Lip-sync: The basics
Lip-Sync is Dubly.AI's feature that re-animates the speaker's mouth to match the translated audio. The result: a dubbed video that looks like it was filmed in the target language.
When to use Lip-Sync
Lip-Sync is recommended when:
The speaker is visible on camera (interview, selfie video, presenter shot)
The mouth is clearly visible for most of the shot
You want the highest-quality, "native-feeling" result
Lip-Sync is not needed for voice-over style content where the speaker is off-screen (screencasts, product tours, animations).
Requirements for best results
Resolution: 720p or higher
Face size: speaker fills ≥ 10% of the frame
Stable footage: avoid rapid zooms or motion blur on the face
Heavy head movement or hair covering the mouth can reduce quality.