VidMints AI Studio
AI Lip Sync
New words on an existing clip.
Bring a clip into the VidMints editor and lip-sync the character to any script or voice track. The mouth re-animates to match the audio — ideal for dubbing, fixes and localized versions.
Try AI Lip Sync free →What is AI Lip Sync?
AI Lip Sync re-animates the mouth of a person already in a video so it matches new words. You bring in a clip where someone is talking (or where a character's face is visible), give VidMints a new audio track — either typed text turned into speech, or your own recording — and the tool redraws the lip and jaw movement to fit the new sound. The rest of the footage is untouched: same background, same body, same camera, only the mouth changes.
This is the difference between lip-sync and a talking avatar. The avatar builds a whole talking head from a single photo; lip-sync works on video you already have and only fixes the mouth. That makes it the right tool for dubbing an existing clip into another language, correcting a flubbed line without a re-shoot, or producing localized versions of a video where the on-screen mouth needs to agree with the new voiceover.
It runs inside the VidMints editor, so you can layer the new audio, review the sync, and export without moving files between apps. Credits are only spent on a successful render, so an attempt that cannot complete does not cost you.
Why use AI Lip Sync?
Re-shoots are expensive and often impossible — the location is gone, the talent has moved on, the moment has passed. Lip-sync lets you change what someone appears to say without ever getting them back in front of a camera, which turns a scrapped clip into a usable one and a single recording into many language versions.
It is also what makes dubbing look convincing rather than cheap. A translated voiceover over a mouth that is still forming the original words reads as an obvious dub; re-animating the mouth to the new audio closes that gap and keeps viewers inside the story.
Key benefits
Fix lines without a re-shoot
Change a wrong word, an outdated price or a fumbled sentence by feeding in corrected audio — the mouth re-animates to match.
Believable dubbing
Pair a translated voice track with a re-synced mouth so localized versions no longer look like obvious dubs.
Keeps the original footage intact
Only the mouth region is re-animated; background, body and camera movement stay exactly as filmed.
Text or voice input
Drive the new mouth movement from typed text (via speech synthesis) or from an audio recording you provide.
Pay only on success
Credits are charged on a completed render, so a job that cannot finish does not cost you.
How AI Lip Sync works
- 1
Bring your clip into the editor
Open the VidMints editor and load the video whose spoken words you want to change.
- 2
Provide the new audio
Type the new script to generate a voice, or upload/record the exact audio you want the person to appear to say.
- 3
Run the lip-sync
VidMints analyses the audio and re-animates the mouth and jaw frame by frame to match the new sound.
- 4
Review the sync
Play it back and check the alignment; adjust the audio timing if a phrase lands early or late.
- 5
Export the finished clip
Render and download, or continue editing — add captions, mix the audio, or reframe for a platform.
Who it's for & example uses
Localizing a video
Produce French, Spanish or Hindi versions of one clip where the on-screen mouth agrees with each dubbed voiceover.
Post-production fixes
Correct a mispronounced name or a changed detail without dragging talent back to set.
Updating evergreen content
Refresh a spoken figure, date or offer in an old video instead of re-filming the whole thing.
Character and avatar work
Make an illustrated or generated character speak new dialogue on demand.
Pro tips
- Start from footage where the mouth is clearly visible and reasonably front-on — heavy motion blur or a turned-away face gives the model little to re-animate.
- Get the new audio clean first. The sync is only as good as the track driving it, so remove background noise before you run it.
- Match the new script's length roughly to the original take so the mouth movement is not stretched or crammed unnaturally.
- For dubbing, generate the translated voiceover and check its pacing before syncing, so the mouth timing fits the new language's rhythm.
- Preview at full speed, not scrubbed — sync issues that are invisible frame-by-frame are obvious in motion.
Common mistakes to avoid
- Feeding in a clip where the speaker frequently turns away or is blurred, then expecting a tight sync on every frame.
- Using noisy or clipped audio to drive the sync — artefacts in the sound become artefacts in the mouth movement.
- Writing a replacement line far longer or shorter than the original, which forces the mouth timing out of a natural range.
- Treating lip-sync as a full face replacement — it changes the mouth, not the identity; use face swap for that.
How it compares
- Versus a talking avatar: the avatar creates a whole speaking head from one photo, while lip-sync edits the mouth in real footage you already have.
- Versus re-filming: lip-sync is near-instant and free of scheduling talent, at the cost of some fidelity on difficult angles.
- Versus subtitles alone: subtitles translate the words on screen, but lip-sync plus a dubbed track lets the audience simply watch and listen in their language.
Frequently asked questions
Does lip-sync change the whole video?
It re-animates the mouth to match your audio; the rest of the footage stays as-is.
What is the difference between lip-sync and dubbing?
Dubbing is the whole job of replacing the spoken audio in another language; lip-sync is the piece that makes it look right by re-animating the mouth to match that new audio. VidMints can do both together for a convincing localized clip.
Will lip-sync change the person's face or identity?
No. It only re-animates the mouth and jaw to fit the new audio. The face, background and everything else in the shot stay as they were filmed. To replace the whole face, use the Face Swap tool.
Can I lip-sync an animated or AI-generated character?
Yes, as long as the character has a visible mouth that is reasonably front-facing, you can drive new dialogue onto it from text or an audio recording.
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