This checker looks for hallucinated movement in an augmented video. It compares movement masks between original and augmented videos, and detects new hallucinated moving objects, or removed moving objects in the augmented video. It answers the questions "Are there any new people, vehicles, or objects moving around the augmented video that weren't present in the original video, or whose motion was significantly altered by the augmentation? and Were any people, vehicles, or objects that were moving around in the original video that were removed from the augmented video?.

License may be found on GitHub: https://github.com/NVIDIA/cosmos-evaluator/blob/main/LICENSE