As it took me a while to find the right components to support 4K HDR at 60 HZ which does nicely fit in a casing, i will share the components used here:
Hardware 194,35 Euro
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Pi Zero WH
Grabber
4k Scaler
Converter
Power Supply
DC Stecker
Cinch Cable
SD Card
LED Strip https://www.ebay.de/itm/361662919560?var=630994738442
Material 77,50 Euro
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Casing
Power Cable
Micro-USB
3x HDMI
USB OTG
USB Socket
2x HDMI Socket
Connectors from left to right, top to buttom:
Power In, HDMI in, HDMI Out, LED Strip DATA Out (5V not connected), Power Out 1, Power Out 2
I am using two Power-Outs to support power supply for two corners of the strip.
The USB is used as data transfer (only data pins + ground connected).
Using this successfully with 2M USB cable from Box to Strip.
If you are using the whole LED strip, maybe a slightly bigger power supply is needed.
For the power supply of grabber, converter and scaler i did cut the usb cabels on connect them to the power supply.
Software running is hyperion-ng.