I got a captured video, it has a slight 3 frame colour balance cycle. lighter, normal, darker then repeating. it's not really that visable, but looking at light lighter objects you notice a slight strobe type effect. is there any way i can solve this?
How on earth did you end up with something like that?
If it's really *exactly* 3 frames, I'd create a 3-frame "correction" event that I'd put on the track above, using whichever transfer mode worked best (add, or multiply, I'm guessing).
Create this correction event by fixing 3 sequential frames yourself, using the add or multiply mode with single frames of the Solid Color generator. Once these 3 frames are corrected, solo the "fixer" track, time select those 3 frames, and render an uncompressed AVI of them. Then, unsolo and bring in that rendered event after the 3 frames you created manually, and stretch the event for the duration of your video. This will apply the same corrections to each iteration of the 3 frames.
If it's not exactly 3 frames, this won't work. In that case, your options are limited, but if there is not much motion, you could apply a huge amount of motion blur, which would smooth out the flicker, but would cause all motions to be blured.
Or, if the flicker rate is constant, you could align 3 copies of the video, 120 degrees out of phase with the flicker, and sum them together (first, set each's opacity to 33% so the sum is 99%).
I'd need to see the clips before I suggest any more hairbrained ideas.
If none of these apply, because the flicker rate changes over time, just convince your audience that it's an artistic effect <g>.