smoothing means: collect colors for a certain time and set calculated median color to leds. As the nature of median color is, that mostly darker colors gets more attention then brigther colors. That causes some delay, until brighter colors settle.
The other thing is you have blackborder detector activated. This feature is more for movies, then for desktop usage. I recommend to disable it.
In case you are using the min luminance there is a known issue with "color hang"
@redPanther
Could this be a result of the stopped output?
if "updateDelay" in smoothing is used, this would always freeze colors earlier as it should. if updateDelay is not used, it should work as expected - or better say I didn't notice any problems with that and the code looks good to me in that case.
I will make a fix in hyperion repo for updateDelay issue
@HalbesHaehnchen
> I handle the backlight settings directly with v4l2 values.
how you do that? I/we investigate a similar/same? issue here: https://hyperion-project.org/t…ng-problem.271/#post-2192
Latest update fixed the problem for me. Thank you!
My solution to get the backlight I want was pretty simple 
raise the brightness of the captured picture. I did not want "full black" to emit light, but still darker colors to get noticed by hyperion.
These are my current settings
v4l2-ctl --set-ctrl=chroma_agc=0
v4l2-ctl --set-ctrl=chroma_gain=65
v4l2-ctl --set-ctrl=saturation=60
v4l2-ctl --set-ctrl=brightness=172
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