ugc-model-swap

Analyze source video and swap the on-camera subject via the ralphy pipeline.

118|12|Updated May 5, 2026
One-click install
npx skills add https://github.com/alecs5am/ralphy --skill ugc-model-swap
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: ugc-model-swap
Source: https://github.com/alecs5am/ralphy/tree/main/.agents/skills/ugc-model-swap
Command: npx skills add https://github.com/alecs5am/ralphy --skill ugc-model-swap

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

The craft specialist for the swap kind of remix. The user provides a source clip and a replacement person/character; this skill mirrors the source faithfully and changes only the on-camera subject. It enables rapid creation of multiple variants without re-rigging the entire scene.

Core Features & Use Cases

  • Single-continuous-scene prompt: describes the entire video as ONE flowing paragraph to preserve continuity.
  • Face-lock and composition rules: ensures the replacement character remains the focal point with the face always centered in the frame.
  • Prop and body-mechanics discipline: prescribes precise interaction with props and explicit, measurable movements to maintain realism.
  • Reference gating and safety: supports using a master reference for replacement and enforces policy when named real people are requested.
  • End-to-end workflow within ralphy: analyze source, select model, generate, render, and evaluate with the provided pipeline.

Quick Start

Provide a source clip and a replacement character, then run the single-continuous-scene prompt workflow.

Frequently Asked Questions about ugc-model-swap

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I swap an actor in a video while keeping the original background and props intact?▼

To swap an on-camera actor while keeping the background intact, you provide a source clip and a replacement character to generate a controlled subject replacement that preserves all original scene elements.

What is the best way to do a face swap on UGC video ads without breaking scene continuity?▼

The best way to do a face swap on UGC video ads is using a single-continuous-scene prompt that describes the entire video as one flowing paragraph, ensuring face-lock and composition rules maintain realism.

How do I use prompt engineering to keep a replacement character's face centered during a video swap?▼

To keep a replacement character's face centered during a video swap, apply face-lock and composition rules within your prompt structure to ensure the subject remains the focal point of the frame.

Can I generate video remixes of named real people using a face swap model?▼

You can generate video remixes of named real people, but the workflow enforces reference gating and strict safety policies when a replacement involves a real person to ensure compliant generation.

Why does my AI video subject replacement lose track of props and body mechanics?▼

Your AI video subject replacement loses track of props because it lacks prop and body-mechanics discipline, requiring explicit measurable movements and precise interaction descriptions in the prompt.

Do I need a master reference image to swap the on-camera subject in my source clip?▼

Yes, you need a master reference image for replacement to accurately mirror the source clip and swap only the on-camera subject while driving the scene through the generation pipeline.