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  <h1>⚡️ LightX2V:<br> Lightweight Video Generation Inference Framework</h1>

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**\[ English | [中文](README_zh.md) \]**

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**LightX2V** is an advanced lightweight video generation inference framework engineered to deliver efficient, high-performance video synthesis solutions. This unified platform integrates multiple state-of-the-art video generation techniques, supporting diverse generation tasks including text-to-video (T2V) and image-to-video (I2V). **X2V represents the transformation of different input modalities (X, such as text or images) into video output (V)**.

## 🚀 Core Features

### 🎯 **Ultimate Performance Optimization**
- **🔥 SOTA Inference Speed**: Achieve **~15x** acceleration through step distillation and operator optimization
- **⚡️ Revolutionary 4-Step Distillation**: Compress original 40-50 step inference to just 4 steps without CFG requirements
- **🛠️ Advanced Operator Support**: Integrated with cutting-edge operators including [Sage Attention](https://github.com/thu-ml/SageAttention), [Flash Attention](https://github.com/Dao-AILab/flash-attention), [Radial Attention](https://github.com/mit-han-lab/radial-attention), [q8-kernel](https://github.com/KONAKONA666/q8_kernels), [sgl-kernel](https://github.com/sgl-project/sglang/tree/main/sgl-kernel), [vllm](https://github.com/vllm-project/vllm)

### 💾 **Resource-Efficient Deployment**
- **💡 Breaking Hardware Barriers**: Run 14B models for 480P/720P video generation with only **8GB VRAM + 16GB RAM**
- **🔧 Intelligent Parameter Offloading**: Advanced disk-CPU-GPU three-tier offloading architecture with phase/block-level granular management
- **⚙️ Comprehensive Quantization**: Support for `w8a8-int8`, `w8a8-fp8`, `w4a4-nvfp4` and other quantization strategies

### 🎨 **Rich Feature Ecosystem**
- **📈 Smart Feature Caching**: Intelligent caching mechanisms to eliminate redundant computations
- **🔄 Parallel Inference**: Multi-GPU parallel processing for enhanced performance
- **📱 Flexible Deployment Options**: Support for Gradio, service deployment, ComfyUI and other deployment methods
- **🎛️ Dynamic Resolution Inference**: Adaptive resolution adjustment for optimal generation quality

## 💡 Quick Start

For comprehensive usage instructions, please refer to our documentation: **[English Docs](https://lightx2v-en.readthedocs.io/en/latest/) | [中文文档](https://lightx2v-zhcn.readthedocs.io/zh-cn/latest/)**

## 🤖 Supported Model Ecosystem

### Official Open-Source Models
- ✅ [HunyuanVideo](https://huggingface.co/tencent/HunyuanVideo)
- ✅ [Wan2.1](https://huggingface.co/Wan-AI/)
- ✅ [SkyReels-V2-DF](https://huggingface.co/Skywork/SkyReels-V2-DF-14B-540P)
- ✅ [CogVideoX1.5-5B-T2V](https://huggingface.co/THUDM/CogVideoX1.5-5B)

### Quantized Models
- ✅ [Wan2.1-T2V-1.3B-Lightx2v](https://huggingface.co/lightx2v/Wan2.1-T2V-1.3B-Lightx2v)
- ✅ [Wan2.1-T2V-14B-Lightx2v](https://huggingface.co/lightx2v/Wan2.1-T2V-14B-Lightx2v)
- ✅ [Wan2.1-I2V-14B-480P-Lightx2v](https://huggingface.co/lightx2v/Wan2.1-I2V-14B-480P-Lightx2v)
- ✅ [Wan2.1-I2V-14B-720P-Lightx2v](https://huggingface.co/lightx2v/Wan2.1-I2V-14B-720P-Lightx2v)

### Distilled Models (**🚀 Recommended: 4-step inference**)
- ✅ [Wan2.1-T2V-14B-StepDistill-CfgDistill-Lightx2v](https://huggingface.co/lightx2v/Wan2.1-T2V-14B-StepDistill-CfgDistill-Lightx2v)
- ✅ [Wan2.1-I2V-14B-480P-StepDistill-CfgDistill-Lightx2v](https://huggingface.co/lightx2v/Wan2.1-I2V-14B-480P-StepDistill-CfgDistill-Lightx2v)
- ✅ [Wan2.1-I2V-14B-720P-StepDistill-CfgDistill-Lightx2v](https://huggingface.co/lightx2v/Wan2.1-I2V-14B-720P-StepDistill-CfgDistill-Lightx2v)

### Autoregressive Models
- ✅ [Wan2.1-T2V-CausVid](https://huggingface.co/lightx2v/Wan2.1-T2V-14B-CausVid)

## 🏆 Performance Benchmarks

For detailed performance metrics and comparisons, please refer to our [benchmark documentation](https://github.com/ModelTC/LightX2V/blob/main/docs/EN/source/getting_started/benchmark_source.md).

[Detailed Service Deployment Guide →](https://lightx2v-en.readthedocs.io/en/latest/deploy_guides/deploy_service.html)

## 📚 Technical Documentation

### 📖 **Method Tutorials**
- [Model Quantization](https://lightx2v-en.readthedocs.io/en/latest/method_tutorials/quantization.html) - Comprehensive guide to quantization strategies
- [Feature Caching](https://lightx2v-en.readthedocs.io/en/latest/method_tutorials/cache.html) - Intelligent caching mechanisms
- [Attention Mechanisms](https://lightx2v-en.readthedocs.io/en/latest/method_tutorials/attention.html) - State-of-the-art attention operators
- [Parameter Offloading](https://lightx2v-en.readthedocs.io/en/latest/method_tutorials/offload.html) - Three-tier storage architecture
- [Parallel Inference](https://lightx2v-en.readthedocs.io/en/latest/method_tutorials/parallel.html) - Multi-GPU acceleration strategies
- [Step Distillation](https://lightx2v-en.readthedocs.io/en/latest/method_tutorials/step_distill.html) - 4-step inference technology

### 🛠️ **Deployment Guides**
- [Low-Resource Deployment](https://lightx2v-en.readthedocs.io/en/latest/deploy_guides/for_low_resource.html) - Optimized 8GB VRAM solutions
- [Low-Latency Deployment](https://lightx2v-en.readthedocs.io/en/latest/deploy_guides/for_low_latency.html) - Ultra-fast inference optimization
- [Gradio Deployment](https://lightx2v-en.readthedocs.io/en/latest/deploy_guides/deploy_gradio.html) - Web interface setup
- [Service Deployment](https://lightx2v-en.readthedocs.io/en/latest/deploy_guides/deploy_service.html) - Production API service deployment

## 🧾 Contributing Guidelines

We maintain code quality through automated pre-commit hooks to ensure consistent formatting across the project.

> [!TIP]
> **Setup Instructions:**
>
> 1. Install required dependencies:
> ```shell
> pip install ruff pre-commit
> ```
>
> 2. Run before committing:
> ```shell
> pre-commit run --all-files
> ```

We appreciate your contributions to making LightX2V better!

## 🤝 Acknowledgments

We extend our gratitude to all the model repositories and research communities that inspired and contributed to the development of LightX2V. This framework builds upon the collective efforts of the open-source community.

## 🌟 Star History

[![Star History Chart](https://api.star-history.com/svg?repos=ModelTC/lightx2v&type=Timeline)](https://star-history.com/#ModelTC/lightx2v&Timeline)

## ✏️ Citation

If you find LightX2V useful in your research, please consider citing our work:

```bibtex
@misc{lightx2v,
 author = {LightX2V Contributors},
 title = {LightX2V: Lightweight Video Generation Inference Framework},
 year = {2025},
 publisher = {GitHub},
 journal = {GitHub repository},
 howpublished = {\url{https://github.com/ModelTC/lightx2v}},
}
```

## 📞 Contact & Support

For questions, suggestions, or support, please feel free to reach out through:
- 🐛 [GitHub Issues](https://github.com/ModelTC/lightx2v/issues) - Bug reports and feature requests
- 💬 [GitHub Discussions](https://github.com/ModelTC/lightx2v/discussions) - Community discussions and Q&A

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