Seaweed

Portrait-driven video with natural lip sync

Tags Free AI tools Creator tools AI video generator Lip sync video AI digital human

What Seaweed is

Seaweed is a portrait-driven AI video generation model, presented as a demo site. It generates character video from audio, mapping the emotion, rhythm and pauses of speech to lip sync and body movement.

It also supports generating audio and video together, matching scene atmosphere and narrative rhythm, with capability for longer single-lens shots than typical short-clip tools.

What you can do with it

Generate a speaking character from an audio track
Match mouth movement to emotion and pacing
Produce longer single-shot dialogue scenes
Generate audio and video together for narrative experiments

Who it is for

Digital human teams
Video creators focused on character delivery
Researchers testing audio-driven video quality
Creators making virtual character narratives

What to watch out for

Likeness and voice authorization is mandatory; generating a real person's speaking video without consent is prohibited
Speaking output can be mistaken for genuine footage; disclosure protects audiences
Demo-stage availability means capability may change
Body movement realism varies with audio complexity

Pros & cons

✓ What we like

Audio-driven performance rather than static lip flap
Longer shots than typical generators
Joint audio and video generation

! What to watch out for

Strict likeness and voice consent requirements
Demo-stage maturity
Realism raises disclosure obligations

FAQ

What does Seaweed generate?

Portrait-driven video where a character speaks with lip sync and body movement matched to audio.

What is it most useful for?

Virtual character dialogue, oral video and long-shot performance where delivery quality matters.

Can it use a real person's voice or face?

Only with explicit consent; impersonation or undisclosed synthetic speech of a real person is not acceptable.

Last reviewed: 2026-09-16