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Character Swap takes a source video and re-renders it so that a chosen character performs the same motion. It runs on our motion engine.

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Modes

std

Standard mode. Faster turnaround. Good default for previews and social clips.

pro

Pro mode. Higher fidelity motion, cleaner edges, slower render. Use for final output.

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Prompt guidance

Motion is inherited from the source video. The prompt controls style, framing, and character intent, not motion.
  • Keep prompts short and concrete: subject, wardrobe, lighting.
  • Avoid instructions about camera moves; those come from the source clip.
  • Do not describe actions already present in the source video.

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Character eligibility

Only characters marked public and platform-ready are selectable for video swap. Private or draft characters must be validated first via POST /v1/characters/{id}/validate.

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Sound

You can retain the original audio track or produce a silent output. Audio passes through untouched when retained.
For still images (portraits, thumbnails, marketing crops), use Image Swap instead.