How to cut a trailer for an online course from a script
Give Vizard Agent the script and whatever footage of the presenter exists. Vizard Agent clones the voice to deliver lines that were never recorded, re-times the narration to real pauses, lip-syncs the existing footage to the new read, upscales the plate and cuts the trailer around it.
What do you type into Vizard Agent?
Paste the script and say what it is for. Vizard Agent works out the pacing, the atmosphere shots and the grade from the words themselves, so the script does most of the briefing and you rarely need to describe the look separately. Settle permission first: the person on screen must agree to their voice and likeness being used this way.
Prompt
What does Vizard Agent actually do?
A course trailer needs the presenter saying the sales script, and the presenter recorded something else. The chain in the middle is the interesting part: clone the voice, re-time it to real pauses, then make the existing footage match the new read. Even spacing is what makes a generated narration sound like a machine reading a list. In the session behind this article it:
- Inspected the footage, measured the content area within the frame and transcribed what the presenter had already said.
- Generated the voice clone, the music and the atmosphere shots in one pass, then measured the voiceover against the clips.
- Read the word timings and the music beats, found the real pauses in the narration and re-timed it to them.
- Lip-synced the presenter's footage to the new narration, verified the face position and upscaled the plate in the background.
- Rebuilt the cut on the upscaled plate with segment lengths locked to the timeline, adjusted the dark grade twice after reviewing frames, built a music duck envelope and re-rendered at 1920x1080, 25fps and exactly 30.0 seconds.
When does this not work well?
Cloning a voice and changing what someone appears to say on camera carries real obligations. Vizard Agent does the technical work, but never clone a voice or lip-sync a face without explicit consent. Lip-sync also has limits: extreme angles and fast head movement resist it, and upscaling recovers sharpness, not detail.
Common questions
Do I need new footage of the presenter? No. Vizard Agent makes the existing footage deliver the new script.
Will the lip movement match? Vizard Agent lip-syncs the plate to the new narration and checks it on frame.
Does it hit an exact length? Yes. Vizard Agent locks the segment lengths to the timeline rather than trimming at the end.