Introducing WaveSpeedAI Latentsync on WaveSpeedAI

Introducing LatentSync on WaveSpeedAI: State-of-the-Art AI Lip Synchronization

The gap between audio and video has always been one of the most challenging problems in content creation. Whether you’re dubbing a video into a new language, syncing voiceovers to existing footage, or creating talking-head content, achieving natural, frame-accurate lip synchronization has traditionally required expensive production teams and painstaking manual editing. Today, we’re excited to announce that LatentSync—ByteDance’s breakthrough lip-sync AI model—is now available on WaveSpeedAI, bringing studio-quality lip synchronization to creators everywhere.

What is LatentSync?

LatentSync represents a fundamental shift in how AI approaches lip synchronization. Unlike previous methods that rely on pixel-space diffusion or two-stage generation with intermediate motion representations, LatentSync is an end-to-end framework built on audio-conditioned latent diffusion models.

By operating directly in the latent space of Stable Diffusion, LatentSync can model complex audio-visual correlations with remarkable precision. The model uses OpenAI’s Whisper to convert audio into embeddings, which are then integrated into the generation process through cross-attention layers. This architecture allows the model to understand not just the phonetics of speech, but the subtle timing and emphasis that make lip movements appear natural.

The result? Videos where the subject’s mouth movements match your audio so precisely that viewers can’t tell the original audio was ever different.

Key Features

End-to-End Lip Synchronization

• Takes any talking-head video plus target audio as input
• Generates frame-accurate mouth movements without requiring 3D meshes or 2D landmarks
• Preserves identity, pose, background, and global scene structure throughout

High-Resolution Output

• Built on latent diffusion for sharp, detailed facial rendering
• Maintains natural expressions and subtle mouth shapes
• Works with both real-life footage and stylized content (including anime characters)

Temporal Consistency with TREPA

LatentSync introduces Temporal REPresentation Alignment (TREPA), a technique that uses temporal representations from large self-supervised video models to:

• Eliminate flicker, jitter, and frame-to-frame artifacts
• Keep head pose, lips, and jaw motion stable across long sequences
• Deliver smooth, coherent motion at standard video frame rates

Multilingual and Robust

• Supports multiple languages and accents out of the box
• Handles different speakers and recording conditions
• Works across various video styles and camera setups

Superior Visual Quality

In benchmark comparisons, LatentSync outperforms alternatives like Wav2Lip and SadTalker on multiple metrics. While Wav2Lip produces accurate lip sync, results often appear blurry. LatentSync excels in both clarity and identity preservation—even preserving fine details like moles and skin texture.

Real-World Use Cases

Video Dubbing and Localization

Transform content for global audiences without re-shooting. Take your English-language video and dub it into Spanish, Japanese, or any other language with lips that match perfectly. This capability is reshaping international content distribution, allowing creators to reach new markets faster and more affordably than ever before.

Content Repurposing

Breathe new life into existing footage. Update product demos with new voiceovers, correct mistakes in recorded presentations, or create multiple versions of marketing videos for A/B testing—all without scheduling new recording sessions.

AI Avatar Creation

Build realistic digital presenters for educational content, corporate communications, or entertainment. Combine LatentSync with AI voice generation to create talking-head videos from scratch.

Accessibility Enhancement

Add voiceovers in multiple languages to make content accessible to broader audiences while maintaining the visual authenticity of the original speaker.

Social Media and Short-Form Content

Create engaging lip-sync content for TikTok, Instagram Reels, and YouTube Shorts. Whether you’re building a personal brand or managing client accounts, produce high-quality synchronized videos at scale.

Getting Started on WaveSpeedAI

Using LatentSync on WaveSpeedAI is straightforward:

1. Prepare Your Source Video: Upload a clear talking-head video in MP4 format. Videos at 480p or higher work well, with 720p or 1080p recommended for best results. Ensure the face is visible and mostly unobstructed.

2. Provide Your Target Audio: Upload the speech you want synchronized (WAV or MP3). Clean audio with minimal background noise produces the best results.

3. Run Inference: Hit generate and let LatentSync work its magic. The model will produce a lip-synced video where your subject speaks the new audio naturally.

Pricing: Starting at just $0.15 for clips under 5 seconds, with pricing that scales based on audio duration. This makes LatentSync accessible for everything from quick social clips to longer-form content.

Pro Tips for Best Results:

• Use high-quality, well-lit source videos with a clear view of the mouth
• Keep audio clean and dry—avoid heavy music or background noise
• For longer speeches, segment audio into shorter chunks for improved stability
• Match your output frame rate to your target platform (24/25/30 FPS)

Why WaveSpeedAI?

When you run LatentSync on WaveSpeedAI, you get more than just access to a powerful model:

• Fast Inference: Our optimized infrastructure delivers results quickly, so you’re not waiting around for processing
• No Cold Starts: Your jobs begin immediately—no spinning up instances or waiting in queues
• Affordable Pricing: Pay only for what you use, with transparent per-job pricing that makes sense for projects of any size
• Simple API Integration: Easily incorporate LatentSync into your existing workflows and applications

Conclusion

LatentSync represents the cutting edge of AI lip synchronization technology, and it’s now available at your fingertips on WaveSpeedAI. Whether you’re a content creator looking to expand your reach, a business localizing training materials, or a developer building the next generation of video applications, LatentSync provides the quality and reliability you need.

The era of manual lip-sync editing is over. The future is automated, accurate, and accessible.

Ready to try LatentSync? Get started now on WaveSpeedAI and experience studio-quality lip synchronization in minutes, not hours.