BLO-4020 M.1: MMTP publisher on IETF moq-transport (draft-14+) by kkroo · Pull Request #1 · Blockcast/moq-rs

kkroo · 2026-05-28T17:56:16Z

Summary

moq-catalog: adds Container enum (isobmff/mmtp/mfu/fec-repair) per draft-ramadan-moq-mmt §11.1 and an optional multicast: MulticastConfig extension per draft-ramadan-moq-multicast §4.1+§4.2.3. Both fields are opt-in (skip_serializing_if = "Option::is_none") so existing catalogs round-trip without diff.
moq-pub-mmtp (new sibling crate): publishes raw MMTP packets as MoQ object payloads. Reads from stdin (4-byte BE length-prefix framing) or UDP (one datagram = one packet). Per-track state keyed by MMTP packet_id from the catalog's multicast.endpoints[].tracks[]. Auto-creates <source>/repair sibling tracks for AL-FEC routing at priority 7. Posts the catalog JSON on the .catalog track at startup (priority 127, group 0).
mmt-core vendored under moq-pub-mmtp/vendor/mmt-core/ at libmmt commit 929e5b0c so the crate builds without a sibling libmmt checkout.

Why

BLO-4020 umbrella: replace cast's libmoq C-ABI hop with native Rust talking IETF moq-transport draft-14+. M.0 (baseline + scope-mismatch finding) and M.1 ADR are captured under .planning/. Option A locked: new sibling crate rather than patching upstream moq-pub or rewriting cast's bridge.

What's enforced (publisher invariants)

Invariant	Behavior on violation
A1 First MMTP packet of each new MPU is `FragmentType::Init`	Hard error (caller's job to send MPU metadata)
A2 MPU sequence numbers strictly non-decreasing per track	Hard error (moq-transport's `SubgroupsWriter::create` silently drops `group_id ≤ latest` at subgroup.rs:116-128 — A2 catches it)
A3 `packet_id` appears in the catalog's multicast map	Hard error

Repair group_id mirrors source MPU group_id so receivers can correlate repair symbols with the data they protect. Per-FEC-block grouping (parsing FEC Payload ID for SBN) is deferred to M.1b.

Test plan

cargo test -p moq-pub-mmtp — expect 30 passed (5 dispatch invariants, 5 repair routing, 6 framing, 4 MMTP parsing, 1 priority pin, 6 build_state_map error/happy paths, 1 catalog publication pin, 1 UDP recv→dispatch, 1 short-packet rejection, 1 routing edge case).
cargo test -p moq-catalog — expect 19 passed (Container enum spec values, multicast spec §4.1+§4.2.3 alignment, serde round-trips, optional-extension round-trips).
cargo build --release -p moq-pub-mmtp — green, zero warnings.
./target/release/moq-pub-mmtp --help — CLI surface includes --name, --catalog-json, --mmtp-input stdin|udp, --mmtp-udp-bind, --bind, and the flattened TLS flags from moq_native_ietf::tls::Args.

Out of scope (deferred per ADR)

MPU metadata synthesis from MFU (caller's responsibility — cast/ffmpeg).
MMTP fragmentation reassembly (M.1b).
Per-FEC-block grouping (M.1b).
Receiver decode/render (M.4).
End-to-end smoke + mlog framing verification (T9, P2 — depends on T5 catalog validation, T7 moq-sub-raw, T8 ffmpeg fork stdout mode).

ADR

.planning/moq-rs-m1-adr.md carries the full decision set (A1-A5/C1), 9 Implementation Tasks (T1-T9), and the GSTACK eng-review report (Codex outside-voice: 12 findings, 9 folded into T1-T9, 3 acknowledged as M.1b TODOs). This PR lands T6 + T1-T4 (Lane A: publisher path). T5/T7/T8/T9 remain.

🤖 Generated with Claude Code

T1 clock pub/sub + T2 fMP4 BBB pub/sub with --catalog both pass on Cloudflare moq-rs v0.7.17 (commit f9f51dc) over draft-14 wire. Establishes the working baseline for the BLO-4020 MMTP migration. Findings captured: - dev/pub vs dev/sub scope-mismatch: dev scripts connect to different URLs (root vs /<name>), landing in different multi-tenant scopes on moq-relay-ietf and surfacing as `namespace not found`. Not a spec bug — Cloudflare's tenant-scope feature layered on draft-14. Fix is one-line in dev/sub. - file-coordinator state leak: /tmp/moq-coordinator.json persists registrations across abrupt publisher exits, causing `duplicate` rejection on next announce. Local-dev annoyance; production uses Redis-backed moq-api. What this confirms for the migration: - G2 (publisher container) is the main work — moq-pub is firmly fMP4-coupled, MMTP needs a new container module. - G1 (catalog Container::Mmtp) is the smallest first change. - G6 (libmoq vs moq-rs draft-14 wire diff) remains open. - M.4 is "replace, not extend": moq-lite is a different wire and not worth bridging to draft-14. Logs captured under .planning/m0-logs/ for reproducibility. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Adds two optional shapes to moq_catalog::Root for the MMTP-on-MoQ migration (BLO-4020). Both fields are #[serde(skip_serializing_if = "Option::is_none")] so existing catalogs without the extensions round-trip without diff. 1. Container enum (Track.container field) per draft-ramadan-moq-mmt-00 §11.1 — values: isobmff | mmtp | mfu | fec-repair. Distinguishes how media is encapsulated inside MoQ objects from TrackPackaging (which is the IETF draft-01 catalog's cmaf vs loc streaming format). 2. multicast: Option<MulticastConfig> field per draft-ramadan-moq-multicast-00 §4.1 + §4.2.3 — describes one or more multicast endpoints with the MMTP packet_id → MoQ track map used by the multicast send-side. NetworkSource carries AMT relay discovery (type=amt, discovery=driad per §4.2.1). The OneOrMany<T> carrier preserves the "one object OR array" input form per §4.2.3 (single object does NOT become a one-element array on re-serialize). moq-pub/src/media.rs gets `multicast: None` to satisfy the new field on Root. 19 unit tests: - 4 Container enum (spec values, optional, default, accepts/omits) - 5 multicast spec alignment (§4.1 protocol-optional, networkSource at endpoint level, no simple-form fields, §4.2.3 OneOrMany single/array forms) - 5 serde round-trips - 4 multicast-extension parsing on Root - 1 TrackPackaging round-trip pin 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Captures the M.1 architecture decisions for MMTP-on-moq-transport (draft-14+) per umbrella BLO-4020. Option A locked: new sibling crate `moq-pub-mmtp` rather than patching upstream moq-pub or rewriting cast's bridge (Option B / Option C). Minimal blast radius, zero upstream-coordination latency. Decisions: A1 — Object 0 of each new MPU MUST be FragmentType::Init (publisher errors on violation; does NOT synthesize). A2 — MPU sequence numbers strictly non-decreasing per track (moq-transport's SubgroupsWriter::create silently drops group_id ≤ latest — A2 monotonicity check catches this). A3 — Unknown packet_id hard-errors. A4 — Smoke test verifies per-track sha256 (not concatenated) and mlog framing (not qlog). A5 — Vendor mmt-core under moq-pub-mmtp/vendor/ at pinned libmmt commit so the crate builds standalone. C1 — Stdin (length-prefix) AND UDP (datagram) input both supported; UDP for the multicast path. Implementation Tasks T1-T9 derived from the decisions; T6 + T1-T4 land Lane A (publisher path). T5 (catalog validation), T7 (moq-sub-raw), T8 (ffmpeg fork stdout mode), T9 (smoke) remain. GSTACK REVIEW REPORT footer: /gstack-plan-eng-review CLEARED; Codex outside-voice flagged 12 findings, 9 folded into the Implementation Tasks, 3 acknowledged as M.1b TODOs (object_id_delta verification, MMTP fragmentation reassembly, FEC source-block grouping). Handoff prompt (m1-next-session-prompt.md) captures the resume context for picking up mid-task. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

New sibling crate to moq-pub. Reads MMTP packets (from stdin with 4-byte BE length-prefix framing, or from a bound UDP socket) and publishes them as raw MoQ object payloads per draft-ramadan-moq-mmt §3.1+§4.1. Catalog is loaded from --catalog-json; per-track state keyed by MMTP packet_id from the multicast extension's endpoints[].tracks[] map. Implements M.1 ADR Implementation Tasks T6 + T1-T4: T6 — Vendor mmt-core under vendor/ libmmt commit 929e5b0c7a14f6ffe0ecd50d792fff7cdc44ba0a vendored so moq-pub-mmtp builds without a sibling libmmt checkout. Refresh procedure in vendor/mmt-core/VENDOR.md. Vendored Cargo.toml uses explicit versions (no workspace deps). Per ADR A5. T1 — Publisher loop with spec-true grouping Dispatch fn abstracted over TrackSubgroups + SubgroupWrite traits so the core logic is unit-testable without a real moq-transport session. Enforces three hard invariants: A1 — first packet of a new MPU is FragmentType::Init (publisher errors on violation; caller's responsibility to send MPU metadata first) A2 — MPU sequence numbers strictly non-decreasing per track. moq-transport's SubgroupsWriter::create silently drops subgroups whose group_id ≤ latest (subgroup.rs:116-128) — A2 is what catches the bug. A3 — unknown packet_id hard-errors (no silent drop) SubgroupsWriter::create({group_id: mpu_seq, subgroup_id: 0, priority}) — NOT append() — per Codex #5. Equal MPU sequence appends to the open subgroup. T2 — `.catalog` track posted at startup Full catalog JSON as one object on group 0 at priority 127. Caller retains the returned SubgroupsWriter so the track stays alive for the session. T3 — FEC repair routing on `<name>/repair` siblings build_state_map auto-creates a `<source>/repair` track for every catalog source track. Repair packets land at priority 7 (per draft-ramadan-moq-mmt §7.2). Repair group_id mirrors source MPU group_id so the receiver can correlate repair symbols with the source data they protect. Per-FEC-block grouping (parsing Source/Repair FEC Payload ID) is M.1b. T4 — UDP input mode tokio::net::UdpSocket::bind(--mmtp-udp-bind); each datagram is one MMTP packet (no length prefix — the datagram boundary IS the framing). recv_one_udp_packet() extracted as a testable helper. CLI parity with moq-pub for session setup: positional URL (no path), --name, --catalog-json, --mmtp-input stdin|udp, --mmtp-udp-bind, --bind, and the flattened moq_native_ietf::tls::Args (--tls-cert/--tls-key/--tls-root/ --tls-disable-verify). 30 unit tests: - 5 dispatch invariants (A1/A2/A3 + advance + equal) - 5 repair routing (sibling, priority 7, group correlation, unknown packet_id, before-source-MPU, missing-repair-sibling) - 6 framing (length-prefix encode/decode + EOF/partial/oversize) - 4 MMTP/MPU header parsing (route fn) - 6 build_state_map (no-multicast, no-endpoints, duplicate- packet_id, missing-track-reference, happy-path, repair-track- registration) - 1 priority_for_container pin - 1 publish_catalog_track registration pin - 1 UDP recv → dispatch integration - 1 mmtp_parse short-packet rejection Out of scope for M.1 (deferred): MPU metadata synthesis from MFU (caller's job), MMTP fragmentation reassembly (M.1b), per-FEC-block grouping (M.1b), receiver decode/render (M.4), moq-transport object_id_delta verification (Codex #6 follow-up landing in T9 mlog). 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Reflects post-rebase + post-PR state: - T6 + T1-T4 marked complete with the four commit SHAs landed on blo-4020-m1 (dbf5ee1, 6ee40ff, bde975d, 3101aca on base f0a709a after a clean 47-commit upstream rebase). - PR #1 link: #1. - Remotes documented (origin = cloudflare/moq-rs untouched; blockcast = Blockcast/moq-rs where local main tracks blockcast/blo-4020-m1). - Workflow notes added: new commits land on PR #1 automatically; branch off if T5/T7 want separate PRs. - Obsolete "uncommitted on main, ask before non-test edits" branch warning removed (no longer applicable). - Remaining T5/T7/T8/T9 scope carried forward unchanged. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Promotes catalog invariants from publisher-only runtime checks to library-level validation so subscribers can reject malformed catalogs without re-implementing the guards. moq-catalog: - New `CatalogValidationError` enum (Display + std::error::Error, no external deps). Three variants: DuplicatePacketId — T5a (draft-ramadan-moq-multicast §4.1) UnknownTrackReference — T5b FecRepairInCatalog — T5e (repair tracks are publisher-derived per ADR T3) - `Root::validate()` runs all three checks (first-error-wins). - `Root::expand_common_fields()` promotes commonTrackFields into each track entry (track-level overrides win). Replaces the previously-dead `Track::with_common` private helper. T5c. - `CommonTrackFields` gains `Clone` (needed for expand). moq-pub-mmtp: - `check_namespace_consistency(&Root, name)` — if commonTrackFields.namespace is Some(X) and X != --name, hard error. Catches a class of publisher misconfigurations. T5d. - main(): wired in order 1. catalog.validate() (lib-level guards) 2. check_namespace_consistency() (publisher CLI consistency) 3. catalog.expand_common_fields() (in-memory normalization; on-wire .catalog bytes remain the original authorial form) - `build_state_map` runtime guards (duplicate packet_id, unknown track ref) kept as defense in depth. Tests: - moq-catalog: +5 (3 validate + 2 expand_common_fields) → 24 total - moq-pub-mmtp: +3 (check_namespace_consistency) → 33 total 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

New sibling crate to moq-sub. Subscribes to named tracks on a MoQ broadcast and dumps each track's concatenated raw object payloads to its own file. Used by the M.1 smoke test (T9) for per-track sha256 verification — by dumping object payloads with NO separators (no length prefix, no timestamp), the publisher's input bytes and the subscriber's output bytes match byte-for-byte per track. CLI: paired `--track NAME --output PATH` arguments, repeatable. moq-sub-raw --name BBB \ --track v --output v.bin \ --track a --output a.bin \ https://localhost:4443 Implementation: - `drain_track_to_writer<W>` — extracted as a testable async fn so unit tests can drive it with in-process Tracks::produce pairs (no live relay required). Walks TrackReaderMode::Subgroups → groups.next → group.next → object.read, writing every chunk to W in arrival order. Returns total bytes written. - `validate_track_output_pairs` — surfaces CLI misconfigurations (empty args, mismatched counts) BEFORE opening a session. - main(): mirrors moq-sub's session template. Spawns one subscriber.subscribe task per track AND one drain task per track; tokio::select! over session.run + drain JoinSet. Tests (6 new): - validate_track_output_pairs: empty / mismatched / matched. - drain_concatenates_object_payloads_in_arrival_order — single subgroup, 3 objects, verify concat. - drain_concatenates_across_multiple_groups — producer/consumer run concurrently via tokio::join! with a 100ms gap between groups (SubgroupsReader surfaces only the latest subgroup — documented gotcha pinned by the test). - drain_writes_zero_bytes_on_empty_track — subgroups mode set but never written; drain returns Ok(0). Workspace entry added; Cargo.lock updated. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

The Blockcast FFmpeg fork's `moqenc_mmt` muxer already emits MMTP packets through standard AVIOContext to a `udp://group:port?multicast=1` URL. The proper way to wire moq-pub-mmtp as the consumer is to have its existing `--mmtp-input udp` listener auto-join when the bind target is a multicast address — no FFmpeg changes, no new flags on moq-pub-mmtp, just smarter UDP open. New `udp` module: - `is_multicast(SocketAddr) -> bool` — IPv4 and IPv6. - `open_udp_socket(target) -> UdpSocket`: * unicast target: bind directly. * multicast target: bind wildcard on target.port(), join the group on all interfaces, enable multicast loopback so a single-host smoke test can both send and receive. `run_udp_loop` swapped its raw `UdpSocket::bind` for `udp::open_udp_socket`, so `--mmtp-udp-bind 239.255.1.1:5004` now actually receives multicast. T8 ADR plan ("add stdout flag to ffmpeg muxer") superseded: the muxer's existing avio_write path through AVIOContext IS the proper FFmpeg interface. The dirty state in the FFmpeg fork is unrelated to this work (FEC algorithm FFI extension + IPv6 multicast egress fix in progress on a separate workstream). Tests (+6): - is_multicast: 4 (ipv4 multicast / unicast, ipv6 multicast / unicast). - open_unicast_binds_directly_to_target. - open_multicast_binds_wildcard_and_recvs_loopback — full end-to-end: open multicast listener, send via second socket, verify recv. Gracefully skips if sandboxed network lacks multicast loopback (treats timeout / open-error as skip). Total moq-pub-mmtp tests: 33 → 39. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Adds the M.1 ADR Definition-of-Done item: an end-to-end smoke test proving MMTP packets flow byte-for-byte through the new draft-14+ pipeline. Pipeline (5 processes, all out of this repo): synth_mmtp (Rust example, deterministic MPU sequences) → UDP loopback (127.0.0.1:5004) → moq-pub-mmtp --mmtp-input udp → moq-relay-ietf --dev --mlog-dir → moq-sub-raw (per-track payload dump) → per-track sha256 vs synth's expected files Verdict: PASS. Both tracks' sha256 match between publisher input and subscriber output; --mlog-dir captures SUBGROUP/OBJECT framing per draft-14. Full results recorded in .planning/moq-rs-m1-results.md. New files: - moq-pub-mmtp/examples/synth_mmtp.rs — deterministic MMTP packet generator. Emits valid MPU Init packets for two packet_ids (1=video, 2=audio) with predictable payloads. Outputs to UDP (one datagram = one packet) OR stdin (length-prefixed) AND writes expected per-track files for sha256 comparison. - .planning/m1-smoke.sh — orchestrator. Builds binaries, writes catalog, starts relay → pub → sub → synth, compares hashes, shows mlog, reports pass/fail. Idempotent across reruns. - .planning/moq-rs-m1-results.md — verdict, evidence, repro instructions, and the open M.1b items (FEC source-block grouping, fragmentation reassembly, libmoq G6 byte-diff). Pacing note: SubgroupsReader surfaces only the latest subgroup — the smoke uses --packet-delay-ms so the subscriber drains each MPU before the next supersedes. Already covered by a unit test in moq-sub-raw; documented in the results doc as a real-world constraint (real publishers are network-rate-limited). T8 status: superseded. The Blockcast FFmpeg fork's moqenc_mmt muxer already uses AVIOContext for UDP emission — no fork changes needed. The architecture pushback (no special stdout flag) is the correct call. T8.5 (moq-pub-mmtp multicast join, already landed) is the matching consumer-side support. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Updates the in-tree handoff prompt to reflect the post-T9 state: 9 commits on blo-4020-m1, 69 tests + smoke green, T1-T9 all landed (T8 N/A per ADR architecture pushback). Lists the four candidate follow-up tracks in priority order — A (PR merge prep), B (M.1b sub-tasks), C (M.2 cast bridge — ADR-gated), D (M.4 receiver inventory). No code changes; the doc tracks the closed state of the milestone and the open M.1b sub-tasks (fragmentation reassembly, per-FEC-block grouping, object_id_delta correctness, G6 byte-diff vs libmoq).

…M.2/M.4 ahead Refreshes the handoff prompt to reflect the 2026-05-28 M.1b session: - M.1b §B1=C closed by raw-passthrough fragmentation contract (PR #2). - M.1b §B3 forensics confirmed object_id_delta bug at moq-transport/src/session/subscribed.rs:281 (PR #3); upstream issue drafted in BLO-8047 awaiting external filing. - M.1b §B4 confirms wire-format divergence between cast/moq_lite and moq-pub-mmtp/IETF (PR #4); B2 re-scoped from "high operational value" → "M.4 prerequisite, deferred". Four stacked PRs on blo-4020-m1. Next session picks: - PR review / merge prep (likely fastest) - Upstream object_id_delta issue filing at cloudflare/moq-rs (use BLO-8047 draft) - M.2 cast bridge port (biggest blast radius; needs ADR + plan-phase first) - M.4 receiver migration (multi-object subgroup decoder, tier-switching fallback) Also documents the new FRAGMENT=N smoke env knob, the four follow-up branch names with detached upstreams, and the raw-passthrough contract as a carry-forward constraint. No code changes; doc tracks the post-M.1b state of the milestone.

Reflects 2026-05-28 session continuation: - M.4 ADR drafted on branch blockcast/blo-4020-m4-adr (commits ec8e4b7, 5ffd5e1, 1b0c577). A0-A3 locked; Q3-Q8 tactical questions still open. - Scope discovery: moqtail already on IETF draft-16 with MMTP container wired; Shaka MSF speaks drafts 14+16 with ALPN negotiation; hang-mmt-fec is the actual migration burden but Track 3 is INCLUDED per session sign-off. - Updates the "PICK ONE FOR NEXT SESSION" list: D becomes "M.4 ADR sign-off + T0 (publisher draft-16 bump)"; adds new E for "M.4 Track 1 (Shaka MMTP) implementation" as the post-T0 starting point. No code changes.

Reflects 2026-05-28 session continuation: - M.4 ADR Q3-Q8 signed off; Track 3 reshaped per Q7 (use moqtail-ts; skip Rust IETF subscriber fix). Total M.4 scope ~5-6 weeks. - T0 (publisher draft-16 bump) implemented + smoke-validated on branch blo-4020-m4-t0 (commit 9336e4a), PR #5 opened on the fork. Per-track sha256 IDENTICAL to M.1 baseline at FRAGMENT=0; mlog confirms selected_version DRAFT_16 in both QUIC sessions. - 113 moq-transport tests pass (+3 negotiation regression tests). Five PRs now stacked on blo-4020-m1; one fork-only branch with M.4 ADR. Pick list restructured: - D = M.4 Track 1 (Shaka MMTP container) — RECOMMENDED next, smallest - E = M.4 Track 2 (moqtail tier-switching) - F = M.4 Track 3 (MoqWatch port onto moqtail-ts; T3.1/T3.2 SKIPPED per Q7) - G/H/I = PR review, upstream issue, M.2 Track 1 start files: shaka-player/lib/msf/loc_parser.js and lib/transmuxer/loc_transmuxer.js (templates to mirror for MMTP). M.4 ADR §T1.1-T1.7 has the full task breakdown. No code changes; doc tracks the post-T0 state.

Reviews the three production changes shipped inside shaka commit 4df077593 (strip 14B MFU sub-header; store Init MPU on init ref; seedFromFmp4Init). Root finding: decision D9 ("init from in-band SPS/PPS") is contradicted by the design doc's own §2 ground truth (MFUs carry SEI+coded NALs, not param sets; SPS/PPS live in the Init-MPU avcC). Proposes D12: revert D9, reinstate the avcC-seed init path. Fix #1 KEEP+harden, #2 REWORK, #3 wire-in-or-delete. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

kkroo · 2026-06-01T17:55:37Z

Audit / review request: this PR opened 2026-05-28, before the moq-rs Ally webhook wiring (first moq-rs Ally review is #7 on 05-31), so it never received an automated review. Requesting an Ally pass. @ally / cc blockcast-ci-packages.

kkroo · 2026-06-13T02:43:13Z

Superseded by #20 (blo-4020-m4-t1 → main), which collapses the M.1 → M.4 T1 stack into a single main-targeted integration PR. Every commit here is contained in #20 (merge-base = main HEAD, clean fast-forwardable). Closing to consolidate review on one thread. Branch retained — not deleted — since blo-4020-m1 remains the base of #2/#3/#4/#5 and blo-4020-m4-t1 is #20's head + #7's base. Reopen if the incremental stack must be preserved.

Reflects post-rebase + post-PR state: - T6 + T1-T4 marked complete with the four commit SHAs landed on blo-4020-m1 (dbf5ee1, 6ee40ff, bde975d, 3101aca on base f0a709a after a clean 47-commit upstream rebase). - PR #1 link: #1. - Remotes documented (origin = cloudflare/moq-rs untouched; blockcast = Blockcast/moq-rs where local main tracks blockcast/blo-4020-m1). - Workflow notes added: new commits land on PR #1 automatically; branch off if T5/T7 want separate PRs. - Obsolete "uncommitted on main, ask before non-test edits" branch warning removed (no longer applicable). - Remaining T5/T7/T8/T9 scope carried forward unchanged. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Reviews the three production changes shipped inside shaka commit 4df077593 (strip 14B MFU sub-header; store Init MPU on init ref; seedFromFmp4Init). Root finding: decision D9 ("init from in-band SPS/PPS") is contradicted by the design doc's own §2 ground truth (MFUs carry SEI+coded NALs, not param sets; SPS/PPS live in the Init-MPU avcC). Proposes D12: revert D9, reinstate the avcC-seed init path. Fix #1 KEEP+harden, #2 REWORK, #3 wire-in-or-delete. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

kkroo and others added 10 commits May 28, 2026 17:52

kkroo added 2 commits May 28, 2026 21:47

kkroo mentioned this pull request May 28, 2026

BLO-4020 M.4 §T0: negotiate IETF moq-transport draft-16 (stacked on #1) #5

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7 tasks

blockcast-ci-packages Bot mentioned this pull request Jun 1, 2026

M.4 T1.2: video-playback planning + E2E harness/replay infra #7

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This was referenced Jun 13, 2026

BLO-10088: replace container catalog field #18

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M.4 T1: MMTP-over-MoQ — Mapping-B publisher, catalog conformance, transport subgroups, live Shaka E2E #20

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kkroo closed this Jun 13, 2026

This was referenced Jun 21, 2026

feat(mmtp): B2 SBN-keyed AL-FEC repair subgroup grouping (BLO-8047) #27

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feat(mmtp): M.1b complete — B1 fragmentation contract, B2 SBN repair grouping, B3+B4 docs (BLO-8047) #28

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allyblockcast Bot mentioned this pull request Jul 8, 2026

feat(moq-pub-mmtp): demand-driven SSM membership (subscribe-driven re-join) #33

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kkroo mentioned this pull request Jul 19, 2026

perf(moq-transport): idempotent waker register (drop the per-poll retain/clone/push) #47

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BLO-4020 M.1: MMTP publisher on IETF moq-transport (draft-14+) - #1

BLO-4020 M.1: MMTP publisher on IETF moq-transport (draft-14+)#1
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kkroo commented May 28, 2026

Summary

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kkroo commented Jun 13, 2026

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