MicroCinema: A Divide-and-Conquer Approach for Text-to-Video Generation
Authors: Yanhui Wang, Jianmin Bao, Wenming Weng, Ruoyu Feng, Dacheng Yin, Tao Yang, Jingxu Zhang, Qi Dai, Zhiyuan Zhao, Chunyu Wang, Kai Qiu, Yuhui Yuan, Xiaoyan Sun, Chong Luo, Baining Guo

We present MicroCinema a straightforward yet effective framework for high-quality and coherent text-to-video generation. Unlike existing approaches that align text prompts with video directly MicroCinema introduces a Divide-and-Conquer strategy which divides the text-to-video into a two-stage process: text-to-image generation and image&text-to-video generation. This strategy offers two significant advantages. a) It allows us to take full advantage of the recent advances in text-to-image models such as Stable Diffusion Midjourney and DALLE to generate photorealistic and highly detailed images. b) Leveraging the generated image the model can allocate less focus to fine-grained appearance details prioritizing the efficient learning of motion dynamics. To implement this strategy effectively we introduce two core designs. First we propose the Appearance Injection Network enhancing the preservation of the appearance of the given image. Second we introduce the Appearance Noise Prior a novel mechanism aimed at maintaining the capabilities of pre-trained 2D diffusion models. These design elements empower MicroCinema to generate high-quality videos with precise motion guided by the provided text prompts. Extensive experiments demonstrate the superiority of the proposed framework. Concretely MicroCinema achieves SOTA zero-shot FVD of 342.86 on UCF-101 and 377.40 on MSR-VTT.