§7.18.

FETCH_ERROR

A publisher sends a FETCH_ERROR control message in response to a failed FETCH.

FETCH_ERROR
{
  Type (i) = 0x19,
  Length (i),
  Subscribe ID (i),
  Error Code (i),
  Reason Phrase Length (i),
  Reason Phrase (..),
}
Figure 19: MOQT FETCH_ERROR Message
  • Subscribe ID: Subscription Identifier as defined in Section 7.4.

  • Error Code: Identifies an integer error code for fetch failure.

  • Reason Phrase: Provides the reason for fetch error.

The application SHOULD use a relevant error code in FETCH_ERROR, as defined below:

Table 5
Code Reason
0x0 Internal Error
0x1 Unauthorized
0x2 Timeout
0x3 Not Supported
0x4 Track Does Not Exist
0x5 Invalid Range

This is one section of the MoQT specification, rendered per-section for quick reference and citation. The authoritative text is draft-ietf-moq-transport-08 at the IETF.