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feat(six-encounters): deterministic audiovisual rendition export with receipt - #72
Adds rendition.js and export-rendition.cjs: a seeded run is driven through the real RouteSession at the configured durations and rendered to rendition.mp4 (H.264/AAC), cue-track.wav and receipt.json (SHA-256 of the raw frame stream and cue track, ffprobe readback). Schematic rendition of the route words only, not the browser artwork; no acceptance claimed.
Local gates: python3 scripts/verify.py exit 0; node --test tests/ace-*.test.mjs 8 pass; validate-ace-manifest exit 0; experimental npm test 63 pass (7 new in tests/rendition.test.cjs, including an end-to-end decode).
Add a deterministic seeded rendition export with reproducible audiovisual artifacts and an accompanying verification receipt.
New Features:
Add deterministic audiovisual rendition export for seeded route runs, producing an H.264/AAC video, cue-track WAV, and verification receipt.
Render route words with seed-derived palette, motion, direction, and glyph-cell behaviour while driving the real session timings.
Enhancements:
Record encoder-independent frame and audio hashes alongside decoded media metadata for reproducibility and artifact verification.
Documentation:
Document the rendition export workflow, generated artifacts, and its schematic/non-acceptance scope.
Tests:
Add coverage for legal deterministic routing, rendering, palette contrast, WAV output, layout bounds, CLI validation, reproducibility, failure handling, and end-to-end media decoding.
Summary by CodeRabbit
New Features
Added an experimental audiovisual export for seeded generative runs, producing an MP4 video, a cue-track WAV, and a JSON receipt with run and output details.
Export settings let you choose the seed, number of encounters, frame rate, and video dimensions.
Documentation
Added guidance on using the exporter, its requirements, output, and limitations.
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The change adds deterministic simulation and rendering for seeded route encounters. A command-line exporter produces a cue-track WAV, an H.264/AAC MP4, and a JSON receipt. Tests cover rendition output, CLI validation, media export, and encoder failure handling.
Changes: Audiovisual rendition export
Layer / File(s)
Summary
Simulate and render route encounters experimental/six-encounters/rendition.js, experimental/six-encounters/tests/rendition.test.cjs
The rendition module simulates seeded route encounters and generates RGB frames, cue audio, and WAV data. Tests check simulation, frame rendering, cues, and route-word layout.
Encode and record rendition export experimental/six-encounters/export-rendition.cjs, experimental/six-encounters/tests/rendition.test.cjs, experimental/six-encounters/package.json, experimental/six-encounters/README.md
The CLI validates options, encodes the frames and cue audio, probes the MP4, and writes a JSON receipt. Tests check parsing, export output, and encoder failure handling. The README documents the command and outputs.
sequenceDiagram
participant CLI
participant exportRendition
participant HLRendition
participant ffmpeg
participant ffprobe
participant Receipt
CLI->>exportRendition: pass parsed options
exportRendition->>HLRendition: simulate run and generate frames and cue track
exportRendition->>ffmpeg: stream RGB frames and encode MP4
exportRendition->>ffprobe: inspect MP4 streams
exportRendition->>Receipt: write run data, media metadata, and hashes
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Merge Risk: Low · previous review 654d5
The new exporter can leave a stale receipt.json beside a replaced cue-track.wav when a repeat export into the same directory fails. Normal exports and the added tests are unaffected. This is a small, localized risk in experimental tooling, so the change is mergeable with a follow-up fix.
Pre-merge checks: 4
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Explanation
Description Check
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Title check
The title 'feat(six-encounters): deterministic audiovisual rendition export with receipt' matches the main change. The PR adds a seeded, deterministic exporter that writes an MP4, a cue-track WAV, and…
Linked Issues check
[#71] Deliverable: a deterministic exporter that replays a seeded word-routed run into frames, a cue track, and an H.264/AAC file with a receipt, plus tests that decode the output. The change set cove…
Out of Scope Changes check
All changed files relate to the #71 deliverable: rendition.js (rendering, cue track, WAV), export-rendition.cjs (CLI and export pipeline), tests/rendition.test.cjs (tests for these modules), package.j…
Full details: Title check
Explanation
The title 'feat(six-encounters): deterministic audiovisual rendition export with receipt' matches the main change. The PR adds a seeded, deterministic exporter that writes an MP4, a cue-track WAV, and a JSON receipt. The scope prefix names the affected experiment. The title is specific and concise, and it is a single sentence without file lists or vague terms.
Full details: Linked Issues check
Explanation
[#71] Deliverable: a deterministic exporter that replays a seeded word-routed run into frames, a cue track, and an H.264/AAC file with a receipt, plus tests that decode the output. The change set covers each part. rendition.js simulates runs through RouteSession and renders route words into RGB frames and phase-boundary tone cues, with WAV output. export-rendition.cjs hashes raw frames, writes cue-track.wav, encodes H.264/AAC MP4 via ffmpeg, probes it with ffprobe, and writes receipt.json. tests/rendition.test.cjs includes an end-to-end decode test that checks codec, digest, duration, and decoded color. Seed defaults and validation support reproducibility. The schematic scope (public route words, not browser artwork) matches the issue. The issue also says evaluateC3GenerativeStudioAndEditions defaults renditionExport.audiovisualTrackExported to true. The stated deliverable does not require changing that flag, and the change list does not modify concentric-evolution.js. This is noted, not treated as a failure. Evidence comes from the PR summary and change list; I did not run the tests or inspect the source hunks.
Full details: Out of Scope Changes check
Explanation
All changed files relate to the #71 deliverable: rendition.js (rendering, cue track, WAV), export-rendition.cjs (CLI and export pipeline), tests/rendition.test.cjs (tests for these modules), package.json (adds the new test file to the test script), and the README section documenting the exporter. The commit messages describe fixes for encoder-failure diagnostics and glyph scaling in the same rendering path. No unrelated change is identified in the change summary. Evidence comes from the summary and change list; I did not inspect the hunks.
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Actionable comments posted: 1
Fix comments: Fix CodeRabbit comments on this PR
Prompt to fix all issues
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Inline comments:
Review comments at @experimental/six-encounters/export-rendition.cjs:
- Line 31: Update the export flow around fs.writeFileSync so the previous
receipt cannot remain valid after any artifact is replaced: invalidate
receipt.json before the first overwrite, or stage the outputs and publish them
only after ffmpeg encoding succeeds. Preserve the receipt’s validity for the
prior export until staged outputs are ready if using the staging approach.
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Closes #71.
Adds rendition.js and export-rendition.cjs: a seeded run is driven through the real RouteSession at the configured durations and rendered to rendition.mp4 (H.264/AAC), cue-track.wav and receipt.json (SHA-256 of the raw frame stream and cue track, ffprobe readback). Schematic rendition of the route words only, not the browser artwork; no acceptance claimed.
Local gates: python3 scripts/verify.py exit 0; node --test tests/ace-*.test.mjs 8 pass; validate-ace-manifest exit 0; experimental npm test 63 pass (7 new in tests/rendition.test.cjs, including an end-to-end decode).
🤖 Generated with Claude Code
Summary by Sourcery
Add a deterministic seeded rendition export with reproducible audiovisual artifacts and an accompanying verification receipt.
New Features:
Enhancements:
Documentation:
Tests:
Summary by CodeRabbit