LatentSync

LatentSync is an AI-powered video lip synchronization framework that uses latent diffusion models to align audio and video without intermediate motion representations.

What is LatentSync?

LatentSync is a web-based and locally deployable tool that takes an audio file (MP3, WAV, M4A) and a video file (MP4) and produces a lip-synced video. It is built on latent diffusion technology and integrates OpenAI's Whisper for audio embeddings. The platform is available at latentsync.com.

Key Features

• Advanced LatentSync Engine — Uses state-of-the-art latent diffusion models for precise lip movement synchronization without intermediate motion representations.
• Multi-Language Support — Handles diverse languages and accents, with optimized support for Chinese content, making it suitable for global dubbing and localization.
• High-Fidelity Output — Delivers 512x512 resolution videos with enhanced temporal consistency to reduce blurriness.
• Whisper Integration — Converts melspectrograms into audio embeddings using OpenAI's Whisper for accurate synchronization.
• Reduced VRAM Requirements — Runs inference with as little as 8GB VRAM (v1.5) or 18GB (v1.6) for accessible deployment.
• Flexible Deployment Options — Supports a user-friendly Gradio App and a robust Command Line Interface (CLI) for versatile workflows.
• Open Source Ecosystem — Provides full access to inference code, checkpoints, and data processing pipelines for custom development.

Who is it for?

• Video production studios — For professional dubbing and localization of movies and TV shows.
• Content creators on social media — For repurposing and localizing short-form video content on platforms like TikTok and YouTube.
• Virtual avatar developers — For driving photorealistic digital humans or anime characters with precise lip sync.
• Educational content producers — For aligning instructors' lips with localized audio tracks in training materials.

What can you do with LatentSync?

• Video Dubbing & Localization — Synchronize lip movements with translated audio for a native viewing experience across languages.
• Virtual Avatars & Digital Humans — Bring digital characters to life with accurate speech alignment.
• Social Media Content Creation — Expand reach by localizing short-form videos without losing authenticity.
• Educational & Corporate Training — Enhance global learning materials with synchronized instructor audio.

Pricing

LatentSync offers three annual subscription plans with credits (average 10 credits per second of video):

• Starter — $99.00/year for 600 credits per month (7,200 credits/year).
• Pro — $499.00/year for 3,000 credits per month (36,000 credits/year).
• Ultimate — $999.00/year for 6,000 credits per month (72,000 credits/year).

How does LatentSync work?

LatentSync uses an audio-conditioned latent diffusion model to directly map audio to video pixels without intermediate motion representations. It integrates Whisper to convert melspectrograms into audio embeddings, then applies pixel-space losses (TREPA, LPIPS, SyncNet) for temporal consistency and visual quality. The system is trained on 512x512 resolution videos and includes temporal layers for smooth frame-to-frame lip movements.