How to use AI Lip Sync
What does it do?
Syncs the lips in a real video to new audio — your recorded voice, your saved voice, an AI voice from text, or an audio file — with lipsync-2.
What you need
A video showing the speaker’s face (up to 60 s), new audio, consent from the person shown and heard, SARA credits and a Business plan.
Steps
- Choose the video.
- Prepare the new audio: type text and pick a voice (or “My voice”), record now, or upload a file.
- Choose how to handle different lengths and tick the consent.
- Press “Sync the lips”, wait, then download.
What you get
The same video, with the lips moving to match the new audio.
Tips for better results
- A clear, front-facing face gives the most accurate sync.
- Clean audio without background music works best.
- Never use it to impersonate or mislead.
Requirements
You need to sign in, a Business plan and SARA credits. Your files are sent to fal.ai to create the video and are not stored in your account.
Top 4 uses
1Dubbing
A video in a new language with matching lips.
2Fixing speech
Replace a wrong sentence without reshooting.
3Ads
One version per market with the same presenter.
4Education
Lessons in several voices and languages.
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