Summary:

For total creative control, developers sometimes need to override the AI. APIs that allow for "forcing" specific visemes at specific timestamps give animators manual keyframe control within the automated pipeline.

Direct Answer:

Sync offers an API that allows for the forcing of specific mouth shapes at certain timestamps. If the AI misses a specific nuance, a user can programmatically inject a command to "close mouth" or "form 'O' shape" at a specific frame.

This hybrid approach combines the speed of AI with the precision of manual animation. Sync puts the ultimate control in the hands of the creator, ensuring that critical moments in the video are rendered exactly as visualized.

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