LaVie

LaVie: High-Quality Video Generation with Cascaded Latent Diffusion Models

This repository is the official PyTorch implementation of LaVie.

LaVie is a Text-to-Video (T2V) generation framework, and main part of video generation system Vchitect.

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Installation

conda env create -f environment.yml 
conda activate lavie

Download Pre-Trained models

Download pre-trained models, stable diffusion 1.4, stable-diffusion-x4-upscaler to ./pretrained_models. You should be able to see the following:

├── pretrained_models
│   ├── lavie_base.pt
│   ├── lavie_interpolation.pt
│   ├── lavie_vsr.pt
│   ├── stable-diffusion-v1-4
│   │   ├── ...
└── └── stable-diffusion-x4-upscaler
        ├── ...

Inference

The inference contains Base T2V, Video Interpolation and Video Super-Resolution three steps. We provide several options to generate videos:

• Step1: 320 x 512 resolution, 16 frames
• Step1+Step2: 320 x 512 resolution, 61 frames
• Step1+Step3: 1280 x 2048 resolution, 16 frames
• Step1+Step2+Step3: 1280 x 2048 resolution, 61 frames

Feel free to try different options:)

Step1. Base T2V

Run following command to generate videos from base T2V model.

cd base
python pipelines/sample.py --config configs/sample.yaml

Edit text_prompt in configs/sample.yaml to change prompt, results will be saved under ./res/base.

Step2 (optional). Video Interpolation

Run following command to conduct video interpolation.

cd interpolation
python sample.py --config configs/sample.yaml

The default input video path is ./res/base, results will be saved under ./res/interpolation. In configs/sample.yaml, you could modify default input_folder with YOUR_INPUT_FOLDER in configs/sample.yaml. Input videos should be named as prompt1.mp4, prompt2.mp4, ... and put under YOUR_INPUT_FOLDER. Launching the code will process all the input videos in input_folder.

Step3 (optional). Video Super-Resolution

Run following command to conduct video super-resolution.

cd vsr
python sample.py --config configs/sample.yaml

The default input video path is ./res/base and results will be saved under ./res/vsr. You could modify default input_path with YOUR_INPUT_FOLDER in configs/sample.yaml. Smiliar to Step2, input videos should be named as prompt1.mp4, prompt2.mp4, ... and put under YOUR_INPUT_FOLDER. Launching the code will process all the input videos in input_folder.

BibTex

@article{wang2023lavie,
  title={LAVIE: High-Quality Video Generation with Cascaded Latent Diffusion Models},
  author={Wang, Yaohui and Chen, Xinyuan and Ma, Xin and Zhou, Shangchen and Huang, Ziqi and Wang, Yi and Yang, Ceyuan and He, Yinan and Yu, Jiashuo and Yang, Peiqing and others},
  journal={arXiv preprint arXiv:2309.15103},
  year={2023}
}

Acknowledgements

The code is buit upon diffusers and Stable Diffusion, we thank all the contributors for open-sourcing.

License

The code is licensed under Apache-2.0, model weights are fully open for academic research and also allow free commercial usage. To apply for a commercial license, please fill in the application form.