I also reduced the brightness on the base layer by 100% (referring to Lumetri Scopes and using my eye to avoid blowing out the slide image). Working in Premiere Pro, I layered the video 3 times, cropped each layer to the projection screen area, reduced each layer to 25% opacity and advanced each layer 1 frame on from the last. I've just had the same problem with a single chip DLP projector image in shot with the banding looping over about 5 frames. RED actually has a great tool called Flicker Free Video (available on its website or on the free RED Tools app) which makes the calculations for you.Tomh's advice to double stack the video layer, reduce opacity by 50% and advance a frame is a great starting point and certainly works well on fluorescent light flicker.

However, if that doesn't work or if you're shooting high-speed video, you'll have to carefully calculate your camera settings in relation to your light source's pulse frequency. So, if you're shooting at 24 fps with a shutter speed of 1/50, you can go down to 1/40 (or whatever's closest) and completely remove that strobe effect. If a light source is the culprit, you can change the bulb or go with a natural, continuous light source, but if it's a TV, computer, or another type of screen that's causing you trouble, you can also usually slow down your shutter speed a touch to eliminate it. Typically this is more of a high-speed video issue, but it does occasionally happen when shooting at 24 fps or 30 fps and there are a few ways to avoid it. When your camera's shutter speed and frame rate don't line up perfectly with the frequency of these pulses, you've got some nasty flickering on your hands.

You see, though the light emanating from certain lighting units may appear to be continuous, many bulbs are actually giving off pulses of light. If you've ever encountered flickering, or 'banding,' in your videos and wondered why it's happening, the reason deals with the interaction between light sources and camera settings. However, this method does leave you with an image that isn't perfectly sharp, so the best thing to do, if you can, is to take certain precautions to avoid flicker altogether. The technique used in the video is awesome for those who may have miscalculated their camera settings, didn't realize there was an incandescent or fluorescent bulb on set, or just simply didn't know flicker even existed.

Still image flicker premiere