Video to Video Lip Sync
video_lip_sync
Estimated from selected length; output follows audio duration
Requires one source video URL and one target audio URL.
Open routeUlazAI - AI Image & Video Tools
Video-to-video voice sync
AI video lip sync generator
Turn an existing talking clip into a synced version with a new voice, translation, narration or vocal track. The source video is trimmed or looped to match the audio length, so this route is best when the face or performer already exists.
8 credits/s. Final output length follows the target audio.
Localizing creator videos without recreating the whole scene.
Replacing a rough voice take with a cleaner recording.
Making product demos or explainers match a final script.
Marketing proof reel
Explanation, examples, and benefits in one launch video
Use this as the fast read before choosing a route: it explains the input logic, shows generated examples, and gives the commercial reason to test the model in Video Studio.
Explanation Pick the route from the input you already have.
Example Watch real generated clips instead of abstract claims.
Benefits Clear prompts, clear pricing, clear next step.
Generated sample
Presenter clip with replaced voice
Input: one public presenter video URL plus one public voiceover MP3.
Prompt
Source presenter video keeps its framing while the spoken line is replaced by the UlazAI launch voiceover.
Where it fits
Lip sync does not invent a new scene from a prompt. It uses your existing video as the visual source and uses the audio URL to drive the mouth timing.
| Duration | 720p / base | 1080p |
|---|---|---|
| 5s | 40 credits | - |
| 10s | 80 credits | - |
| 30s | 240 credits | - |
| 60s | 480 credits | - |
Studio routes
How it differs from text-to-video
Lip sync does not invent a new scene from a prompt. It uses your existing video as the visual source and uses the audio URL to drive the mouth timing.
Production workflow
- Prepare a clean source video with the face visible.
- Upload or host the target audio file as a public URL.
- Paste both URLs in Video Studio and pick the closest duration estimate.
- Review timing, then cut the final result into your ad or social edit.
FAQ
What input does AI Video Lip Sync need?
One public source video URL and one public target audio URL.
How is the final duration decided?
The final output follows the audio duration. If the source is longer it is trimmed; if it is shorter it is looped.