Runway Act-Two came out in July 2025, powered by Gen-4 model. It's a strong AI motion-capture tool that takes movements from a video and adds them to a character image or clip. That includes gestures, face changes and background motion. You can pick the quality and file type too.
Act-Two adds background motion to any figure image by itself. It handles different angles, styles and even non-human figures. If you're using a character image, you can match the movements from your video.
Inputs and setup. You’ll need a video for the movement and either an image or clip of the figure.
Output sizes. 16:9 - 1280x720 9:16 - 720x1280 1:1 - 960x960 4:3 - 1104x832 3:4 - 832x1104 21:9 - 1584x672
Runs at 24 frames per second. If you use a character image, you can adjust the gestures to match your video.
If you'd like to access this model, you can explore the following possibilities:
