Comparison guide
Audio alignment or lip sync: what does a dubbed video need?
A voice can be correctly timed to the scene without matching mouth movement, and the two requirements should be reviewed separately.
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Bottom line: First verify subtitle, speech, scene, and mix timing; add lip-sync review only when the audience and release context justify the extra visual reconstruction.
Decision table
| Dimension | Option A | Option B |
|---|---|---|
| Audio alignment | Speech fits scene and timing | Core dubbing requirement |
| Lip sync | Mouth movement matches target speech | Additional visual processing |
| Review | Listen and watch timeline | Inspect face and shot continuity |
| Best fit | Most localized releases | High-visibility close-up dialogue |
Related theme
Sources and scope. Weydub AI dubbing technology explainer. Checked 2026-08-25. This guide gives conditions and tradeoffs, not a universal ranking.