This model enables mid-generation control of video generation using physics-grounded motion signals rather than pixel positions, making it possible to interactively steer object dynamics while the video is being generated.
PhysStream generates videos from images while letting you control object motion in real-time using physics-based signals. Instead of specifying exact positions, you provide velocity changes that the model interprets as physical dynamics. It uses scene memory (tracking where objects are) to maintain consistency across frames, enabling interactive control over multi-object scenes during generation.