@Substring It's wired. Phone works fine.. didn't think about that lol. So it must be the Pi...

@Substring

/recalbox/scripts/moonlight/Moonlight.sh list
Moonlight Embedded 2.2.2 (EMBEDDED;CEC;PI)
Too many options: No such file or directory
Moonlight Embedded 2.2.2 (EMBEDDED;CEC;PI)
Searching for server...
Connect to 192.168.178.21...
NVIDIA GeForce GTX 770, GFE 3.1.2.31 (protocol version 7)

1. Dolphin
2. Cemu
3. Orcs Must Die! 2
4. DOTA 2
5. Saints Row IV (DX 11)
6. Tom Clancy's Rainbow Six Siege
7. Counter Strike: Global Offensive
8. PAYDAY 2
9. Diablo III
10. The Elder Scrolls V: Skyrim
11. Grand Theft Auto V
12. Steam
13. 战舰世界
14. Watch_Dogs 2
15. Paragon
16. Team Fortress 2
17. Minecraft
18. Call of Duty: Advanced Warfare Multiplayer
19. Overwatch
20. Heroes of the Storm
21. Warframe
22. Diablo III
23. Arma 3
24. Ghost Recon Wildlands
25. Overwatch
26. Call of Duty: Advanced Warfare

/usr/bin/moonlight stream -config /recalbox/share/system/configs/moonlight/moonlight.conf -mapping /recalbox/share/system/configs/moonlight/mappingP3.conf -input /dev/input/event2 -mapping /recalbox/share/system/configs/moonlight/mappingP2.conf -input /dev/input/event1 -mapping /recalbox/share/system/configs/moonlight/mappingP1.conf -input /dev/input/event0 -app 'Call of Duty: Advanced Warfare Multiplayer'
Moonlight Embedded 2.2.2 (EMBEDDED;CEC;PI)
Searching for server...
Connect to 192.168.178.21...
NVIDIA GeForce GTX 770, GFE 3.1.2.31 (protocol version 7)
Add input /dev/input/event2 (mapping /recalbox/share/system/configs/moonlight/mappingP3.conf)...
Add input /dev/input/event1 (mapping /recalbox/share/system/configs/moonlight/mappingP2.conf)...
Add input /dev/input/event0 (mapping /recalbox/share/system/configs/moonlight/mappingP1.conf)...
libcec.so.3: cannot open shared object file: No such file or directory
libcec.so.3: cannot open shared object file: No such file or directory
Failed to initialize libcec interface
Stream 1920 x 1080, 60 fps, 50000 kbps
Initializing platform...done
Resolving host name...done
Starting RTSP handshake...done
Initializing control stream...done
Initializing video stream...done
Initializing audio stream...done
Initializing input stream...done
Starting control stream...done
Starting video stream...done
Starting audio stream...done
Starting input stream...done
Returning RTP packet after queue overgrowth
Network dropped middle of a frame
Returning RTP packet after queue overgrowth
Returning RTP packet after queue overgrowth
Returning RTP packet after queue overgrowth
Returning RTP packet after queue overgrowth
Returning RTP packet queued for too long

Just a black screen with recalbox footer.

@Substring Thx! http://www75.zippyshare.com/v/OfFpGfAB/file.html

@Substring Some more research:

[ 188.20] : HOME=/recalbox/share/system LC_ALL="de_DE.UTF-8" SDL_VIDEO_GL_DRIVER=/usr/lib/libGLESv2.so SDL_NOMOUSE=1 /usr/bin/emulationstation; [ -f /tmp/shutdown.please ] && (shutdown -h now);[ -f /tmp/reboot.please ] && (shutdown -r now)
['/usr/bin/moonlight', 'stream', '-config', '/recalbox/share/system/configs/moonlight/moonlight.conf', '-mapping', '/recalbox/share/system/configs/moonlight/mappingP3.conf', '-input', '/dev/input/event2', '-mapping', '/recalbox/share/system/configs/moonlight/mappingP2.conf', '-input', '/dev/input/event1', '-mapping', '/recalbox/share/system/configs/moonlight/mappingP1.conf', '-input', '/dev/input/event0', '-app', 'Dolphin']
---- recalbox-config.sh ----

@Substring Hey, not quite sure what you mean. Mind explaining?

What I did now was editing the Moonlight conf, set a bitrate of 50000 and set the platform to "pi", sops to false.
I installed the newest drivers from a few days ago and installed GFE 3.1.2.31, cleaned everything and paired with still the same result.

The only error output when launching is:
Failed to initialize libcec interface

The rest is just a mass spam of:
Returning RTP packet queued for too long
Network dropped middle of a frame
Returning RTP packet queued for too long
Returning RTP packet queued for too long
Returning RTP packet queued for too long
Returning RTP packet after queue overgrowth
Returning RTP packet after queue overgrowth
Network dropped end of a frame
Returning RTP packet after queue overgrowth
Network dropped end of a frame
Returning RTP packet queued for too long
Network dropped middle of a frame
Returning RTP packet queued for too long
Network dropped middle of a frame
Returning RTP packet queued for too long
Returning RTP packet queued for too long
Returning RTP packet queued for too long
Returning RTP packet after queue overgrowth
Returning RTP packet queued for too long
Network dropped middle of a frame
Returning RTP packet queued for too long
Returning RTP packet after queue overgrowth
Returning RTP packet queued for too long
Network dropped middle of a frame
Returning RTP packet queued for too long
Returning RTP packet queued for too long
Returning RTP packet queued for too long
Waiting for IDR frame
IDR frame request sent
Returning RTP packet queued for too long
Network dropped middle of a frame
Returning RTP packet queued for too long
Returning RTP packet queued for too long
Returning RTP packet queued for too long
Returning RTP packet queued for too long
Waiting for IDR frame
Waiting for IDR frame
IDR frame request sent
Returning RTP packet queued for too long
Network dropped middle of a frame
Returning RTP packet queued for too long

It's still just the recalbox footer in a black screen with sound.

@Substring Mh, I will try some things then. What do you mean with "Woumd need to manually launch moonlight"?

@Substring Isn't a full blackscreen anymore, it has the recalbox footer and stays black. But yes, config should be standard:

##Hostname or IP-address of host to connect to
##By default host is autodiscovered using mDNS
#address =

##Video streaming configuration
width = 1920
height = 1080
fps = 60

##Bitrate depends by default on resolution and fps
##Set to -1 to enable default
##20Mbps (20000) for 1080p (60 fps)
##10Mbps (10000) for 1080p or 60 fps
##5Mbps (5000) for lower resolution or fps
bitrate = -1

##Size of network packets should be lower than MTU
#packetsize = 1024

##Default started application on host
#app = Steam

##Default used mapping for streaming
##Searched for in $XDG_DATA_DIRS/moonlight or /usr/share/moonlight and /usr/local/share/moonlight
##Mapping can also be user overrided in $XDG_CONFIG_DIR/moonlight or ~/.config/moonlight or current directory
#mapping = mappings/default.conf

##Enable selected input devices
##By default all available input devices should be used
##Only evdev devices /dev/input/event* are allowed
##To use a different mapping then default another mapping should be declared above the input
#input = /dev/input/event1

##Let GFE change graphical game settings for optimal performance and quality
sops = true

##Play audio on host instead of streaming to client
#localaudio = false

##Select audio device to play sound on
#audio = sysdefault

##Select the audio and video decoder to use
##default - autodetect
##omx - hardware video decoder for Raspberry Pi
##imx - hardware video decoder for i.MX6 devices
##sdl - software decoder
##fake - save to file (only available in debug builds)
platform = default

##Directory to store encryption keys
##By default keys are stored in $XDG_CACHE_DIR/moonlight or ~/.cache/moonlight
keydir = /recalbox/share/system/configs/moonlight/keydir

##Load additional configuration files
#config = /path/to/config

@Substring That's exactly what I did and what I said after I had the error with the file. I fully forgot all devices in GFE, cleaned Moonlight and paired them again. You want me to do it again?

So did it again with reboot and now it's only showing version 4.0.2 and "recalbox" with logo at the bottom.
/etc/init.d/S31emulationstation stop
cd /recalbox/scripts/moonlight
./Moonlight.sh clean
You can now pair again your recalbox with a PC
./Moonlight.sh clean
You can now pair again your recalbox with a PC
./Moonlight.sh pair
Moonlight Embedded 2.2.2 (EMBEDDED;CEC;PI)
Too many options: No such file or directory
Moonlight Embedded 2.2.2 (EMBEDDED;CEC;PI)
Searching for server...
Connect to 192.168.178.21...
Generating certificate...done
NVIDIA GeForce GTX 770, GFE 3.1.0.44 (protocol version 7)
Please enter the following PIN on the target PC: 2150
1017 / 1017
Succesfully paired
./Moonlight.sh init
Fetching games from ...
Scraping games ...
shutdown -r now

Broadcast message from root@RECALBOX (pts/1) (Mon Jun 12 13:43:10 2017):

The system is going down for reboot NOW!

@Substring Well as you see in the message I tried to create the file which didn't work and it was fixed after I cleaned GFE and re-paired again with cleaning, now it's blackscreen again.

Only blackscreen now.