Media over QUIC - Hang

draft-lcurley-moq-hang-02 | Individual submission | -02 submitted 2026-08-04 | 11 pages | Datatracker

2026-08-05: draft-lcurley-moq-hang bumped to -02 (2026-08-04) by Luke Curley — submitted in the same ~02:08 UTC batch as the new [[moq-cluster|draft-lcurley-moq-cluster-00]] and [[moq-timestamp|draft-lcurley-moq-timestamp-01]]. Hang is the media/conferencing layer of the moq-dev stack (the hang Rust crate and js/hang TypeScript package), long referenced in the wiki but not previously given its own page. This is its first wiki page, created as the -02 revision lands. Individual submission, not WG-adopted. See moq-dev, moq-lite.

Author

• Luke Curley (kixelated@gmail.com)

Abstract

Hang is a real-time conferencing protocol built on top of moq-lite. A room consists of multiple participants who publish media tracks. All updates are live — such as a change in participants or media tracks.

What it is

Hang sits above moq-lite the way HLS/DASH sit above HTTP: moq-lite (and the IETF moq-transport it derives from) moves opaque tracks/groups/frames; Hang defines the media-specific conventions on top — the catalog of participants and their tracks, codec/container handling, and the live room model where participant/track membership changes are themselves published as updates. It is the protocol behind moq-dev’s moq.pub / moq.watch browser clients and the cdn.moq.pro Hang CDN.

Implementation

Implemented in moq as:

• hang — the Rust crate (media layer / catalog)
• js/hang — the TypeScript package (a total rewrite, not derived from the old kixelated/moq-js)

The monorepo’s media gateways (RTMP/SRT/WHIP-WHEP/HLS/DASH), moq-transcode, and moq-mux all feed Hang broadcasts.

Relationship to moq-archive / recording

The separately-floated moq-archive chunked-recording format was not submitted as a standalone I-D; moq-dev PR #2574 proposed folding archival/recording into Hang as a “Recording” section instead. So Hang is also the intended home for MoQ’s DVR/recording semantics rather than a separate archive draft.

Notes

Individual submission by Luke Curley, not adopted by the MOQ working group. Prior revisions: draft-01 (referenced in the wiki index as the “Hang media layer”), now -02 (2026-08-04, 11 pages). One of several Luke Curley individual drafts (moq-lite, moq-timestamp, moq-cluster, compressed-mp4) that formalize mechanisms first prototyped in the moq-dev/moq stack.

Links

• Datatracker: https://datatracker.ietf.org/doc/draft-lcurley-moq-hang/
• Implementation: moq-dev/moq (hang crate + js/hang)
• Docs: doc.moq.dev

Related

• moq-lite — the transport Hang is built on
• moq-cluster / moq-timestamp — sibling drafts submitted the same day
• moq-dev — implementation
• luke-curley — author