Lipsync-2-Pro Model

Overview

Lipsync-2-Pro, developed by Sync Labs, is a state-of-the-art AI-powered video editing model designed to deliver studio-grade lip synchronization in minutes. Built on advanced video editing model architecture, it enables seamless lip-syncing for live-action, 3D animation, and AI-generated videos, supporting resolutions up to 4K. This model preserves unique speaker details like natural teeth and facial features without requiring fine-tuning or speaker-specific training. It is ideal for video translation, dialogue replacement, and character re-animation workflows.

Features

Zero-Shot Lip-Syncing: No need for pre-training or fine-tuning; the model instantly learns and replicates a speaker’s unique style.
High-Resolution Support: Handles videos up to 4K with enhanced detail preservation for features like beards, freckles, and teeth.
Cross-Domain Compatibility: Works with live-action, animated, and AI-generated characters.
Multilingual Dubbing: Supports seamless lip-syncing across multiple languages for global content localization.
Flexible Workflows: Enables video translation, word-level editing, and re-animation, including realistic AI-generated user content.
API Integration: Available via Sync Labs’ API for scalable integration into films, ads, podcasts, games, and more.

Usage

Prepare Input:
Video: Upload a video file (supported formats: MP4, MOV, WEBM, M4V, GIF) containing a face for lip-syncing.
Audio: Provide an audio file (supported formats: MP3, OGG, WAV, M4A, AAC) or text-to-speech input to sync with the video.
Best Practices:
Ensure the input video shows the speaker actively talking to provide natural speaking motion for optimal results.
For AI-generated videos, include a text prompt like “person is speaking naturally” to ensure lip movement.
For complex scenes with obstructions, enable the occlusion_detection_enabled option to improve face detection (note: this may slow processing).
Advanced Settings:
Temperature Control: Adjust the expressiveness of lip movements (subtle to exaggerated).
Active Speaker Detection: Automatically detects and syncs the active speaker in multi-person videos.
Resolution Handling: Lipsync-2-Pro uses diffusion-based super-resolution for enhanced detail preservation, ideal for large faces or high-quality outputs.
Output:
The model generates a lip-synced video with precise audio-visual alignment, ready for download or further editing.

Limitations

Still Frames: The model requires active speaking motion in the input video. Static or still segments may not produce lip movement.
Complex Scenes: Extreme profile views or partially obscured faces may yield suboptimal results. Use the latest model for improved pose robustness.
Plan Requirements: API access to Lipsync-2-Pro requires a Scale plan or higher. Studio users can access all models with usage-based billing.

Pricing

Lipsync-2-Pro is available through Replicate’s usage-based pricing. For detailed pricing and plan requirements, visit Sync Labs Pricing. A Scale plan or higher is required for API access.

Resources

Official Website: Sync.so
API Documentation: Sync Labs API

Citation

If you use Lipsync-2-Pro in your project, please cite:

@misc{sync-labs-lipsync-2-pro,
  author = {Sync Labs},
  title = {Lipsync-2-Pro: Studio-Grade Lip Synchronization Model},
  year = {2025},
  url = {https://sync.so/lipsync-2-pro}
}

License

The Lipsync-2-Pro model is subject to Sync Labs’ terms of service and privacy policy. For commercial use, refer to Sync Labs’ Terms.