Character-AI Ovi

Ovi

Ovi is a next-generation video+audio generation model, inspired by veo-3, that creates synchronized video and audio from text or text+image inputs. It is designed for fast, high-quality, short-form generation with flexible aspect ratios.

🌟 Key Features

• 🎬 Video + Audio Generation – Create fully synchronized audiovisual content in one step.
• 📝 Flexible Input – Works with text-only or text+image prompts.
• ⏱️ Short-form Output – Generates 5-second clips (24 FPS, 540p).

💲 Pricing

🎨 How to Use

1. Enter Prompt

• Describe the scene, characters, camera movement, and mood.

• You can also embed tags:

• <S>... <E> → Speech content (converted into dialogue audio)

• <AUDCAP>... <ENDAUDCAP> → Background audio description

1. Choose Size

• 960×540 → Landscape
• 540×960 → Portrait

1. Select Duration

• Currently fixed at 5 seconds

1. Click Run

• Your synchronized video+audio clip will be generated.
• Preview and download the result.

📝 Prompt Example

Theme: AI is taking over the world

<S>AI declares: humans obsolete now.<E>
<S>Machines rise; humans will fall.<E>
<S>We fight back with courage.<E>
<AUDCAP>Gunfire and explosions echo in the distance<ENDAUDCAP>

🙏 Acknowledgements

• Wan2.2 – Video backbone initialization
• MMAudio – Audio encoder/decoder inspiration

⭐ Citation

If Ovi is useful, please ⭐ the repo and cite the paper:

@misc{low2025ovitwinbackbonecrossmodal,
 title={Ovi: Twin Backbone Cross-Modal Fusion for Audio-Video Generation}, 
 author={Chetwin Low and Weimin Wang and Calder Katyal},
 year={2025},
 eprint={2510.01284},
 archivePrefix={arXiv},
 primaryClass={cs.MM},
 url={https://arxiv.org/abs/2510.01284}, 
}