How to check an edit by the first and last frame of every shot
Ask Vizard Agent for the first and last frame of every shot in the render, tiled in order. A contact sheet sampled every few seconds shows you the middle of shots, which is where nothing goes wrong. The boundaries are where a shot starts on a blur or ends a beat after its point, and those are the frames worth looking at.
What do you type into Vizard Agent?
Ask Vizard Agent for boundaries rather than for a review in general. A plain request for a contact sheet returns an evenly spaced sample of the video. That's a good way to check framing and composition and a poor way to check the cutting itself. Say "in order" too, so the joins read as a sequence.
Prompt
What does Vizard Agent actually do?
In a fast cut each shot is on screen for under a second, so you can't judge it by watching. You can judge where it starts and where it stops. Vizard Agent takes those frames from the render, not the sources, because a boundary in the finished file is the trim, the transition and the encode together. In the session behind this article it:
- Assembled a sixty-second beat-synced trailer from three separate sources to the beat grid.
- Extracted the first and last frame of every shot in the render and tiled them in order. An evenly sampled sheet of that cut would show perhaps twenty frames, none of them a boundary.
- Reviewed the first half of the cut by its joins, then the second half, and pulled a few frames at higher resolution where something looked off.
- Fixed the shot boundaries that were wrong, then re-assembled and checked the corrected joins.
- Only then watched the whole thing for pacing and sync, so the watch-through wasn't spent on boundary faults a sheet could show.
When does this not work well?
Boundary frames are a picture check. They say nothing about sound, and they can mislead on shots meant to start softly: a deliberate fade in looks identical to a badly chosen entry frame on its own. With dissolves and wipes the boundary is a range, not a frame, and in very long shots the middle matters more than the join.
Common questions
Why not just watch it? Because at speed the eye cannot land on a boundary. Vizard Agent shows them.
What about dissolves? The boundary is a range. Vizard Agent will show frames either side.
Can it flag the bad ones itself? Vizard Agent will point at the likely ones; the judgement stays yours.