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reverse-motion-system

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Updated 10-16 04:28

About this skill

The Reverse Motion System

Recreate pixel-perfect motion design from any reference video — by MEASURING it, not eyeballing it. Then flip the same system to render something entirely your own.

Every camera move, shape, colour and cut in the final prompt is a calculated value extracted with computer vision. You are never prompting blind.

Requirements

  • Python 3.10+ with opencv-python-headless and numpy (pip install opencv-python-headless numpy — use a venv if your system blocks pip)
  • The Higgsfield MCP connected to Claude Code (claude mcp add --transport http --scope user higgsfield https://mcp.higgsfield.ai/mcp)

The pipeline (run it in order)

Stage 1 — Measure the reference

python scripts/measure.py reference.mp4 -o spec.json

Computer vision reads every frame and pulls out:

  • Structure: cuts scored as frame-diff ratio against the local median, fitted black-window and white-flash detectors → the beat list
  • Camera: Farneback optical flow on lit pixels, solved per frame pair for a similarity transform (scale / rotation / translation) with physical admissibility guards → push-in, pull-back, pan, roll, per-frame values
  • Elements: connected-component blobs at each beat's midframe → shape class, normalized position and size
  • Palette: k-means over lit pixels per beat → locked hex values
  • Look: background floor, grain, bloom notes

spec.json is the contract. Later stages read it and never re-derive a number from pixels.

Stage 2 — Convert the spec into a structured prompt

python scripts/spec_to_prompt.py spec.json -o prompt.json --style "neon motion graphics on black"

Builds a shot-by-shot JSON video prompt: one shot per scene beat, transitions carried from the measured black/flash windows, camera phrased from the measured motion, palette locked to the measured hexes.

Stage 3 — Render through the Higgsfield MCP

Inside Claude Code, with the Higgsfield MCP connected, ask:

"Read prompt.json and generate this video on Higgsfield. Use the Google Omni model if it is available in the marketplace, otherwise Seedance 2.0. 9:16, 1080p, honor every shot duration, camera move and palette exactly."

The agent lists the available Higgsfield models, picks the conversational JSON-prompt model, fires the generation, polls the job, and returns the video URL.

Stage 4 — Your own sauce (the point of the system)

Copying proves the control. Now feed the system YOUR direction instead of a reference:

  • Edit spec.json directly — change palettes, swap camera moves, retime beats
  • Or keep a folder of reference clips (your inspiration bank), measure each one, and mix beats across specs into one prompt
  • Add your own custom shapes, fonts and camera moves by describing them in the shot descriptions

Then re-run stage 2 + 3. The render follows your numbers with the same precision it followed the reference's.

Rules for the agent

  1. NEVER skip the measurement stage and improvise a prompt — the measured values are the whole point.
  2. NEVER re-derive numbers from pixels after spec.json is written; edit the spec instead.
  3. If the Higgsfield MCP is not connected, stop and give the user the one-line install command above.
  4. Verify the model actually available on Higgsfield before claiming it (list models first; prefer Google Omni for JSON prompts, fall back to Seedance 2.0).
  5. Aspect ratio 9:16 and 1080p by default unless the user says otherwise.