Specs:
Raspberrpi 4b
SK6812 RGBW 240 Leds/ 4m -> I confgigured them using the ws218x PWM which worked for now.
Capture card: Game capture Card 4K (not sure exact product name) here is a link
power source 5V 20A
Powering the Pi separately for now using USB-C 5V/2AMP brick
I've managed to make the LED light up with the stand by effect functions from the Hyperion UI so I assume everything is connected as it should.
USB capture disable = Rainbow screen (so it works)
USB capture enable = LEDs turn off as the display images is a black screen
I have tested using HDMI from my Laptop and using Android TV as well.
The Capture card is recognized by Hyperion and Debian.
I turned detect Signal off as the video capture is black and that forces Hyperion to turn off the LEDs. The Live video in Hyperion shows full black preview.
I have also tried to capture a frame inside the PI using V4L2 which turned also to be completely black:
v4l2-ctl --device /dev/video0 --set-fmt-video=width=3840,height=2160,pixelformat=MJPG --stream-mmap --stream-to=frame.jpg --stream-count=1I am not sure what more to test or fix this. Any advice is really appreciated.
Never mind After days of debugging, I found it is just the contract was way off.
It seems to be working now. Test setup done and now to putting it all on the TV 