Controllability, temporal coherence, and detail synthesis remain the most critical challenges in video generation. In this paper, we focus on a commonly used yet underexplored cinematic technique known as Frame In and Frame Out. Specifically, starting from image-to-video generation, users can control the objects in the image to naturally leave the scene or provide breaking new identity references to enter the scene, guided by a user-specified motion trajectory. To support this task, we introduce a new dataset that is curated semi-automatically, an efficient identity-preserving motion-controllable video Diffusion Transformer architecture, and a comprehensive evaluation protocol targeting this task. Our evaluation shows that our proposed approach significantly outperforms existing baselines.
@article{arxiv.2505.21491,
title = {Frame In-N-Out: Unbounded Controllable Image-to-Video Generation},
author = {Boyang Wang and Xuweiyi Chen and Matheus Gadelha and Zezhou Cheng},
journal= {arXiv preprint arXiv:2505.21491},
year = {2025}
}