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
The video contains at least 10 seconds of clear, unobstructed footage of the speaker's face for the AI to process the lip-sync accurately.
Lip-Sync is not needed for voice-over style content where the speaker is off-screen (screencasts, product tours, animations).
Related articles
When should you turn on lip-sync? — the full decision framework.
Lip-sync limitations and workarounds — requirements and limits in detail.