How to straighten a shot when you cannot tell which way it leans

Last updated 2026-09-15 · 8 min read

What is the short version?

Handheld footage from a walk-around is rarely level, and a small consistent lean reads as amateur without ever announcing itself. You watch the cut back, decide something about it is off, and cannot put a name to what you are seeing — so the shots ship as they are and the whole sequence keeps feeling slightly cheap.

1. Ask Vizard Agent which shots are tilted and by how much.
2. Let it test both rotation directions before choosing.
3. Check the result on frames, not at playback speed.

What do you need before you start?

The cut or the rushes, and a straight line somewhere in the world. Vizard Agent measures tilt against what should be vertical or horizontal in the frame, so a shot of open sky and grass gives it nothing to work from, while a street with buildings gives it plenty.

• The footage. Rushes or an assembled cut.
• Something straight in frame. Buildings, poles, horizons.
• How much crop you accept. Rotation costs edge.
• Which shots matter. Or ask for all of them.
• A delivery frame size. It sets the crop budget.

What do you type into Vizard Agent?

Ask for a measurement first and a fix second. If you open with "straighten the wonky shots" you get an answer that depends entirely on Vizard Agent agreeing with your sense of which ones are wonky, and the whole problem is that this sense is unreliable at small angles.

Prompt

Variants worth knowing:

• "Measure against a grid." Turns a feeling into a number.
• "Test both directions." Stops a confident wrong fix.
• "Show me the frames." Judgement at rest, not in motion.

What does Vizard Agent actually do?

Here is the sequence on a real walk-around sequence where several shots leaned. The striking part is step three: even with a measurement in hand, Vizard Agent verifies the direction rather than assuming the sign of the number was right.

1. Measures how tilted each shot is.
2. Checks every shot against a grid so the numbers are comparable.
3. Judges the tilt shot by shot on frames rather than in playback.
4. Compares the two straightening directions side by side.
5. Verifies which way to straighten before applying anything.
6. Tests the correction on two shots first.
7. Chooses the amount by comparing the results.
8. Re-renders with those shots levelled.
9. Reviews the new cut with level guides still visible.
10. Tests the remaining shots for tilt and levels them too.

Step two is what makes this more than an opinion. A grid laid over the frame turns "this feels off" into a figure you can compare across shots, and a shot that measures half a degree gets left alone instead of being rotated for no reason.

Step five looks redundant and is not. On a shot with a sloping street or a leaning subject, the thing that reads as the horizon may not be level in reality, so Vizard Agent confirms the direction against the frame before rotating anything.

Step nine keeps the guides on for the review. Checking a levelled cut without them means trusting the same eye that missed the tilt in the first place, so the grid stays up while the new version is inspected.

What does the result look like?

A sequence that stops nagging at you. The buildings stand up, the cut feels composed rather than snatched, and Vizard Agent tells you which shots it rotated and by how much, so the change is a record rather than a mystery.

When does this not work well?

Some shots have nothing to measure. Vizard Agent needs a reference in the frame that ought to be straight, and a shot of sky, sea or a moving crowd offers none, so there is no honest answer to give — Vizard Agent will say that rather than invent a correction and quietly rotate the shot anyway.

• No straight reference. Sky, sea, sand, crowds.
• Deliberately canted shots. A dutch angle is a choice.
• Tilt that changes mid-shot. That is drift, not lean.
• Very tight framing. Rotation crops away too much.
• Sloping ground. The world leans, not the camera.

How do you fix a result that came back wrong?

Name the shot and what you see. Because Vizard Agent measured each shot separately rather than applying one correction to the sequence, a complaint about one shot changes only that shot, and it can show you the measurement it worked from.

• "This one now leans the other way." The amount is reduced.
• "It cropped too much." A smaller correction is tested.
• "That shot was meant to be canted." It is excluded and left alone.
• "Shot four still looks off." Re-measured against the grid.

How does Vizard Agent compare to doing it yourself?

By hand you nudge the rotation slider until it looks right, which works on an obvious ten-degree lean and fails on the small ones, because after thirty seconds of staring your eye adapts and the tilted version starts to look correct. That adaptation is the whole reason these shots ship.

Common questions

Why can I not just see the tilt? Because your eye adapts. Vizard Agent measures instead, which does not.

How much tilt is worth fixing? Vizard Agent gives you the numbers so you can draw the line yourself.

Does straightening crop the shot? Yes, slightly. Vizard Agent reports how much it cost each shot.

What if a shot has no straight lines? Vizard Agent says it cannot measure that one rather than guessing.

Can it do the whole sequence at once? Yes, though Vizard Agent measures each shot separately so they stay individual.

Why test both directions? Because a sloping street can make the correct direction look wrong.

Will it fix shaky footage too? That is a different problem. Ask Vizard Agent about the shake separately.

What about a deliberate canted angle? Tell Vizard Agent which shot it is and it leaves that one alone.

Does it change the framing? The crop shifts slightly. Vizard Agent checks the subject is still framed.

Can I see before and after? Yes. Vizard Agent compares the frames rather than asking you to watch twice.

What if the tilt drifts during a shot? That is drift rather than lean, and Vizard Agent flags it as a different fix.

Does this work on vertical video? Yes, and the crop cost is higher, so Vizard Agent reports it per shot.

Should I fix tilt before or after the cut? Either. Doing it on the cut means Vizard Agent only handles shots you kept.

Will the guides show in the delivered file? No. Vizard Agent uses them for review and renders the clean version.