LibreELEC:~ # v4l2-ctl -d /dev/video10 -n
ioctl: VIDIOC_ENUMINPUT
LibreELEC:~ # v4l2-ctl -d /dev/video11 -n
ioctl: VIDIOC_ENUMINPUT
LibreELEC:~ # v4l2-ctl -d /dev/video12 -n
ioctl: VIDIOC_ENUMINPUT
LibreELEC:~ # v4l2-ctl -d /dev/video0 -n
ioctl: VIDIOC_ENUMINPUT
        Input       : 0
        Name        : Composite1
        Type        : 0x00000002 (Camera)
        Audioset    : 0x00000000
        Tuner       : 0x00000000
        Standard    : 0x0000000000FFFFFF (PAL-B/B1/G/H/I/D/D1/K/M/N/Nc/60 NTSC-M       /M-JP/443/M-KR SECAM-B/D/G/H/K/K1/L/Lc)
        Status      : 0x00000102 (no signal, no hsync lock)
        Capabilities: 0x00000004 (SDTV standards)

        Input       : 1
        Name        : S-Video
        Type        : 0x00000002 (Camera)
        Audioset    : 0x00000000
        Tuner       : 0x00000000
        Standard    : 0x0000000000FFFFFF (PAL-B/B1/G/H/I/D/D1/K/M/N/Nc/60 NTSC-M       /M-JP/443/M-KR SECAM-B/D/G/H/K/K1/L/Lc)
        Status      : 0x00000000 (ok)
        Capabilities: 0x00000004 (SDTV standards)
LibreELEC:~ #