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This repo contains PyTorch model definitions, pre-trained weights and inference/sampling code for our paper exploring HunyuanVideo. You can find more visualizations on our project page.
HunyuanVideo: A Systematic Framework For Large Video Generation Model
demo.mp4
The video is heavily compressed to comply with GitHub's policy. The high-quality version can be downloaded from here.
- Dec 7, 2024: 🚀 We release the parallel inference code for HunyuanVideo powered by xDiT.
- Dec 3, 2024: 🤗 We release the inference code and model weights of HunyuanVideo.
- HunyuanVideo (Text-to-Video Model)
- Inference
- Checkpoints
- Multi-gpus Sequence Parallel inference (Faster inference speed on more gpus)
- Web Demo (Gradio)
- Diffusers
- Penguin Video Benchmark
- ComfyUI
- Multi-gpus PipeFusion inference (Low memory requirements)
- HunyuanVideo (Image-to-Video Model)
- Inference
- Checkpoints
- HunyuanVideo: A Systematic Framework For Large Video Generation Model
- 🎥 Demo
- 🔥🔥🔥 News!!
- 📑 Open-source Plan
- Contents
- Abstract
- HunyuanVideo Overall Architecture
- 🎉 HunyuanVideo Key Features
- 📈 Comparisons
- 📜 Requirements
- 🛠️ Dependencies and Installation
- 🧱 Download Pretrained Models
- 🔑 Single-gpu Inference
- 🚀 Parallel Inference on Multiple GPUs by xDiT
- 🔗 BibTeX
- 🧩 Projects that use HunyuanVideo
- Acknowledgements
- Star History
We present HunyuanVideo, a novel open-source video foundation model that exhibits performance in video generation that is comparable to, if not superior to, leading closed-source models. In order to train HunyuanVideo model, we adopt several key technologies for model learning, including data curation, image-video joint model training, and an efficient infrastructure designed to facilitate large-scale model training and inference. Additionally, through an effective strategy for scaling model architecture and dataset, we successfully trained a video generative model with over 13 billion parameters, making it the largest among all open-source models.
We conducted extensive experiments and implemented a series of targeted designs to ensure high visual quality, motion diversity, text-video alignment, and generation stability. According to professional human evaluation results, HunyuanVideo outperforms previous state-of-the-art models, including Runway Gen-3, Luma 1.6, and 3 top-performing Chinese video generative models. By releasing the code and weights of the foundation model and its applications, we aim to bridge the gap between closed-source and open-source video foundation models. This initiative will empower everyone in the community to experiment with their ideas, fostering a more dynamic and vibrant video generation ecosystem.
HunyuanVideo is trained on a spatial-temporally compressed latent space, which is compressed through a Causal 3D VAE. Text prompts are encoded using a large language model, and used as the conditions. Taking Gaussian noise and the conditions as input, our generative model produces a output latent, which is then decoded to images or videos through the 3D VAE decoder.
HunyuanVideo introduces the Transformer design and employs a Full Attention mechanism for unified image and video generation. Specifically, we use a "Dual-stream to Single-stream" hybrid model design for video generation. In the dual-stream phase, video and text tokens are processed independently through multiple Transformer blocks, enabling each modality to learn its own appropriate modulation mechanisms without interference. In the single-stream phase, we concatenate the video and text tokens and feed them into subsequent Transformer blocks for effective multimodal information fusion. This design captures complex interactions between visual and semantic information, enhancing overall model performance.
Some previous text-to-video models typically use pre-trained CLIP and T5-XXL as text encoders where CLIP uses Transformer Encoder and T5 uses an Encoder-Decoder structure. In contrast, we utilize a pre-trained Multimodal Large Language Model (MLLM) with a Decoder-Only structure as our text encoder, which has the following advantages: (i) Compared with T5, MLLM after visual instruction finetuning has better image-text alignment in the feature space, which alleviates the difficulty of the instruction following in diffusion models; (ii) Compared with CLIP, MLLM has demonstrated superior ability in image detail description and complex reasoning; (iii) MLLM can play as a zero-shot learner by following system instructions prepended to user prompts, helping text features pay more attention to key information. In addition, MLLM is based on causal attention while T5-XXL utilizes bidirectional attention that produces better text guidance for diffusion models. Therefore, we introduce an extra bidirectional token refiner to enhance text features.
HunyuanVideo trains a 3D VAE with CausalConv3D to compress pixel-space videos and images into a compact latent space. We set the compression ratios of video length, space, and channel to 4, 8, and 16 respectively. This can significantly reduce the number of tokens for the subsequent diffusion transformer model, allowing us to train videos at the original resolution and frame rate.
To address the variability in linguistic style and length of user-provided prompts, we fine-tune the Hunyuan-Large model as our prompt rewrite model to adapt the original user prompt to model-preferred prompt.
We provide two rewrite modes: Normal mode and Master mode, which can be called using different prompts. The prompts are shown here. The Normal mode is designed to enhance the video generation model's comprehension of user intent, facilitating a more accurate interpretation of the instructions provided. The Master mode enhances the description of aspects such as composition, lighting, and camera movement, which leans towards generating videos with a higher visual quality. However, this emphasis may occasionally result in the loss of some semantic details.
The Prompt Rewrite Model can be directly deployed and inferred using the Hunyuan-Large original code. We release the weights of the Prompt Rewrite Model here.
To evaluate the performance of HunyuanVideo, we selected five strong baselines from closed-source video generation models. In total, we utilized 1,533 text prompts, generating an equal number of video samples with HunyuanVideo in a single run. For a fair comparison, we conducted inference only once, avoiding any cherry-picking of results. When comparing with the baseline methods, we maintained the default settings for all selected models, ensuring consistent video resolution. Videos were assessed based on three criteria: Text Alignment, Motion Quality, and Visual Quality. More than 60 professional evaluators performed the evaluation. Notably, HunyuanVideo demonstrated the best overall performance, particularly excelling in motion quality. Please note that the evaluation is based on Hunyuan Video's high-quality version. This is different from the currently released fast version.
| Model | Open Source | Duration | Text Alignment | Motion Quality | Visual Quality | Overall | Ranking |
|---|---|---|---|---|---|---|---|
| HunyuanVideo (Ours) | ✔ | 5s | 61.8% | 66.5% | 95.7% | 41.3% | 1 |
| CNTopA (API) | ✘ | 5s | 62.6% | 61.7% | 95.6% | 37.7% | 2 |
| CNTopB (Web) | ✘ | 5s | 60.1% | 62.9% | 97.7% | 37.5% | 3 |
| GEN-3 alpha (Web) | ✘ | 6s | 47.7% | 54.7% | 97.5% | 27.4% | 4 |
| Luma1.6 (API) | ✘ | 5s | 57.6% | 44.2% | 94.1% | 24.8% | 5 |
| CNTopC (Web) | ✘ | 5s | 48.4% | 47.2% | 96.3% | 24.6% | 6 |
The following table shows the requirements for running HunyuanVideo model (batch size = 1) to generate videos:
| Model | Setting (height/width/frame) |
GPU Peak Memory |
|---|---|---|
| HunyuanVideo | 720px1280px129f | 60GB |
| HunyuanVideo | 544px960px129f | 45GB |
- An NVIDIA GPU with CUDA support is required.
- The model is tested on a single 80G GPU.
- Minimum: The minimum GPU memory required is 60GB for 720px1280px129f and 45G for 544px960px129f.
- Recommended: We recommend using a GPU with 80GB of memory for better generation quality.
- Tested operating system: Linux
Begin by cloning the repository:
git clone https://github.com/tencent/HunyuanVideo
cd HunyuanVideoWe provide an environment.yml file for setting up a Conda environment.
Conda's installation instructions are available here.
We recommend CUDA versions 12.4 or 11.8 for the manual installation.
# 1. Prepare conda environment
conda env create -f environment.yml
# 2. Activate the environment
conda activate HunyuanVideo
# 3. Install pip dependencies
python -m pip install -r requirements.txt
# 4. Install flash attention v2 for acceleration (requires CUDA 11.8 or above)
python -m pip install ninja
python -m pip install git+https://github.com/Dao-AILab/flash-attention.git@v2.6.3In case of running into float point exception(core dump) on the specific GPU type, you may try the following solutions:
# Option 1: Making sure you have installed CUDA 12.4, CUBLAS>=12.4.5.8, and CUDNN>=9.00 (or simply using our CUDA 12 docker image).
pip install nvidia-cublas-cu12==12.4.5.8
export LD_LIBRARY_PATH=/opt/conda/lib/python3.8/site-packages/nvidia/cublas/lib/
# Option 2: Forcing to explictly use the CUDA 11.8 compiled version of Pytorch and all the other packages
pip uninstall -r requirements.txt # uninstall all packages
pip install torch==2.4.0 --index-url https://download.pytorch.org/whl/cu118
pip install -r requirements.txt
python -m pip install git+https://github.com/Dao-AILab/flash-attention.git@v2.6.3Additionally, HunyuanVideo also provides a pre-built Docker image. Use the following command to pull and run the docker image.
# For CUDA 12.4 (updated to avoid float point exception)
docker pull hunyuanvideo/hunyuanvideo:cuda_12
docker run -itd --gpus all --init --net=host --uts=host --ipc=host --name hunyuanvideo --security-opt=seccomp=unconfined --ulimit=stack=67108864 --ulimit=memlock=-1 --privileged hunyuanvideo/hunyuanvideo:cuda_12
# For CUDA 11.8
docker pull hunyuanvideo/hunyuanvideo:cuda_11
docker run -itd --gpus all --init --net=host --uts=host --ipc=host --name hunyuanvideo --security-opt=seccomp=unconfined --ulimit=stack=67108864 --ulimit=memlock=-1 --privileged hunyuanvideo/hunyuanvideo:cuda_11The details of download pretrained models are shown here.
We list the height/width/frame settings we support in the following table.
| Resolution | h/w=9:16 | h/w=16:9 | h/w=4:3 | h/w=3:4 | h/w=1:1 |
|---|---|---|---|---|---|
| 540p | 544px960px129f | 960px544px129f | 624px832px129f | 832px624px129f | 720px720px129f |
| 720p (recommended) | 720px1280px129f | 1280px720px129f | 1104px832px129f | 832px1104px129f | 960px960px129f |
cd HunyuanVideo
python3 sample_video.py \
--video-size 720 1280 \
--video-length 129 \
--infer-steps 50 \
--prompt "A cat walks on the grass, realistic style." \
--flow-reverse \
--use-cpu-offload \
--save-path ./resultspython3 gradio_server.py --flow-reverse
# set SERVER_NAME and SERVER_PORT manually
# SERVER_NAME=0.0.0.0 SERVER_PORT=8081 python3 gradio_server.py --flow-reverseWe list some more useful configurations for easy usage:
| Argument | Default | Description |
|---|---|---|
--prompt |
None | The text prompt for video generation |
--video-size |
720 1280 | The size of the generated video |
--video-length |
129 | The length of the generated video |
--infer-steps |
50 | The number of steps for sampling |
--embedded-cfg-scale |
6.0 | Embedded Classifier free guidance scale |
--flow-shift |
7.0 | Shift factor for flow matching schedulers |
--flow-reverse |
False | If reverse, learning/sampling from t=1 -> t=0 |
--seed |
None | The random seed for generating video, if None, we init a random seed |
--use-cpu-offload |
False | Use CPU offload for the model load to save more memory, necessary for high-res video generation |
--save-path |
./results | Path to save the generated video |
xDiT is a Scalable Inference Engine for Diffusion Transformers (DiTs) on multi-GPU Clusters. It has successfully provided low-latency parallel inference solutions for a variety of DiTs models, including mochi-1, CogVideoX, Flux.1, SD3, etc. This repo adopted the Unified Sequence Parallelism (USP) APIs for parallel inference of the HunyuanVideo model.
# 1. Create a black conda environment
conda create -n hunyuanxdit python==3.10.9
conda activate hunyuanxdit
# 3. Install PyTorch component with CUDA 11.8
conda install pytorch==2.4.0 torchvision==0.19.0 torchaudio==2.4.0 pytorch-cuda=11.8 -c pytorch -c nvidia
# 3. Install pip dependencies
python -m pip install -r requirements_xdit.txt
You can skip the above steps and pull the pre-built docker image directly, which is built from docker/Dockerfile_xDiT
docker pull thufeifeibear/hunyuanvideo:latest
For example, to generate a video with 8 GPUs, you can use the following command:
cd HunyuanVideo
torchrun --nproc_per_node=8 sample_video.py \
--video-size 1280 720 \
--video-length 129 \
--infer-steps 50 \
--prompt "A cat walks on the grass, realistic style." \
--flow-reverse \
--seed 42 \
--ulysses-degree 8 \
--ring-degree 1 \
--save-path ./resultsYou can change the --ulysses-degree and --ring-degree to control the parallel configurations for the best performance. The valid parallel configurations are shown in the following table.
Supported Parallel Configurations (Click to expand)
| --video-size | --video-length | --ulysses-degree x --ring-degree | --nproc_per_node |
|---|---|---|---|
| 1280 720 or 720 1280 | 129 | 8x1,4x2,2x4,1x8 | 8 |
| 1280 720 or 720 1280 | 129 | 1x5 | 5 |
| 1280 720 or 720 1280 | 129 | 4x1,2x2,1x4 | 4 |
| 1280 720 or 720 1280 | 129 | 3x1,1x3 | 3 |
| 1280 720 or 720 1280 | 129 | 2x1,1x2 | 2 |
| 1104 832 or 832 1104 | 129 | 4x1,2x2,1x4 | 4 |
| 1104 832 or 832 1104 | 129 | 3x1,1x3 | 3 |
| 1104 832 or 832 1104 | 129 | 2x1,1x2 | 2 |
| 960 960 | 129 | 6x1,3x2,2x3,1x6 | 6 |
| 960 960 | 129 | 4x1,2x2,1x4 | 4 |
| 960 960 | 129 | 3x1,1x3 | 3 |
| 960 960 | 129 | 1x2,2x1 | 2 |
| 960 544 or 544 960 | 129 | 6x1,3x2,2x3,1x6 | 6 |
| 960 544 or 544 960 | 129 | 4x1,2x2,1x4 | 4 |
| 960 544 or 544 960 | 129 | 3x1,1x3 | 3 |
| 960 544 or 544 960 | 129 | 1x2,2x1 | 2 |
| 832 624 or 624 832 | 129 | 4x1,2x2,1x4 | 4 |
| 624 832 or 624 832 | 129 | 3x1,1x3 | 3 |
| 832 624 or 624 832 | 129 | 2x1,1x2 | 2 |
| 720 720 | 129 | 1x5 | 5 |
| 720 720 | 129 | 3x1,1x3 | 3 |
| Latency (Sec) for 1280x720 (129 frames 50 steps) on 8xGPU | |||
|---|---|---|---|
| 1 | 2 | 4 | 8 |
| 1904.08 | 934.09 (2.04x) | 514.08 (3.70x) | 337.58 (5.64x) |
If you find HunyuanVideo useful for your research and applications, please cite using this BibTeX:
@misc{kong2024hunyuanvideo,
title={HunyuanVideo: A Systematic Framework For Large Video Generative Models},
author={Weijie Kong, Qi Tian, Zijian Zhang, Rox Min, Zuozhuo Dai, Jin Zhou, Jiangfeng Xiong, Xin Li, Bo Wu, Jianwei Zhang, Kathrina Wu, Qin Lin, Aladdin Wang, Andong Wang, Changlin Li, Duojun Huang, Fang Yang, Hao Tan, Hongmei Wang, Jacob Song, Jiawang Bai, Jianbing Wu, Jinbao Xue, Joey Wang, Junkun Yuan, Kai Wang, Mengyang Liu, Pengyu Li, Shuai Li, Weiyan Wang, Wenqing Yu, Xinchi Deng, Yang Li, Yanxin Long, Yi Chen, Yutao Cui, Yuanbo Peng, Zhentao Yu, Zhiyu He, Zhiyong Xu, Zixiang Zhou, Zunnan Xu, Yangyu Tao, Qinglin Lu, Songtao Liu, Daquan Zhou, Hongfa Wang, Yong Yang, Di Wang, Yuhong Liu, and Jie Jiang, along with Caesar Zhong},
year={2024},
archivePrefix={arXiv preprint arXiv:2412.03603},
primaryClass={cs.CV},
url={https://arxiv.org/abs/2412.03603},
}If you develop/use HunyuanVideo in your projects, welcome to let us know.
- ComfyUI (with support for F8 Inference and Video2Video Generation): ComfyUI-HunyuanVideoWrapper by Kijai
We would like to thank the contributors to the SD3, FLUX, Llama, LLaVA, Xtuner, diffusers and HuggingFace repositories, for their open research and exploration. Additionally, we also thank the Tencent Hunyuan Multimodal team for their help with the text encoder.
