kris777

OK...I think it worked in OrangePi3 LTS 🙂 ...first, clean up the remnants:
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sudo apt purge v4l2loopback-dkms
sudo apt autoremove
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armbian-config
then I had to switch to a different kernel: edge:6.15.4-edge-sunxi64 ....then update the system: apt update / upgrade / reboot ! install from GitHub:  v4l2loopback and then:
cd ~/v4l2loopback
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VERSION=$(grep -oP 'PACKAGE_VERSION="\K[^"]+' dkms.conf)
sudo cp -r . /usr/src/v4l2loopback-$VERSION
sudo dkms add -m v4l2loopback -v $VERSION
sudo dkms build -m v4l2loopback -v $VERSION
sudo dkms install -m v4l2loopback -v $VERSION
dkms status
sudo modprobe v4l2loopback
ls /dev/video*
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I guess it's OK now:
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But in my opinion the module is not working properly 😞
I'll be more precise, it works OK... but OrangePi3LTS is a weak device and the option/module: v4l2loopback and the ffmpeg program that transmits/splits the image to two programs (motion/ustreamer) causes high CPU usage... but it works OK, so my problem is solved
 

I confirm that this HDMI/RCA converter solved the problem and it's OK.
MPD parameters while playing radio stations:
cat /proc/asound/card2/pcm0p/sub0/hw_params access: RW_INTERLEAVED format: S24_LE subformat: STD channels: 2 rate: 192000 (192000/1) period_size: 8192 buffer_size: 65536
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