How to stabilise, grade and re-cut a shaky phone video
Upload the footage and tell Vizard Agent to clean it up and re-cut it. Vizard Agent maps the footage second by second, stabilises and grades each beat, measures the brightness of every shot to balance them against each other, and checks the stabilised frames for black edges before delivering.
What is the short version?
Cleaning up phone footage is three jobs that interfere with each other: stabilising introduces black edges, grading exaggerates the difference between shots filmed in different light, and adding zoom moves changes the framing you just stabilised. Doing them in the wrong order means redoing them.
- Go to Vizard Agent and upload the footage.
- Say what to fix — the shake, the colour, the pacing.
- Say the length and where it is going.
What do you need before you start?
The footage and a target. Vizard Agent maps the shots, chooses the beats and applies the treatments itself, so a single unedited clip is a complete input. Saying what the video is for helps, because it decides which moment becomes the opening and how hard the cut should be.
- The footage. One clip or several, however shaky.
- What bothers you. The shake, the colour, the flat pacing.
- The length. Around thirty seconds for a social cut.
- The hook. What should open it, if you know.
- The shape. Vertical for feeds.
What do you type into Vizard Agent?
List the treatments and the outcome. Vizard Agent handles enhancement, stabilisation, grading and re-cutting as one job with a deliberate order, so asking for all of them together produces a better result than requesting them one at a time.
Prompt
Variants worth knowing:
- Subtle zoom moves. They give static handheld shots somewhere to go.
- A chosen hook frame. Vizard Agent will find the strongest eye-contact moment.
- A softer ending. Rather than cutting hard on the last shot.
What does Vizard Agent actually do?
Here is the order Vizard Agent worked in on a real clean-up job. It rebuilt the cut five separate times, and every one of those rebuilds fixed something that only became visible once the previous version actually existed to be looked at.
- Probes the file, checks its rotation and analyses the content, audio and image quality.
- Builds a timestamped frame map at one frame per second and reviews the footage across both halves.
- Checks the available stabilisation and enhancement filters.
- Cuts, stabilises and grades the seven beats, then applies the zoom moves.
- Reviews the finished cut and zooms into two problem stretches in the source.
- Rebuilds with better shot choices, then fixes the opening framing and eases an over-blue tint.
- Re-renders with predictable stabilisation and checks specifically for black edges at the frame boundaries.
- Finds the best eye-contact frame for the hook and rebuilds with the new opening order.
- Measures the brightness of every shot, balances them against each other, lifts one underexposed shot, softens the ending and compares the final detail and brightness against the source.
Step 9 is the one that makes a multi-shot cut look intentional. Shots filmed minutes apart sit at different exposures, and grading them individually to look good leaves a cut that flickers between them until somebody measures and balances them.
What does the result look like?
From the run this page is written from, probed on the delivered file: 1080x1920, H.264, 30fps, 28.5 seconds, AAC audio. Vertical, twenty-nine seconds, seven beats stabilised, graded and balanced to a common brightness, with subtle zoom moves, an eye-contact opening and a soft ending.
Twenty-nine seconds from a longer take is the re-cut doing its job. Vizard Agent kept the beats that hold and dropped the stretches it had zoomed into and rejected, which is why the finished cut has no dead patches in it.
When does this not work well?
Every treatment described here is a repair rather than an improvement, and repairs have limits that were set when the recording was made. Vizard Agent measures the footage before and after each stage so you can see what actually changed rather than trusting the name of a filter.
- Stabilisation costs frame. It crops to hide the shake, and heavy shake costs a lot of picture.
- Upscaling recovers sharpness, not detail. A soft source stays soft underneath.
- Grading exaggerates differences. Which is why brightness has to be balanced across shots afterwards.
- Zoom moves fight stabilisation. They have to be applied to the stabilised frame, not before it.
- A bad shot stays bad. Vizard Agent will drop it rather than repair it beyond use.
How do you fix a result that came back wrong?
Name the shot or the moment. Vizard Agent keeps the frame map, the brightness measurements, the stabilised renders and the hook candidates, so re-ordering the beats or lifting one shot is a re-render against work it already did.
- "The opening is not the strongest moment." Re-ordered from the hook candidates, as here.
- "That shot is darker than the rest." Lifted against the measured brightness.
- "There are black edges at the top." Re-stabilised with a tighter crop and re-checked.
How does Vizard Agent compare to doing it yourself?
By hand this means applying a stabiliser, applying a preset grade, adding a zoom, and exporting. The black edges then show up along one side, the shots do not match each other in brightness, and fixing either one means undoing the zoom you added last.
| By hand | Vizard Agent | |
|---|---|---|
| Order of operations | Whatever you think of first | Stabilise, grade, then zoom on the stabilised frame |
| Black edges | Notice them later | Checked at the frame boundaries deliberately |
| Shot-to-shot brightness | Grade each to look good | Measured per shot and balanced across the cut |
| The opening | The first clip | Best eye-contact frame chosen deliberately |
Common questions
Can Vizard Agent fix heavy shake? Within limits. Stabilisation crops to compensate, so severe shake costs a noticeable amount of picture.
Will upscaling make it sharp? Sharper, not more detailed. Vizard Agent compares the result against the source so you can see the actual difference.
How much footage do I need? One clip is enough. This run cut seven beats out of a single recording.
Does Vizard Agent choose the opening? Yes. It looks for the strongest eye-contact frame rather than starting where the recording did.
Why measure brightness shot by shot? Because grading each shot to look good in isolation leaves a cut that visibly steps between exposures. Measuring them and balancing to a common level is what makes several shots read as one video.
What are black edges and why do they matter? Stabilisation shifts each frame to cancel the shake, which can expose the edge of the picture. Vizard Agent checks the boundaries and tightens the crop rather than letting a black sliver flicker along one side.
Can Vizard Agent add zoom moves? Yes, subtle ones, applied after stabilisation so the two do not fight.
Will the ending be abrupt? Not if you ask. Vizard Agent softened the close on this run rather than cutting hard.
Can I keep the original audio? Yes. The clean-up here is visual unless you ask for the sound to be treated too.
Does Vizard Agent check the finished cut? Yes, repeatedly. This one was rebuilt five times, each pass fixing something the previous version revealed.