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About
Lip Sync AI is an online AI lip-sync video generator for dubbing and talking-avatar creation. Users upload a source video (or a portrait photo) plus an audio track to generate frame-accurate mouth movements that match speech timing. The system describes phoneme recognition and facial motion synthesis to align lip shapes to consonants, vowels, pauses, and breaths, while preserving natural facial expressions (eyes, eyebrows, and head motion) to avoid a frozen look. It supports multilingual workflows, allowing creators to replace original dialogue with translated audio and automatically re-sync lip movements for localization across 40+ languages. For more complex scenes, it includes multi-speaker detection to identify and track different characters for per-speaker synchronization. The product offers multiple lip-sync models and modes, real-time preview, and exports up to 4K depending on plan.
Problem & solution
Problem
Video dubbing needs accurate lip sync and expressions, especially across languages and speakers.
Solution
AI matches phonemes to mouth motion, preserving expressions and handling multilingual, multi-speaker video.
Who it's for
Filmmakers, creators, educators, and marketing teams needing dubbed or talking-avatar videos.
Main features
- Phoneme-level lip sync
- 40+ language support
- Multi-speaker detection
- Expression preservation
- Up to 4K export
Use cases
- Multilingual video dubbing
- Talking avatar from a photo
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