{
  "id": "extend-mechanisms",
  "title": "More seconds. The same scene?",
  "date": "October 21–November 1, 2026",
  "scope": "Two completed October 28 deliveries, with earlier failed and partial mechanism comparisons kept in the finding. October 31: one matched-source 20-step and one two 4-second visual Relay candidate, one attempt each; original14-step result reused.",
  "changes": [
    [
      "Source prefix",
      "8 seconds, original audio",
      "Same saved source"
    ],
    [
      "Additional footage",
      "+8 seconds",
      "+16 seconds"
    ],
    [
      "Delivered length",
      "16 seconds",
      "24 seconds"
    ],
    [
      "Added soundtrack",
      "Silent after original ends",
      "Silent after original ends"
    ]
  ],
  "details": [
    [
      "Frame accounting",
      "Original 8s = 192 frames at 24fps; outputs 384 and 576 frames"
    ],
    [
      "Source dimensions",
      "942 × 1374; model canvas 896 × 1312"
    ],
    [
      "Audio evidence",
      "Original-audio alignment measured on the prefix; no generated tail soundtrack. Measurement does not establish lip sync."
    ],
    [
      "Earlier comparison",
      "Source/Director/relay examples included held source frames for comparison; a held frame is not source motion beyond the original clip."
    ],
    [
      "Hardware and timing limits",
      "NVIDIA B200 in the saved completed Extend run detail; the +8s job reused the +16s worker."
    ],
    [
      "October 31 quality finding",
      "20 steps did not show a convincing face/hand/clothing gain. Two 4-second sections retained turns, with remaining distortions; one source cannot establish equivalent quality."
    ],
    [
      "October 31 warm comparison",
      "14-step single 8s:7m57s/$1.3813; two4s:6m45s/$1.1729 (about 15% lower complete warm time and charge). Both B200; startup and queue separate."
    ],
    [
      "October 31 20-step run",
      "14m42s/$2.1345 including cold startup; sampling 569.883s versus saved 14-step 420.529s. More work did not establish better quality."
    ],
    [
      "Availability distinction",
      "These visual Relay quality candidates remain private experiments. The current new-draft default is Director-style native-guide22, not the saved visual Relay control."
    ],
    [
      "Original-appearance follow-up status",
      "Three completed files are preserved: stage fixed-original16s ($1.6798), landscape moving-reference28.5s ($0.6402), and landscape fixed-original28.5s on RTX PRO6000 96GB ($0.2679). Turns continue, but fixed appearance did not consistently repair hair, faces or hands. The new follow-up files are not distributed as public previews on this page."
    ],
    [
      "November 1 priced GPU observation",
      "The final RTX96 job completed in6m50s from allocation, or7m28s after Generate, with a confirmed$0.2679 Studio debit. Its engine took170.395s versus134.212s for the saved moving-reference B200 job. Hardware, conditioning and cold/warm state differ; this is not a controlled hardware-speed or quality-parity benchmark. The provider day report confirms$0.2883 for this exact pod. The historical Studio debit missed112 seconds of allocated startup and under-collected about2¢ versus supplier cost. A future-only clock correction is prepared locally; the old charge will not change. Do not use that debit as an expected future price."
    ],
    [
      "November 1 quality decision",
      "Keep the single8-second saved control as the stronger hairstyle example. The4+4 options remain experiments: motion survives, but hair shape pops/inflates and face/hand artifacts remain. A lower hourly machine rate is a separate choice from the generation recipe."
    ]
  ],
  "configurationFormat": "Study settings summary; not an importable ComfyUI workflow. Requires the private ModelPilot runtime/nodes and separately licensed model weights.",
  "currentAccess": "Signed-in customers can add 4 or 8 seconds in Studio and keep original sound over the source portion. The added footage is silent. The 24-second result shown here is a longer research example, not an available +16-second option. Review the current method, quote and spending limit before Generate.",
  "prompt": null,
  "sources": [
    {
      "label": "Patricia Stephan, TAF German Bellydance National Championship 2024 — Dance",
      "author": "Shark1989z",
      "url": "https://commons.wikimedia.org/wiki/File:Patricia_Stephan_TAF_German_Bellydance_National_Championship,_2024_-_Dance.webm",
      "license": "https://creativecommons.org/licenses/by-sa/4.0/",
      "changes": "Excerpt from original 25s onward; resampled/prepared for the saved test; audio omitted from public previews. AI-generated extensions are adaptations, not new footage of Patricia Stephan. Copyright permission record: Wikimedia VRT ticket 2024112010013196."
    }
  ],
  "mediaNote": "AI-generated outputs are identified in each comparison. Public previews omit source audio where present; visual streams are unchanged. Original test files and audio measurements remain preserved. No performer or photographer endorses ModelPilot.",
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  "workflowGraphs": []
}