USB camera support via Libreelec 9.2.0 on an RPi4

I'm running LibreElec 9.2.0 on an RPi4. I attached a Mobius action cam in Webcam mode which works pretty well on a Win 10 box via VLC.

v4l2-ctl --list-device

provides this result:

Mobius (usb-0000:01:00.0-1.1):
/dev/video0
/dev/video1

lsusb

tells me this:

Bus 001 Device 010: ID 0603:1002 Novatek Microelectronics Corp.

After typing

 dmesg

I do get this among other things:

[ 5040.070865] usb 1-1.1: new high-speed USB device number 10 using xhci_hcd
[ 5040.161264] usb 1-1.1: config 1 interface 0 altsetting 0 bulk endpoint 0x2 has invalid maxpacket 64
[ 5040.161552] usb 1-1.1: New USB device found, idVendor=0603, idProduct=1002, bcdDevice= 0.10
[ 5040.161571] usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 5040.161588] usb 1-1.1: Product: Mobius
[ 5040.161603] usb 1-1.1: Manufacturer: C-DUTEK
[ 5040.165657] uvcvideo: Found UVC 1.00 device Mobius (0603:1002)
[ 5040.167773] uvcvideo 1-1.1:1.0: Entity type for entity Processing 4 was not initialized!
[ 5040.167797] uvcvideo 1-1.1:1.0: Entity type for entity Selector 3 was not initialized!
[ 5040.167817] uvcvideo 1-1.1:1.0: Entity type for entity Camera 1 was not initialized!
[ 5040.167843] uvcvideo: Failed to create links for entity 4
[ 5040.167857] uvcvideo: Failed to register entites (-22).

v4l2-ctl produes a meaningful output:

v4l2-ctl --list-devices
Mobius (usb-0000:01:00.0-1.1):
/dev/video0
/dev/video1

At least to me it seems that something is still not installed properly. Could someone help in this case what could be the next step to get such a device running? This is just a quick test for me, next to this I'd like to use another USB camera device.

Any hints would be highly welcome.

Thanks for your valuable hint, but I already have a similar working setup with a second Pi running plain Raspbian and streaming the USB input as is (copy) via cvlc with no further issues except for some inconvenient but constant lag. I have so far not been able to get the same up and running with ffmpeg although I tried really hard.

The working config is actually an RPi3 but on an RPi4, which I still have to test under plain Raspbian, I hope there will be a quality improvement in speed (USB 3.0) and display quality (higher FPS).

How would I plug Raspbian USB camera drivers (which ones?) into LE without building it from source? I would really be glad if you could provide a hint.

OK, either on my RPi3 running Raspbian with the USB webcam attached or on the RPi4 running LE 9.2.0 lsmod tells me that uvcvideo, videobuf2_v4l2, videobuf2_vmalloc, videodev are present, but only on the Raspbian I do see videobuf2_core, media in addition. I'm absolutely not familiar enough with this stuff to know which one of those is needed and which would be not.

On both machines the camera is present as /dev/video0. On the RPi3, either with vlc or v4l2 test utility I could view the stream coming from that camera.

E.g. insmod uvcvideo does not work on both machines.

Could one perhaps run a docker container under LE 9.2.0 containing anything needed for streaming the camera video? Unfortunately I'm not experienced enough with docker to know instantaneously what needs to be done.

I have set up an fresh RPi4 box running Raspbian Buster, installed Kodi as well as TVHeadend and now am experimenting with ffmpeg / vlc on that machine to stream as needed. Basic streams with that USB device do work (which I knew already before) but unfortunately so far not the one I need.

Finally I got it working. My setup is like this: RPi4 with plain Raspbian Buster, USB cam attached in webcam mode, TVHeadend, Kodi with TVHeadend client addon. Via the TVHeadend GUI I defined a Mux as a ffmpeg pipe, for which options really need to be set carefully, for such an ffmpeg pipe it should also be possible to stream via command line for which the final pipe:1 should be exchanged with udp://localhost:port?pkt_size=1316. Without this the pipe doesn't work either.

My personal next step is to check whether a higher quality USB device attached to a USB 3.0 port of the RPi4 would lead to a similar result but with higher video quality than this simple webcam device.