Rerender A Video: Zero-Shot Text-Guided Video-to-Video Translation
Authors: name: Shuai Yang, name: Yifan Zhou, name: Ziwei Liu, name: Chen Change Loy

Large text-to-image diffusion models have exhibited impressive proficiency in
generating high-quality images. However, when applying these models to video
domain, ensuring temporal consistency across video frames remains a formidable
challenge. This paper proposes a novel zero-shot text-guided video-to-video
translation framework to adapt image models to videos. The framework includes
two parts: key frame translation and full video translation. The first part
uses an adapted diffusion model to generate key frames, with hierarchical
cross-frame constraints applied to enforce coherence in shapes, textures and
colors. The second part propagates the key frames to other frames with
temporal-aware patch matching and frame blending. Our framework achieves global
style and local texture temporal consistency at a low cost (without re-training
or optimization). The adaptation is compatible with existing image diffusion
techniques, allowing our framework to take advantage of them, such as
customizing a specific subject with LoRA, and introducing extra spatial
guidance with ControlNet. Extensive experimental results demonstrate the
effectiveness of our proposed framework over existing methods in rendering
high-quality and temporally-coherent videos.