Act-Two Technical Specifications
| Item | Verified information |
|---|---|
| Model name | Runway Act-Two |
| API model ID | act_two |
| Provider | Runway |
| Input/output | Performance video and character/reference assets; animated video output |
| Core task | Performance capture and character animation |
What Is Runway Act-Two?
Act-Two transfers the movement and delivery of a recorded performance to a character or visual asset. It is intended for expressive character animation and performance-driven video production.
Features and Highlights of Runway Act-Two
- Transfers body movement and acting cues from a driving performance.
- Supports character-focused animation rather than generic text-to-video.
- Useful for dialogue, gesture, and expressive scene blocking.
- Can accelerate avatar, game, and animated-film prototyping.
- Keeps creative control with the source performance and character design.
Act-Two Benchmark Performance
No standardized public benchmark score for act_two is published in the cited Runway sources. Evaluate motion fidelity, facial/gesture preservation, and temporal stability with fixed performances.
Runway Act-Two vs Gen-4 vs Aleph 2
| Model | Primary input | Best fit | Distinguishing workflow |
|---|---|---|---|
| Act-Two | Performance video and character asset | Character animation | Transfers acting and movement |
| Gen-4 | Prompt or visual reference | New-shot generation | Creates a new visual sequence |
| Aleph 2 | Existing video | Video editing and transformation | Applies prompt-directed edits |
Act-Two Limitations
Runway does not publish a universal duration, resolution, or context specification for this ID. Occlusion, unusual camera motion, and mismatched character anatomy can reduce transfer quality.
Runway Act-Two Use Cases
Use it for animated characters, virtual presenters, game cinematics, music-video performance tests, and rapid blocking of dialogue scenes.