Existing video, replacement audio
Replace a video voiceover and match the mouth to it.
LipSync is for the point after you already have both inputs: an existing talking video and a new, authorized voice track that should appear to be spoken on camera.
Try the free previewBring an audio track you own. No account required for the free preview.
What the sample proves
The audio drives the new mouth movement.
Both versions use the same presenter footage. Switch the line to see why replacement audio should be close in duration and clearly spoken.
Three steps
Bring the inputs. Keep control of the words.
Choose a talking-head clip
Use an MP4 or MOV with one visible, evenly lit face.
Bring the replacement audio
Use clean speech without music or overlapping voices; MP3, WAV, and M4A are supported.
Create a lip-synced MP4
The free preview accepts up to 8 seconds of replacement audio.
A good fit
Use it when
- An approved revised voice track
- Clear speech with no background music
- A source video at least as long as the new audio
Keep in mind
Not the right tool for
- Generating, cloning, cleaning, or translating audio
- Music videos, animals, or heavily hidden faces
- A source clip shorter than the needed performance
Use cases
Find the right starting point
Every workflow starts with the same two inputs: one clear speaker and audio you are authorized to use.
Change words in a video
Got one outdated number, name, date, or sentence in an otherwise good recording? Bring a replacement audio line and match the mouth to it.
See how it works Use caseUpdate a product demo video
When a launch date, product name, or offer changes after filming, a new audio line can keep a usable presenter segment from becoming outdated.
See how it works Use caseReplace a video voiceover
LipSync is for the point after you already have both inputs: an existing talking video and a new, authorized voice track that should appear to be spoken on camera.
See how it works Use caseLip sync an AI presenter video
If you already have a clean, single-speaker AI presenter video, you can bring it together with approved replacement audio. LipSync does not create the presenter or the voice.
See how it works