Identify the Face to Synchronize
The video or image establishes the subject, framing, expression, lighting, and visible facial details.
Lip Sync
Match speech audio to the mouth movement of a visible face in a video or image. The Pexo AI video agent coordinates timing, facial detail, expression, and consistency with the video or image.
Face and speech sources
Upload the Visual and Audio
Add the face video or image and the speech recording that should drive the mouth movement.
The Pexo agent uses both files plus any tone or timing instructions as context for one lip-sync task.
Speech matched to a face
Align Mouth Movement with New Speech
Lip Sync uses speech audio to guide mouth movement in a video or image containing a face. The audio supplies the words and timing while the video or image supplies the subject and appearance.
The Agent coordinates the two sources so the speaking motion can be reviewed against both the face and the recording.
Follow the Audio Timing
The recording provides the words, rhythm, pauses, and duration that guide the mouth movement.
Combine the Two Sources
The face and speech become one synchronized video that can be reviewed for timing and visual consistency.
How it works
Create a Lip-Synced Video in 3 Steps
Provide the video or image and speech audio, add any tone or timing instructions, and review the synchronized result against both files.
Upload the Face and Audio
Choose a video or image with a visible face and the speech recording it should follow.
Add Tone and Timing Instructions
Identify the speaker, intended tone, and any part of the recording or visual that requires special attention.
Review the Lip Sync
Check mouth timing, facial detail, expression, identity, and consistency with the original visual and audio.
Agent decisions
Decisions Behind Lip Synchronization
The Agent uses the video or image and speech audio to coordinate mouth movement while preserving the context needed for review.
Audio Timing
Uses words, sounds, pauses, and rhythm in the speech recording to guide the synchronization.
Mouth Movement
Coordinates visible mouth shapes with the corresponding parts of the audio performance.
Facial Consistency
Accounts for identity, expression, head position, lighting, and other facial details in the source.
Review Against Both Files
Keeps both inputs available as references for checking timing and requesting focused corrections.
Common questions
Lip Sync FAQ
What files do I need for Lip Sync?
Provide a video or image with a visible face and a speech recording that the mouth movement should follow.
Can Lip Sync use a new audio track with an existing video?
Yes. Upload the video or image and the replacement speech, then identify the face and any timing that needs special attention.
Can I use a still image for Lip Sync?
A still portrait can be used when the intended result is a talking video. For a complete speaking animation from a still portrait, Talking Photo Generator is the more specific workflow.
What makes a video or image easier to synchronize?
A clearly visible face, stable framing, and unobstructed mouth area give the Agent stronger visual context for review.
What should I verify before using a lip-synced result?
Check mouth timing, identity, expression, facial details, consent, audio and image rights, and whether the result represents the subject appropriately.
Start with the face and speech
Create a Lip-Synced Video with Pexo
Upload the video or image and speech audio, then review timing and facial consistency with the Pexo AI video agent.