-ietf-moq-transport-17 at the IETF.