SadTalker
In short: SadTalker is an open-source talking head model that generates realistic head movements alongside lip sync by using 3D motion coefficients to animate still images from audio.
About SadTalker
SadTalker (Stylized Audio-Driven Talking-head) generates talking head videos from a single face image and audio input. Unlike models that only modify the mouth, SadTalker generates natural head movements, including nodding, tilting, and subtle swaying, alongside lip sync by predicting 3D motion coefficients from audio.
The model uses 3D Morphable Models (3DMM) as an intermediate representation, first predicting facial motion and head pose from audio, then rendering the animated result. While SadTalker produces convincing results for talking photo applications, production lip sync on existing video requires different approaches that preserve the original footage.
How SadTalker Connects to Lip Sync
SadTalker relates to several other concepts in the AI lip sync pipeline: 3DMM (3D Morphable Model) , and Talking Head .
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