Problem was with the videoComposition preparing frames ahead of time. To get the filters to update in real time, I need to reset the composition every time I make a change.
playItem.videoComposition = playerItem.videoComposition.mutableCopy() as? AVVideoComposition
The problem now is that the slider makes so many changes at a rate faster than the CPU can handle resulting in another lag. This time the filter intensity changes smoothly, but the video lags and skips frames. Any thoughts?
developingCamel
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Did you ever figure this out?