How to change how far a movement goes without breaking the motion
Tell Vizard Agent which movement should go further and by how much. It rebuilds only the window of frames that contains that movement, narrows the window when a seam starts to show, stitches it back with the original audio, and then checks the frames on both sides of every boundary against the original's own clean motion.
What do you type into Vizard Agent?
Name the action and the direction. This request converges over two or three short rounds, so the first message doesn't need to be precise. It needs to be about the right thing, the movement rather than the shot. "A bit lower", then "a tad lower still" works fine, because each round costs Vizard Agent only the window, not the shot.
Prompt
What does Vizard Agent actually do?
Changing how deep a squat goes, or how far a door opens, is a change to a few dozen frames, not to a shot. Rebuild the whole shot and everything else drifts. Rebuild only the window and the only risk left is the two joins, which are examined as frames rather than judged at speed. In the session behind this article it:
- Sampled frames to see how far the movement went and checked the timing of the action, then checked whether the tools supported a pose change rather than only retiming, and what it would cost.
- Rebuilt only the section containing the movement, checked it for continuity, framing and naturalness beside the original, and recombined it with the original audio.
- Narrowed the window to just the lowering and the bottom when the first attempt left a seam, and regenerated it with no extra scene changes.
- Stitched the narrower window into the original footage with continuous audio and inspected the frames immediately around both boundaries.
- Rechecked the movement at higher sampling and compared the middle of the edit against the original's clean motion.
When does this not work well?
The movement has to be the only thing changing. If the camera moves during the action, something passes in front of the subject, or the change is big enough to alter the whole body's balance, the rebuilt window stops matching what surrounds it. Fast movements give fewer frames to work with, and loose clothing or hair is hard to keep consistent.
Common questions
What causes the glitch in the middle? A window wider than it needs to be. Vizard Agent narrows it.
Does the audio change? No. Vizard Agent keeps the original track underneath.
Why not just describe the shot better? Because a better description produces a different shot, and what you wanted was this shot with one thing changed.