fix(mux): a TS export re-acquires on an unmarked step back a reorder bound proves by kixelated · Pull Request #7221 · moq-dev/moq

kixelated · 2026-10-29T06:14:28Z

Problem

An unmarked backward timeline step larger than the TS export's delay, but within a source group, left video clamped to the old decode timeline or failed the declared clock's depth check, and audio could fail a decode deadline.

Approach

Track::steps_back (rs/moq-mux/src/container/ts/export.rs) runs as each frame is read, before decode timestamps are reconstructed. It counts a frame as a synthetic restart/skip marker pair only where a reorder bound proves the frame falls outside valid reordering, and only when the frame is more than the export's delay below the highest PTS on the timeline:

Audio never reorders, so any such frame counts.
Video counts only when its rendition declares a catalog reorder, and the frame follows more frames than that depth in presentation order (DeclaredClock::reorders_past, factored out of push).
Video with no declared reorder is never checked: no detection, no rewrite, no error.

A synthesized marker reuses the existing restart path, which now also clears the old keyframe and leading-picture floor, and the jitter buffer's generation path. Restart and skip rise together, so loss-recovery accounting is unchanged. Placed tracks keep their arrival-time behavior, and nothing is detected without a delay.

Importers already fill the catalog reorder from the SPS (max_num_reorder_frames / sps_max_num_reorder_pics), so the catalog value is the single declared bound. The earlier time bounds (the inferred clock's observed reach, the SPS lookahead, the catalog jitter) are dropped from the check. reach was observation rather than a bound. The SPS lookahead is a B-pyramid heuristic: max_num_reorder_frames bounds frames, not presentation time. The catalog jitter also covers encoder latency and segment buffering.

Decisions

Contract for video without a reorder bound (maintainer, 2026-11-03):

✅ Detect a backward step only where a reorder bound proves the frame falls outside valid reordering. Streams with undeclared reordering are left untouched: no detection, no rewrite, no error.
Replan detection around codec picture ordering or deferred classification so undeclared sources keep automatic recovery.

Choices made while applying it, for review:

The delay gate stays for declared video. "Only where" is a necessary condition, so a step back within the delay that exceeds the declared depth still fails the export, as export_declared_zero_reorder_decodes_at_presentation requires. quest/m1/ts-small-step-back.md owns those smaller steps. This PR removes its Required link, so that quest is now unblocked.
A keyframe is checked against the previous group's declared clock. The depth bounds the whole stream, so a group stepped back whole restarts as well.
The decision is recorded in the TS reliability epic, since this PR deletes the finished step-back.md.

Design change comment.

Impact

Public API: none.
Wire format: none.
A video rendition with a declared reorder, and audio, re-acquire on a step back larger than the delay, instead of clamping video, failing the declared clock, or failing an audio deadline.
Video with no declared reorder behaves as on main.

Alternatives

Weakening the shared jitter buffer's backward rule would mistake placed MPEG-1/2 B-picture PTS for steps, and would miss part of a step hidden inside a shared audio PES. Detecting before decode reconstruction and reusing markers keeps that policy in the TS exporter.

Validation

On d3509992e43af2b2ad710bbe37c3a10dc09a709b:

cargo test -p moq-mux --all-features: 2,020 passed, 3 ignored.
cargo clippy -p moq-mux --all-targets --all-features -- -D warnings: clean. cargo fmt: clean.
quest check --base origin/main: ok.
New a_declared_reorder_bounds_a_step_back covers four cases at reorder depth 2:
- an in-bound pyramid: 0 steps;
- an out-of-bound −560 ms step within a group: 1 step;
- a group stepped back whole: 1 step;
- an in-bound two-frame reorder presented 960 ms back: 0 steps.
New undeclared_reordering_never_steps_back covers two undeclared cases, both at 0 steps:
- the reproduced 0, 1600, 800 ms reorder at a 500 ms delay;
- a −560 ms step.
an_unmarked_step_keeps_the_export_rendering: the +4.7 h and +2 s steps run on both clocks, the −560 ms step on declared video, each at three audio lags. No drops, and at least 6 groups rendered after the step.
A local probe, not committed, sent undeclared and declared video with steps of −1 to −400 ms at three lags:
- Steps of −100 ms or less pass with no drops.
- A −200 ms step fails an audio decode deadline at lag 0 on either clock. That is a step within the delay, which ts-small-step-back.md owns.
- Undeclared video at −400 ms still drops 105 frames, as on main.

main was merged twice; the only conflict was the epic's Required list. moq-dev/moq#7727 (TS timing on a stalled PCR) is still open and does not touch this code.

Review

mechanical fix by quest land watch: merged main at 55d5a14fbac345e11237ed74183865b73f12304f with the quest merge driver (head 6e0c077)

Codex gpt-6.1-sol, medium effort, new session 01a1a3f1-abbc-7750-b6d9-b023deeb4ae1 (started with --new after the design change).
Round 1 on d3509992e43af2b2ad710bbe37c3a10dc09a709b: no findings.
Pullfrog's undeclared-B-pyramid finding: fixed by the decision above. An undeclared rendition is never checked, and undeclared_reordering_never_steps_back pins it.

Follow-ups

None new. Steps within the delay are already quest/m1/ts-small-step-back.md.

🤖 Generated with Claude Code

(Written by Claude Opus 5.5)

Quest-Claim: 3fb3ded36f489fdf

…cabb741464b

A source whose timeline steps back by more than the export's delay, mid-group and with no marker, now restarts the track's decode clock and opens a new jitter generation, as a declared marker would. Before, the video decode clock clamped every DTS after the step onto the old timeline, so the video arrived late until it caught up, and audio with slack left decoded before what it had already sent, which failed the export on a missed decode deadline. Finishes quest/m1/ts-reliability/step-back.md. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

A rendition that declares its catalog `reorder` bounds reordering by frames, not time, so a low frame rate pyramid can present a frame further below the highest PTS than the delay. Such a frame only steps the timeline when the declared clock would also refuse it as reordered past its depth. The inferred clock's bound also takes the reordering it has seen. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

…cabb741464b

coderabbitai · 2026-11-01T23:27:01Z

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Reviewing files that changed from the base of the PR and between 55d5a14 and 6e0c077.

Files selected for processing: 6

quest/m1/ts-reliability/README.md
quest/m1/ts-reliability/step-back.md
quest/m1/ts-small-step-back.md
rs/moq-mux/src/container/declared.rs
rs/moq-mux/src/container/ts/export.rs
rs/moq-mux/src/container/ts/export_timing_test.rs

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kixelated

Automated review by review (OpenAI)

Reviewed commit: 384dd9c376096a706a70c1b8ba4412d663f4d571.

No additional actionable bugs established in the changed code. The direction is sound for the stated >delay rewind: detecting it before DTS reconstruction and reusing the marker path is simpler than weakening the shared jitter buffer's backward-step rule. Keeping synthetic restart/skip counts paired preserves loss-recovery semantics; the declared-depth guard also avoids treating valid declared reordering as a restart. The regression matrix exercises both clocks and audio/video arrival skew.

Verification limits: static inspection of the diff, surrounding queue/release/rebind paths and both decode clocks; I did not run tests or validate the reported test results. The PR's acknowledged undeclared low-frame-rate first-reorder ambiguity remains unverified, as does the explicitly deferred <=delay rewind case; this review does not establish support for those cases.

(Written by OpenAI)

pullfrog

ℹ️ No blocking issues — the timeline state machine holds on every reset path I traced. One acknowledged edge is worth pinning.

Reviewed changes

An unmarked step back becomes a marker of the track's own — Track::steps_back (rs/moq-mux/src/container/ts/export.rs:538) counts a frame read more than bound below the track's running high PTS as one marker, bumping steps and the frame's restart/skip together so the recovery gap is unchanged. Placed kinds are skipped.
The decode clock restarts on the synthesized break — the pending.restart != self.restart branch in Track::queue now also clears keyframe/leading_floor, and pending.restart/skip carry the accumulated steps.
DeclaredClock::reorders_past — the depth test is factored out of push and reused to bound a declared rendition by frame count.
DecodeClock::reach — exposes the reordering already seen, so the inferred bound includes it.
Test — an_unmarked_step_keeps_the_export_rendering adds a −560 ms step across inferred and declared (reorder: 2) video at three audio lags, asserting zero drops and at least six groups rendered after.
Quest — deletes the finished step-back.md and sizes the childless epic [L].

ℹ️ An undeclared deep B-pyramid can fabricate a restart

steps_back runs before the frame reaches the decode clock, so bound never counts the reordering of the frame being read, only what the clock has already seen (DecodeClock::reach, updated in push). For a rendition that declares no catalog reorder and whose SPS declares none either, Timing::inferred yields (0,0) and bound is just the export delay at the first reordered frame: a B-pyramid whose (2^depth - 1) frame span exceeds delay then satisfies high - pts > bound and synthesizes a spurious step at startup. The declared path is gated by reorders_past's frame count; the inferred path has no equivalent gate. This is the narrow case the PR body already records as a follow-up — a test like the one in this PR, but with an undeclared pyramid narrow enough that its span clears the delay, would pin whether the frame-count gate belongs on the inferred path too.

Technical details

# Inferred-path step bound carries no frame-count gate

## Affected sites
- `rs/moq-mux/src/container/ts/export.rs:546` — `bound = delay.max(lookahead).max(self.timing.jitter).max(self.clock.reach())`; for an undeclared rendition with no SPS reorder, `lookahead == 0` (via `Timing::inferred`, lines 978-984) and `jitter == 0`, leaving `bound == delay`.
- `rs/moq-mux/src/container/ts/export.rs:547-551` — `reordered` is a frame-count gate only when `self.declared` is `Some`; on the inferred path it is `true`.
- `rs/moq-mux/src/container/ts/export.rs:602` — `steps_back` runs before the frame is pushed, so `self.clock.reach()` reflects only frames already read.

## Required outcome
- A healthy inferred B-pyramid whose reorder span exceeds `delay` must not fabricate a step on its first reordered frame.

## Suggested approach (optional)
- Gate the inferred path by frame count too, or seed `bound` from the SPS-declared reorder even when the catalog declares none, and pin the chosen behavior with an end-to-end test using an undeclared pyramid whose span exceeds `delay`.

^{｜ Fix it ➔ ｜ View workflow run ｜ Using deepseek-v4.1-flash (free via Pullfrog for OSS) ｜ 𝕏}

moq-bot · 2026-11-02T10:25:42Z

quest land watch: the merge queue removed this pull request at 384dd9c because its merge_group build failed (failed_checks).

The land fixer works on it in the background, and the watcher re-enqueues it at the back of the queue once it is fixed or judged flaky, or hands it back here with what it needs.

Queue / Queue (job) failure at step Check:

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warning: unused import: `Io`
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error: `moq-relay` (lib) generated 1 warning (run `cargo clippy --fix --lib -p moq-relay` to apply 1 suggestion)
error: warnings are denied by `build.warnings` configuration
warning: build failed, waiting for other jobs to finish...
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error: command `/nix/store/85lxjwg78jw6rf7pqkf3vcq6291nrlfh-cargo-1.98.1-x86_64-unknown-linux-gnu/bin/cargo '--color=auto' test --no-run --message-format json-render-diagnostics --package 'path+file:///var/cache/github-runner-work/moq/moq/demo/carla/bridge#moq-carla-bridge@0.1.0' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/hang#0.21.11' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-audio#0.1.10' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-boy#0.5.12' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-c#0.7.0' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-cli#0.14.2' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-ffi#0.4.12' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-gst#0.4.12' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-hls#0.5.11' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-mux#0.10.11' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-rtc#0.3.12' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-rtmp#0.3.11' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-rtsp#0.1.0' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-scene#0.1.0' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-srt#0.3.11' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-studio#0.1.0' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-transcode#0.1.10' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-video#0.1.10' --package moq-video --package moq-audio --tests --features 'moq-video/capture moq-audio/capture moq-audio/playback moq-cli/play moq-cli/openh264' --timings --locked` exited with code 101
mbx[cache]: object cache: 418 hits, 300 misses, 18 not looked up, 2 bypassed; 0 B downloaded, 0 B uploaded, 2.7 GiB stored locally
mbx[cache]: 2m 52s session; 3m 47s estimated compiler time avoided (summed across compilations)
mbx[cache]: 18 compilations had no usable prior inputs or matching prediction for a lookup
mbx[cache]: bypass reasons: 2 unsupported-crate-type
mbx[cache]: Cargo artifact reuse and CI cache archive transfers are not included above
mbx[savings]: has saved 8d 4h across 11699 builds. this line is the only thanks it needs.
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[command]/nix/store/lg46w7hrjx7kylsh6645c9l975i8h43b-git-2.55.0/bin/git submodule foreach --recursive git config --local --show-origin --name-only --get-regexp remote.origin.url
A job completed hook has been configured by the self-hosted runner administrator
##[group]Run '/nix/store/gx2v6q84b0w43bafm0whkdx93qyxbpps-ci-cache-gc.sh/bin/ci-cache-gc.sh'
shell: /nix/store/1mv3qz005gkbalxfghk4y3s8ayv4d2dl-bash-interactive-5.3p15/bin/bash --noprofile --norc -e -o pipefail {0}
##[endgroup]
evicted 1614 objects and 0 action results (2.8 GiB logical); 50.0 GiB logical remain
dropped 2 stale checkout records
dropped 6 session event streams
removed 0 learned incremental units and 2 checkout directories (3.7 KiB logical); 140 units (4.7 GiB logical) remain
evicted 0 objects and 0 action results (0 B logical); 50.0 GiB logical remain
removed 2 target directories (13.7 MiB logical, 2 abandoned and 0 live); 6.0 GiB logical remain
Cleaning up orphan processes

(written by quest land watch)

moq-bot · 2026-11-02T10:36:00Z

codex / Codex land fixer note:

The logged failure is an unused Io re-export in rs/moq-relay/src/listener.rs, with warnings denied. Base commit 1eaff23 introduced that re-export after this PR's branch point. This PR changes mux timing and quest documents, not the relay import or the failing check, so blame is unset. The pinned PR head remains unchanged. Its mux and relay tests passed with warnings denied and clippy-driver enabled; the relay library also passed clippy with no default features and warnings denied. The base should be checked independently.

(written by codex / Codex)

moq-bot · 2026-11-02T10:36:02Z

quest land watch: re-enqueued this pull request at 384dd9c, at the back of the merge queue, unchanged, since the land fixer judged the failure flaky: test rs: moq-relay unused import `Io` (warnings denied).

(written by quest land watch)

moq-bot · 2026-11-02T11:10:38Z

quest land watch: the merge queue removed this pull request at 384dd9c because its merge_group build failed (failed_checks).

The land fixer works on it in the background, and the watcher re-enqueues it at the back of the queue once it is fixed or judged flaky, or hands it back here with what it needs.

Queue / Queue (job) failure at step Check:

…til v0.1.21
   Compiling rcgen v0.14.10
   Compiling futures v0.3.34
   Compiling tower-http v0.6.11
   Compiling hyper-rustls v0.27.10
   Compiling kio v0.6.2 (/var/cache/github-runner-work/moq/moq/rs/kio)
   Compiling ebml-iterable v0.7.1
   Compiling wayland-backend v0.3.17
   Compiling tokio-tungstenite v0.30.0
   Compiling moq-net v0.3.10 (/var/cache/github-runner-work/moq/moq/rs/moq-net)
   Compiling webm-iterable v0.7.1
   Compiling moq-congestion v0.1.0 (/var/cache/github-runner-work/moq/moq/rs/moq-congestion)
   Compiling reqwest v0.13.5
   Compiling mdns-sd v0.21.5
   Compiling x509-parser v0.18.1
   Compiling moq-quic v0.1.0 (/var/cache/github-runner-work/moq/moq/rs/moq-quic)
   Compiling wayland-client v0.31.15
   Compiling regex-automata v0.4.18
   Compiling wayland-protocols v0.32.13
   Compiling x11rb v0.14.0
   Compiling wayland-csd-frame v0.3.0
   Compiling wayland-cursor v0.31.14
   Compiling regex v1.13.1
   Compiling wayland-protocols-wlr v0.3.12
   Compiling axum v0.8.9
   Compiling calloop v0.13.0
   Compiling bindgen v0.70.1
   Compiling calloop-wayland-source v0.3.0
   Compiling dimpl v0.7.4
   Compiling tempfile v3.27.0
   Compiling smithay-client-toolkit v0.19.2
   Compiling moq-vaapi v0.1.0
   Compiling wayland-protocols-plasma v0.3.12
   Compiling md-5 v0.11.0
   Compiling moka v0.12.16
   Compiling sctk-adwaita v0.10.1
   Compiling object_store v0.14.2
   Compiling str0m-proto v0.7.0
   Compiling winit v0.30.13
   Compiling glib v0.22.10
   Compiling http-cache v1.0.0-alpha.8
   Compiling str0m-aws-lc-rs v0.6.0
   Compiling is v0.11.1
   Compiling gstreamer v0.25.4
   Compiling reqwest-middleware v0.5.2
   Compiling calloop v0.14.5
   Compiling retina v0.4.21
   Compiling calloop-wayland-source v0.4.1
   Compiling str0m v0.24.1
   Compiling http-cache-reqwest v1.0.0-alpha.9
   Compiling srt-tokio v0.4.4
   Compiling gstreamer-base v0.25.4
   Compiling moq-auth v0.2.1 (/var/cache/github-runner-work/moq/moq/rs/moq-auth)
   Compiling axum-server v0.8.0
   Compiling wayland-protocols-experimental v20250721.0.1
   Compiling wayland-protocols-misc v0.3.12
   Compiling smithay-client-toolkit v0.20.0
   Compiling gstreamer-audio v0.25.4
   Compiling moq-ice v0.1.0 (/var/cache/github-runner-work/moq/moq/rs/moq-ice)
   Compiling uniffi_pipeline v0.32.2
   Compiling clap v4.6.7
   Compiling uniffi_meta v0.32.2
   Compiling smithay-clipboard v0.7.3
   Compiling cbindgen v0.29.4
   Compiling rind-object-store v0.1.2
   Compiling arboard v3.7.0
   Compiling egui-wgpu v0.36.2
   Compiling egui-winit v0.36.2
   Compiling moq-c v0.7.0 (/var/cache/github-runner-work/moq/moq/rs/moq-c)
   Compiling uniffi_macros v0.32.2
   Compiling moq-shaper v0.0.1 (/var/cache/github-runner-work/moq/moq/rs/moq-shaper)
   Compiling proptest v1.12.0
   Compiling uniffi v0.32.2
   Compiling eframe v0.36.2
   Compiling moq-json v0.5.8 (/var/cache/github-runner-work/moq/moq/rs/moq-json)
   Compiling moq-loc v0.2.19 (/var/cache/github-runner-work/moq/moq/rs/moq-loc)
   Compiling qmux v0.7.0 (/var/cache/github-runner-work/moq/moq/rs/qmux)
   Compiling moq-archive v0.0.11 (/var/cache/github-runner-work/moq/moq/rs/moq-archive)
   Compiling hang v0.21.11 (/var/cache/github-runner-work/moq/moq/rs/hang)
   Compiling moq-stats v0.2.12 (/var/cache/github-runner-work/moq/moq/rs/moq-stats)
   Compiling moq-tokio v0.19.23 (/var/cache/github-runner-work/moq/moq/rs/moq-tokio)
   Compiling moq-mux v0.10.11 (/var/cache/github-runner-work/moq/moq/rs/moq-mux)
   Compiling moq-relay v0.17.2 (/var/cache/github-runner-work/moq/moq/rs/moq-relay)
   Compiling moq-video v0.1.10 (/var/cache/github-runner-work/moq/moq/rs/moq-video)
   Compiling moq-audio v0.1.10 (/var/cache/github-runner-work/moq/moq/rs/moq-audio)
   Compiling moq-hls v0.5.11 (/var/cache/github-runner-work/moq/moq/rs/moq-hls)
   Compiling moq-rtc v0.3.12 (/var/cache/github-runner-work/moq/moq/rs/moq-rtc)
   Compiling moq-rtmp v0.3.11 (/var/cache/github-runner-work/moq/moq/rs/moq-rtmp)
   Compiling moq-rtsp v0.1.0 (/var/cache/github-runner-work/moq/moq/rs/moq-rtsp)
warning: associated function `new` is never used
  --> rs/moq-relay/src/auth/caps.rs:91:16
   |
89 | impl Pacer {
   | ---------- associated function in this implementation
90 |     /// Pace a live connection by calling `apply` with each new set of caps.
91 |     pub(crate) fn new(apply: impl Fn(Caps) + Send + Sync + 'static) -> Self {
   |                   ^^^
   |
   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default

   Compiling moq-srt v0.3.11 (/var/cache/github-runner-work/moq/moq/rs/moq-srt)
   Compiling moq-scene v0.1.0 (/var/cache/github-runner-work/moq/moq/rs/moq-scene)
   Compiling moq-gst v0.4.12 (/var/cache/github-runner-work/moq/moq/rs/moq-gst)
   Compiling moq-carla-bridge v0.1.0 (/var/cache/github-runner-work/moq/moq/demo/carla/bridge)
error: `moq-relay` (lib) generated 1 warning
error: warnings are denied by `build.warnings` configuration
warning: build failed, waiting for other jobs to finish...
      Timing report saved to /var/cache/github-runner-work/moq/moq/target/cargo-timings/cargo-timing-20261102T110748957Z-efcac1b57bcf5093.html
error: command `/nix/store/85lxjwg78jw6rf7pqkf3vcq6291nrlfh-cargo-1.98.1-x86_64-unknown-linux-gnu/bin/cargo '--color=auto' test --no-run --message-format json-render-diagnostics --package 'path+file:///var/cache/github-runner-work/moq/moq/demo/carla/bridge#moq-carla-bridge@0.1.0' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/hang#0.21.11' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-audio#0.1.10' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-boy#0.5.12' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-c#0.7.0' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-cli#0.14.2' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-ffi#0.4.12' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-gst#0.4.12' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-hls#0.5.11' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-mux#0.10.11' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-rtc#0.3.12' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-rtmp#0.3.11' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-rtsp#0.1.0' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-scene#0.1.0' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-srt#0.3.11' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-studio#0.1.0' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-transcode#0.1.10' --package 'path+file:///var/cache/github-runner-work/moq/moq/rs/moq-video#0.1.10' --package moq-video --package moq-audio --tests --features 'moq-video/capture moq-audio/capture moq-audio/playback moq-cli/play moq-cli/openh264' --timings --locked` exited with code 101
mbx[cache]: object cache: 75 hits, 24 misses, 4 not looked up, 2 bypassed; 0 B downloaded, 0 B uploaded, 1.3 GiB stored locally
mbx[cache]: 1m 12s session; 3m 7s estimated compiler time avoided (summed across compilations)
mbx[cache]: 4 compilations had no usable prior inputs or matching prediction for a lookup
mbx[cache]: bypass reasons: 2 unsupported-crate-type
mbx[cache]: Cargo artifact reuse and CI cache archive transfers are not included above
mbx[savings]: 8d 5h saved across 11727 builds. put it toward something with a progress bar.
error: recipe `test` failed on line 284 with exit code 101
error: recipe `test-changed` failed on line 82 with exit code 101
##[endgroup]
ci: seconds per module
    62  check rs
    73  test rs (failed)
    13  check markdown
     8  check gh
    58  test gh
     0  check drill
     2  check quest
    19  check shell
     0  check large_files
     1  check toml
     0  check nix
     0  check justfile
   136  wall time
error: recipe `ci` failed on line 107 with exit code 101
##[error]ci: test rs failed
##[error]Process completed with exit code 101.
##[group]Run actions/upload-artifact@cf430e030ddbb5b0abf93d22962f4752f3646cd9
with:
  name: cargo-timings
  path: target/cargo-timings/cargo-timing-*.html
  if-no-files-found: ignore
  retention-days: 14
  compression-level: 6
  overwrite: false
  include-hidden-files: false
  archive: true
env:
  BASE: b1d70e717d188c87ee0867d8647cce0a9d3169fd
  CHECK_FAIL_FAST: 1
  NEXTEST_TEST_THREADS: 24
  MBX_CACHE_LINKS: 1
  MBX_REMOTE_URL: 
##[endgroup]
With the provided path, there will be 4 files uploaded
Artifact name is valid!
Root directory input is valid!
Uploading artifact: cargo-timings.zip
Beginning upload of artifact content to blob storage
Uploaded bytes 239615
Finished uploading artifact content to blob storage!
SHA256 digest of uploaded artifact is 066e75e59a5ed7c2cf9ffe6bb9f376366154aee7d71fdcf7c4ccf85cde0c5d2e
Finalizing artifact upload
Artifact cargo-timings successfully finalized. Artifact ID 13135273055
Artifact cargo-timings has been successfully uploaded! Final size is 239615 bytes. Artifact ID is 13135273055
Artifact download URL: https://github.com/moq-dev/moq/actions/runs/41434106320/artifacts/13135273055
Post job cleanup.
##[start-action display=Run jdx/mr-boxington-action@47ce49b32025d93a7a2f4570815afaa2b7092240;id=__04b46462-1c62-4c4a-9907-dec19e16b759.mbx]
##[end-action id=__04b46462-1c62-4c4a-9907-dec19e16b759.mbx;outcome=skipped;conclusion=skipped;duration_ms=0]
Post job cleanup.
[command]/nix/store/lg46w7hrjx7kylsh6645c9l975i8h43b-git-2.55.0/bin/git version
git version 2.55.0
Temporarily overriding HOME='/var/cache/github-runner-work/_temp/38918b1f-e1ad-4125-b185-ff70cc09f2e9' before making global git config changes
Adding repository directory to the temporary git global config as a safe directory
[command]/nix/store/lg46w7hrjx7kylsh6645c9l975i8h43b-git-2.55.0/bin/git config --global --add safe.directory /var/cache/github-runner-work/moq/moq
Removing SSH command configuration
[command]/nix/store/lg46w7hrjx7kylsh6645c9l975i8h43b-git-2.55.0/bin/git config --local --name-only --get-regexp core\.sshCommand
[command]/nix/store/lg46w7hrjx7kylsh6645c9l975i8h43b-git-2.55.0/bin/git submodule foreach --recursive sh -c "git config --local --name-only --get-regexp 'core\.sshCommand' && git config --local --unset-all 'core.sshCommand' || :"
Removing HTTP extra header
[command]/nix/store/lg46w7hrjx7kylsh6645c9l975i8h43b-git-2.55.0/bin/git config --local --name-only --get-regexp http\.https\:\/\/github\.com\/\.extraheader
[command]/nix/store/lg46w7hrjx7kylsh6645c9l975i8h43b-git-2.55.0/bin/git submodule foreach --recursive sh -c "git config --local --name-only --get-regexp 'http\.https\:\/\/github\.com\/\.extraheader' && git config --local --unset-all 'http.https://github.com/.extraheader' || :"
Removing includeIf entries pointing to credentials config files
[command]/nix/store/lg46w7hrjx7kylsh6645c9l975i8h43b-git-2.55.0/bin/git config --local --name-only --get-regexp ^includeIf\.gitdir:
[command]/nix/store/lg46w7hrjx7kylsh6645c9l975i8h43b-git-2.55.0/bin/git submodule foreach --recursive git config --local --show-origin --name-only --get-regexp remote.origin.url
A job completed hook has been configured by the self-hosted runner administrator
##[group]Run '/nix/store/gx2v6q84b0w43bafm0whkdx93qyxbpps-ci-cache-gc.sh/bin/ci-cache-gc.sh'
shell: /nix/store/1mv3qz005gkbalxfghk4y3s8ayv4d2dl-bash-interactive-5.3p15/bin/bash --noprofile --norc -e -o pipefail {0}
##[endgroup]
evicted 128 objects and 34 action results (1.4 GiB logical); 49.8 GiB logical remain
dropped 2 stale checkout records
dropped 6 session event streams
removed 0 learned incremental units and 2 checkout directories (3.7 KiB logical); 140 units (4.7 GiB logical) remain
evicted 0 objects and 0 action results (0 B logical); 49.8 GiB logical remain
removed 2 target directories (13.7 MiB logical, 2 abandoned and 0 live); 16.7 GiB logical remain
Cleaning up orphan processes

(written by quest land watch)

moq-bot · 2026-11-02T11:17:20Z

codex / Codex land fixer note:

The failure comes from relay code already on base, which this PR does not modify. No PR blame is assigned. The PR merges cleanly with base; its branch remains at the pinned head.

Failure log excerpts:

1016: warning: associated function new is never used
1017: --> rs/moq-relay/src/auth/caps.rs:91:16
1031: error: moq-relay (lib) generated 1 warning
1032: error: warnings are denied by build.warnings configuration

On a detached merge with base, CARGO_BUILD_WARNINGS=deny cargo check --locked -p moq-relay --no-default-features reproduced that warning and failed. CARGO_BUILD_WARNINGS=deny cargo test --locked -p moq-mux --tests passed: 1961 passed, 3 ignored, including an_unmarked_step_keeps_the_export_rendering. The broader command LOCAL_SUPERVISED=1 bash sh/rs/select.sh test /tmp/quest-7221-paths failed locally with "The system library alsa required by crate alsa-sys was not found." ALSA exists in the Nix store but was absent from the package search path.

The required checks cannot pass as supplied, so this is a handback for base lint repair and a fresh validation run.

(written by codex / Codex)

moq-bot · 2026-11-02T11:17:22Z

codex / Codex land fixer: CARGO_BUILD_WARNINGS=deny cargo check --locked -p moq-relay --no-default-features failed: "warning: associated function `new` is never used" at rs/moq-relay/src/auth/caps.rs:91; "error: warnings are d. Recommendation: Fi·x the base relay constructor lint for builds without QUIC listener features, then rerun the selected Rust tests and retry this unchanged PR.

warning: associated function `new` is never used
  --> rs/moq-relay/src/auth/caps.rs:91:16
   |
89 | impl Pacer {
   | ---------- associated function in this implementation
90 |     /// Pace a live connection by calling `apply` with each new set of caps.
91 |     pub(crate) fn new(apply: impl Fn(Caps) + Send + Sync + 'static) -> Self {
   |                   ^^^
   |
   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default

   Compiling moq-srt v0.3.11 (/var/cache/github-runner-work/moq/moq/rs/moq-srt)
   Compiling moq-scene v0.1.0 (/var/cache/github-runner-work/moq/moq/rs/moq-scene)
   Compiling moq-gst v0.4.12 (/var/cache/github-runner-work/moq/moq/rs/moq-gst)
   Compiling moq-carla-bridge v0.1.0 (/var/cache/github-runner-work/moq/moq/demo/carla/bridge)
error: `moq-relay` (lib) generated 1 warning
error: warnings are denied by `build.warnings` configuration

(written by codex / Codex)

#7539 landed, so quic-lb-forward-extras drops its Required on the deleted relay-quic-lb-forward quest. Follow-ups that extend still-open quest PRs now require them: ts-small-step-back (#7221), quic-long-type (#7492), and ts-idle-jitter (#7504). release-fanout-bench notes #7493 landed. Apply the pending edits whose PRs have landed: lite-07 ranges drops its fetch-range Required (#7545 landed the miss judging and cached backfill) and records #7207's range-identity question; quic-lock-contention records #7531's recommendation to keep the Mutex and RefCell. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

# Conflicts: # quest/m1/ts-reliability/README.md

…ves it A TS export counts an unmarked step back of more than its delay as a restart only where a reorder bound proves the frame falls outside valid reordering: audio, which never reorders, and video that follows more frames than its catalog `reorder` depth declares. Video that declares no depth is left untouched, so a slow, deep B-frame stream is never mistaken for a step (maintainer decision 2026-11-03). Drops the time bounds the inferred clock lent the check (its observed reach, the SPS lookahead and the catalog jitter), which only guessed, and the `DecodeClock::reach` accessor they needed. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

kixelated · 2026-11-04T00:26:41Z

Design change: an unmarked step back is now detected only where a reorder bound proves the frame falls outside valid reordering (maintainer decision 2026-11-03).

Video counts a step only when its rendition declares a catalog reorder, and the frame follows more frames than that depth in presentation order (DeclaredClock::reorders_past), more than the export's delay below the highest PTS on the timeline.
Video with no declared reorder is left untouched: no detection, no rewrite, no error. The inferred clock's time bounds (its observed reach, the SPS lookahead, the catalog jitter) are gone from the check, because they could only guess, and so is the DecodeClock::reach accessor.
Audio never reorders, so a step back of more than the delay still counts, as before.

This settles the pullfrog finding on an undeclared deep B-pyramid. An undeclared rendition can no longer fabricate a restart, because it is never checked. undeclared_reordering_never_steps_back pins the reproduced 0, 1600, 800 ms case at a 500 ms delay, plus a −560 ms step, both at zero steps.

A step back within the delay stays out of scope here. quest/m1/ts-small-step-back.md owns it and is now unblocked.

(Written by Claude Opus 5.5)

kixelated

Automated review by review (OpenAI)

Reviewed head: d350999

The revised detector addresses the earlier undeclared B-pyramid concern: it no longer synthesizes a video restart without a declared reorder depth, and the new cases cover both valid deep reordering and an undeclared step. No additional actionable finding in the changed detector. This is consistent with the recorded maintainer decision; automatic recovery for undeclared video and steps within the delay remain outside this change.

Verification: GitHub-only static review of the detector, decode-clock reset, base-aware changes and regression cases. I did not run the tests or reproduce the timing behavior.

(Written by review, OpenAI)

pullfrog

✅ No new issues found.

Reviewed changes

Step detection limited to a proven bound — Track::steps_back now counts a frame as a synthetic marker only when it is more than delay below the highest PTS under the same restart and a reorder bound rules out valid reordering: always for non-video (audio never reorders), and for Kind::Video only when the catalog declares reorder and DeclaredClock::reorders_past says the frame exceeds it.
Undeclared video is untouched — no detection, rewrite, or error, which resolves the earlier undeclared B-pyramid false restart.
Restart path reuse — steps joins pending.restart/pending.skip so the recovery gap is unchanged, and queue's restart branch now clears keyframe/leading_floor so frames after the step are not judged against the timeline left behind.
reorders_past factored out — DeclaredClock::push's depth test is shared (behavior-preserving).
Tests — a_declared_reorder_bounds_a_step_back pins the four depth-2 cases, undeclared_reordering_never_steps_back pins the untouched path, and an_unmarked_step_keeps_the_export_rendering now covers the declared −560 ms step on both clocks at three audio lags.
Quest — deletes the finished step-back.md, records the maintainer decision in the epic, and unblocks ts-small-step-back.md.

I traced the restart counter (base.0 + source.markers() + steps), the high gate across markers, resubscribe (base absorbs old markers), rebind (continuing preserves them), and the mid-group reset to the inferred clock; the synthetic restart is observed once and keeps loss-recovery accounting unchanged. Steps within the delay and undeclared video remain out of scope as documented.

^{｜ View workflow run ｜ Using deepseek-v4.1-flash-1017 (free via Pullfrog for OSS) ｜ 𝕏}

moq-bot · 2026-11-04T01:15:50Z

quest land watch: the merge queue removed this pull request at d350999 because it conflicts with main (merge_conflict).

The land fixer works on it in the background, and the watcher re-enqueues it at the back of the queue once it is fixed or judged flaky, or hands it back here with what it needs.

(written by quest land watch)

moq-bot · 2026-11-04T01:16:29Z

quest land watch: armed auto-merge on this pull request at 6e0c077, so it joins the back of the merge queue once its required checks pass, with main at 55d5a14 merged in by the quest merge driver.

(written by quest land watch)

kixelated and others added 5 commits October 28, 2026 23:14

chore(quest): claim quest/m1/ts-reliability/step-back.md

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Quest-Claim: 3fb3ded36f489fdf

Merge remote-tracking branch 'origin/main' into worktree-agent-a150b6…

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Merge remote-tracking branch 'origin/main' into worktree-agent-a150b6…

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kixelated changed the title ~~A small step back keeps the TS export's video~~ fix(mux): a TS export re-acquires on a small unmarked step back Nov 1, 2026

kixelated marked this pull request as ready for review November 1, 2026 23:26

kixelated commented Nov 1, 2026

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kixelated added the quest:merge label Nov 1, 2026

kixelated enabled auto-merge (squash) November 1, 2026 23:40

kixelated added this pull request to the merge queue Nov 2, 2026

github-merge-queue Bot removed this pull request from the merge queue due to failed status checks Nov 2, 2026

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github-merge-queue Bot removed this pull request from the merge queue due to failed status checks Nov 2, 2026

kixelated added the quest:active label Nov 2, 2026

Merge remote-tracking branch 'origin/main' into t3/7221-iterate

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kixelated marked this pull request as draft November 2, 2026 15:59

kixelated removed the quest:active label Nov 2, 2026

kixelated mentioned this pull request Nov 2, 2026

quest: plan follow-ups from the second 2026-11-01 /quest-complete round #7590

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kixelated mentioned this pull request Nov 3, 2026

feat(land): the watcher disables a test seen flaking twice in its own PR moq-dev/quest#406

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kixelated added the quest:active label Nov 3, 2026

kixelated and others added 3 commits November 3, 2026 15:58

Merge remote-tracking branch 'origin/main' into iterate-7221

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# Conflicts: # quest/m1/ts-reliability/README.md

Merge remote-tracking branch 'origin/main' into iterate-7221

d350999

kixelated changed the title ~~fix(mux): a TS export re-acquires on a small unmarked step back~~ fix(mux): a TS export re-acquires on an unmarked step back a reorder bound proves Nov 4, 2026

kixelated marked this pull request as ready for review November 4, 2026 00:27

kixelated removed the quest:active label Nov 4, 2026

kixelated added this pull request to the merge queue Nov 4, 2026

kixelated commented Nov 4, 2026

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kixelated mentioned this pull request Nov 4, 2026

fix(mux): flag skipped semantic media on the PCR #7785

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github-merge-queue Bot removed this pull request from the merge queue due to a conflict with the base branch Nov 4, 2026

quest land: merge tested base

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moq-bot Bot enabled auto-merge November 4, 2026 01:16

moq-bot Bot added this pull request to the merge queue Nov 4, 2026

Merged via the queue into main with commit c798f77 Nov 4, 2026
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moq-bot Bot deleted the quest/m1/ts-reliability/step-back branch November 4, 2026 02:37

This was referenced Nov 4, 2026

fix(mux): restart TS clocks on small proven backward steps #7799

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feat(land watch): only genuine flakes count toward disabling a test moq-dev/quest#468

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ℹ️ An undeclared deep B-pyramid can fabricate a restart

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kixelated commented Oct 29, 2026 •

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