How to recolour an object in a video and replace its soundscape
Tell Vizard Agent which object to recolour and what the audio should become. Vizard Agent finds the segments the object appears in, tests several colour approaches on stills first, checks whether the change bled into the on-screen text, and rebuilds the soundtrack as effects instead of music.
What do you type into Vizard Agent?
Name the object, the colour and the audio in one instruction, and add the new title if the old one shouldn't survive. Vizard Agent handles all of it as one job and sequences it sensibly. Splitting it into three requests costs you the passes where it checks whether one change damaged another.
Prompt
What does Vizard Agent actually do?
Almost everything before the render is a test on a still frame, which keeps a selective colour change from spilling across the whole picture. A selective colour filter doesn't know the difference between the machine and the caption next to it, so Vizard Agent looks at the text after the change instead of assuming it survived. In the session behind this article it:
- Probed the video, sampled frames across its full length and found the segments containing the machine, narrowing their start and end points to the second by sampling every half second around the cuts.
- Tested three colour approaches on stills, a straight adjustment, a high-precision pass and a selective-colour filter, and looked at each result.
- Checked whether the recolour had changed the on-screen text, then removed the old title and tested four title treatments.
- Generated the vehicle and river-ambience sound effects, balanced them and measured the combined loudness.
- Rendered the recoloured cut with the new audio, built a quality-control sheet, refined the text timing and re-rendered. The delivered file was 1280x720 at 30fps and 14.53 seconds long.
When does this not work well?
Recolouring is not replacement. Vizard Agent changes how an object looks in the frames you already have, not what it is, so asking for one brand of machine to become another gets you the first one in a new colour. Anything else in frame near that hue can shift too, and fast-moving edges hold the original colour longer. Recolouring also can't turn a road into a forest; that needs generated shots.
Common questions
Can it change the object into a different one? No. Vizard Agent changes the colour; the object stays what it is.
Will other things in frame change colour? Similar hues are the risk, which is why Vizard Agent tests on stills first.
Can it remove the old on-screen text? Yes. Vizard Agent checks whether the recolour affected it, then removes and replaces it.