Foliage Moire Effect?

[Maxheadspace]

When I take broad aerial video of wooded areas with my Mavic Pro, I notice a sort of moire effect, where the leaves in trees seem to wax and wane in brightness, almost flashing in some cases. After seeing it in my own footage during editing, I've noticed it in other people's Mavic videos on YouTube, primarily forward moving video over wooded areas. I know it's common with screens, roofs, house lines, etc, but this is the only situation where I've seen it in foliage. It makes this video unusable for commercial purposes. Has anyone found settings that will eliminate or reduce this effect? I'm shooting UHD 29.97 with various shutter/ISO settings.

Thanks!

 

[Xtreme Drone Pilot]

You need to slow down the shutter with ND filters, ideally, to 1/60s. You're seeing moire because each frame is so sharp. (you won't see it in a still)

 

[Lake_Flyer]

Moire can be reduced by slightly lowering sharpness and/or contrast in post. Experiment and find the sweet spot. You can also set the camera to a lower sharpness but that might add the dreaded water colouring effect (specially in foliage). I prefer to keep it at 0 myself.

Flicker is reduced by using ND filters to be able to lower the shutter speed to no more than twice the frame rate. So with your frame rate ideally you should have a shutter speed of 1/59,94. I'd choose 1/50. Only slightly above twice the speed already causes a hint of flicker.

 

[Maxheadspace]

Thanks for the feedback. I just received an ND kit and was starting to experiment with the various filters.