How to tell why the new version looks identical to the old one
Tell Vizard Agent that you cannot see a difference, and ask it to prove one either way. It pulls frames from both versions and compares them, which settles whether the change was simply too subtle to notice. It also checks the delivered file's own duration and frames, because a link pointing at the previous render looks exactly like a change that never happened.
What do you type into Vizard Agent?
Report the observation, not a re-do. Asking for the change again gets you another render that may look just as identical. Asking why they look the same gets you the reason, and only one of the two reasons is fixed by editing. Have both versions, or both links, to hand so Vizard Agent can compare them.
Prompt
What does Vizard Agent actually do?
It treats "that's the same video" as a symptom with two causes that need opposite fixes. Either the edit changed by less than a viewer can perceive, or the thing being watched isn't the new edit at all. In this job both causes were present at once, which is more common than either on its own. In the session behind this article it:
- After two rounds of revision came back looking unchanged to the reviewer, read the existing edit data so the new version built on it, and rendered the revision.
- Pulled a contact sheet from both versions, compared the cutting rhythm, and measured each one's duration.
- Found where the change was too subtle to read. A slightly faster cut is invisible, while a shot that starts on a different frame is not.
- Rebuilt more decisively where the change had been too small, and uploaded the genuinely new version.
- Checked the export's own duration and a frame to confirm it was the new one, since a delivered link can point at a previous render.
When does this not work well?
Some changes are real and genuinely imperceptible. Audio adjustments, small loudness moves and subtle colour tweaks may not show on sampled frames at all, so comparing pictures can't settle whether Vizard Agent made them. On very long videos the change may fall between sampled frames, and a cached player may still be holding the old file.
Common questions
Can it prove the versions differ? Yes. Vizard Agent compares frames and durations from both of them.
What if the change is audio only? Then Vizard Agent compares waveforms and loudness instead.
Should I just ask for a bigger change? Not until you know which cause it is. One of them isn't an edit problem.