01Split sound into four layers
Dialogue carries facts and narrative; ambience creates space; action effects give events weight; music governs emotion and pace. All four need not appear, but each layer needs a job. Verify important wording word by word, let rain, crowds or room tone establish place, add doors, footsteps or a cup landing where needed, and never let music cover dialogue or rely on an unlicensed hit song.
02Choose native audio or post-production
Native audio can make image, action and sound feel naturally joined, but a single wrong word is hard to repair independently. In product, legal-information or teaching video, exact wording matters more than accidental realism. Generate dialogue-free imagery first, then use your own recording, a licensed voice or captions for the factual layer.
03Treat lip sync as a short-shot task
Lip sync is not simply attaching an audio track to a face. A clear frontal face, steady light, limited occlusion and natural speed work best; rapid turns, hands over the mouth, many simultaneous speakers and extreme expressions increase failure. Work one short sentence per shot, then check every word, audio delay and expression. Never create plausible speech with a real person's unpermitted face or voice.
04Edit by deleting, ordering and emphasizing
Editing deletes broken or slow frames, orders shots by narrative function, then uses sound, captions and transitions to emphasize the point. Do not keep a weak clip because it cost credits. CapCut is practical for fast vertical work; DaVinci Resolve supports fuller editing, grading and mixing. The common job is to unify aspect ratio, frame rate, colour, volume and captions.
05Watch the export on a phone
A timeline that works on a computer may fail on a vertical phone screen, a speaker or after platform compression. Review on the actual publishing device: ratio suits 16:9, 9:16 or square; captions stay in the safe area and remain readable; dialogue is clear without a loud opening; the first two seconds contain information and the ending leaves reading time; facts, identities and product details are checked one by one.
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