Replacing an audio clip does not necessarily replace the photographed mouth movement. First confirm that the actual soundtrack now contains the approved new words. If it does, the remaining mismatch belongs to the visible performance, not to transcript correction. Decide whether the current workflow can regenerate that picture or whether the shot needs a new take or an approved editorial alternative.
Compare three separate objects
Keep the approved sentence, the new audio and the current face shot identified separately. Solo the new sound through a complete phrase. Then watch the picture muted. If the new recording says a different word while the lips repeat the old articulation, changing the caption again will not fix the image.
Descript's Regenerate overview distinguishes Audio only from Audio & video and documents limits for video regeneration. At the review date, it describes English support and excludes visual regeneration for certain contexts, including unclear faces and multi-speaker recordings. Check the current eligibility of the actual shot. These conditions describe Descript, not a promised Imagild lip-sync feature.
Diagnose timing or different articulation
A constant delay may be corrected by alignment when the mouth already performs the right sentence. A different sequence of visible closures and openings is a different problem. Sliding the entire audio earlier can align one syllable while making the rest less credible.
Use an invented revision from “meet on Monday” to “meet on Friday.” Record what the approved audio really says and which part of the visible performance contradicts it. The example illustrates the review method; it is not a measured claim that one word pair always exposes a mismatch.
| Observation | Decision to investigate |
|---|---|
| Right articulation, uniform delay | Check clip alignment |
| Old word shapes remain | Replace or regenerate the visual performance |
| Face becomes distorted after processing | Reject that visual version |
| Face is hidden or several speakers overlap | Check supported workflow or use another shot |
Choose a defensible replacement
For an eligible, authorized face shot, use the tool's actual visual regeneration route and review its returned picture separately from its audio. A generated status does not approve the teeth, jaw, facial identity or expression. Inspect the changed phrase and the transition back into untouched footage.
If that route is unavailable or unsuccessful, record a new take when practical. A cut to an already approved explanatory image can cover a short repair, provided it preserves the event and does not fabricate documentary evidence. Do not silently change a contributor's meaning to make the mouth easier to match.
Prepare the line and intended visible speaker in an Imagild film plan, then complete the actual audio and picture work in supported tools. Approve the result with sound on and off: the sentence must be correct, the visible speaker must remain the same person, and there must be no residual old voice or abrupt facial jump. Preserve both versions so that later reviewers know what was changed.