I have a lightberry 4K kit for RPi2 and have noticed that the LEDs have a little (but unaceptable) delay when reacting on sudden changes in brightness when using the external framegrabber. I have tried both the USB and GPIO version with same result.
When using KODI (or rasplex) direct the delay is much smaller and acceptable but I want to use Plex on ATV4 so this in no option.
I guess it could maybe be a hardware thing with the grabber delaying the signal a bit while grabbing???
Does anyone experience the same issue and maybe even have an idea what to do?