How to fix jello and vibration in DJI Mini 4 Pro footage

Jello in DJI Mini 4 Pro footage, the wavy, wobbling look in the picture, is vibration reaching the camera. The usual causes are a chipped or loose propeller, strong wind or filming in Sport mode. Inspect and replace the props first, then film in Normal or Cine mode. If the jello started after a crash, the gimbal may be damaged.

Fix Mini 4 Pro jello — Start with the props: they cause most vibration. Wind and Sport mode come next, and a damaged gimbal is the last thing to rule out.

Why it happens

The camera reads each frame line by line. When it shakes faster than the gimbal can cancel, straight lines bend and ripple. The gimbal handles slow movement. It can't remove a fast buzz from an unbalanced prop or motors straining in gusts.

At 249 g the Mini 4 Pro feels wind more than heavier drones. DJI rates its wind resistance at 10.7 m/s and says slight vibration is expected in strong wind because of its light weight.

Fixes, easiest first

Inspect the propellers. DJI says to check before every flight for cracks, wear, warping, corrosion and loose screws, and to replace props that show any of them.
Check the screws. The Mini 4 Pro's props are screwed on. Use the screwdriver from the box and make sure each screw is snug.
Replace correctly. Remove both blades and screws from a motor and fit new ones. Put marked props on marked motors and unmarked on unmarked. See Mini 4 Pro propellers.
Clean the props. Dirt on a blade unbalances it.
Skip Sport mode for filming. DJI's manual says you may see minor tremor in videos recorded in Sport mode.
Watch sideways flight in wind. DJI limits speed and tilt when the Mini 4 Pro flies left or right to keep shots smooth, but in strong wind it lifts those limits to fight the wind, and the gimbal may vibrate. Fly lower or wait for calmer air.
Remove add-ons. A propeller guard or anything attached to the body changes how the drone vibrates.
Calibrate. If footage also tilts, see Mini 4 Pro horizon not level.

Camera settings that help

Jello shows more at very fast shutter speeds, because each frame freezes the shake. A shutter around double the frame rate (1/50 or 1/60 s at 25 or 30 fps) adds motion blur that hides small vibrations. In daylight you'll need an ND filter for that: see Mini 4 Pro ND filters. This hides minor buzz but won't fix a bad prop.

When it's the gimbal

If jello stays with new props in calm air, or appeared after a crash, the gimbal's dampers or a motor may be damaged. Look for a camera that sits crooked or buzzes. That needs a repair, covered by DJI Care Refresh for crash damage.

For other models, read wavy jello drone footage. If you fly in wind often, a heavier drone helps: compare the Mini 4 Pro and Air 3S.