StreamForce Enables Real-Time Physical Force Control for Streaming Video Generation

StreamForce is a new causal video generation framework that allows users to steer video dynamics in real time through continuous force inputs — both global (scene-wide) and local (object-level). Unlike prior approaches that require the full motion sequence to be specified upfront or train separate models per force type, StreamForce processes force signals on the fly as the video is being generated, reacting instantly to mid-stream changes in direction or magnitude.

The model reaches up to 16.6 FPS on a single GPU and demonstrates physically grounded behaviors — including falling, bouncing, mass-aware motion, and friction-aware motion — that emerge from its learned priors rather than explicit physics conditioning. In benchmark comparisons against Wan2.2 TI2V, Force-Prompting, and Kling Motion Brush, StreamForce claims state-of-the-art results on both force adherence and motion realism across local and global force scenarios.