Microfono - Telecamera - webcam Marca Zoom (non è la ditta di webconference), modello Q2N

https://www.zoom-na.com/products/field-video-recording/video-recording/zoom-q2n-handy-video-recorder

Manuale PDF: https://zoom-na.com/sites/default/files/products/downloads/pdfs/Q2n_English.pdf#ZOOM_D303_EN-A6.indd%3A.88515

'''Collegato via USB al Pc, dopo tre secondi la Q2N si spegne (gracefully) con il messaggio: "Goodbye see you".'''

(risolta, vedi sotto)

 * OS usato Debian 10
 * Cambiato svariati cavi (sette diversi). 
 * Alimentata anche a pila. 
 * Sia mount USB card che audio mic, funzionano. (Su piattaforma proprietaria funziona anche come webcam).
 * Nei settings della webcam autopower off is: OFF

Aggiornamento firmware: (hai visto mai) da 1.10 a 1.11 --> aggiornamento firmware successo, ma non cambia le cose (si spegne dopo pochi secondi).


'''In quei tre secondi di funzionamento:'''


'''lsusb'''

{{{
Bus 002 Device 008: ID 1686:036c ZOOM Corporation
}}}


'''dmesg'''

{{{
usb 2-8: new high-speed USB device number 6 using xhci_hcd
usb 2-8: New USB device found, idVendor=1686, idProduct=036c, bcdDevice= 2.00
usb 2-8: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 2-8: Product: Q2n Web Cam
usb 2-8: Manufacturer: ZOOM
usb 2-8: SerialNumber: 0
media: Linux media interface: v0.10
videodev: Linux video capture interface: v2.00
uvcvideo: Found UVC 1.00 device Q2n Web Cam (1686:036c)
uvcvideo 2-8:1.0: Entity type for entity Camera 1 was not initialized!
usbcore: registered new interface driver uvcvideo
USB Video Class driver (1.1.1)
usb 2-8: USB disconnect, device number 6
}}}

'''ls -ltr /dev/video*'''

{{{
crw-rw----+ 1 root video 81, 0 Mar 21 23:12 /dev/video0
crw-rw----+ 1 root video 81, 1 Mar 21 23:12 /dev/video1
}}}

'''hwinfo --usb'''

{{{
05: USB 00.0: 0000 Unclassified device
  [Created at usb.122]
  Unique ID: 1Nxo.PszJ7gBE5vF
  Parent ID: pBe4.2DFUsyrieMD
  SysFS ID: /devices/pci0000:00/0000:00:14.0/usb2/2-8/2-8:1.0
  SysFS BusID: 2-8:1.0
  Hardware Class: unknown
  Model: "ZOOM Q2n Web Cam"
  Hotplug: USB
  Vendor: usb 0x1686 "ZOOM Corporation"
  Device: usb 0x036c "Q2n Web Cam"
  Revision: "2.00"
  Serial ID: "0"
  Driver: "uvcvideo"
  Driver Modules: "uvcvideo"
  Speed: 480 Mbps
  Module Alias: "usb:v1686p036Cd0200dcEFdsc02dp01ic0Eisc01ip00in00"
  Driver Info #0:
    Driver Status: uvcvideo is active
    Driver Activation Cmd: "modprobe uvcvideo"
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #14 (Hub)
}}}


'''v4l2-ctl --list-devices'''

{{{
Q2n Web Cam: Q2n Web Cam (usb-0000:00:14.0-8):
	/dev/video0
	/dev/video1
}}}

'''Aggiornamento: Corrispondenza email con la Zoom inc. - Aprile 2021'''

''Dear Zoom, my Zoom Q2N is unable to work in webcam mode with GNU/Linux OS.''

(Tra le righe: Mannaggia a voi e a chi non ve lo dice. Ridatemi i soldi, basterdi!)

Risposta stesso giorno:

''Hello, Zoom products are not compatible with Linux based operating systems.''

(Tra le righe: Ma chi sei, cosa vuoi, chi ti conosce. Vai via.)


'''Workaround: per tenere accesa la telecamera:'''

{{{
apt install v4l2ucp
v4l2ucp &
}}}

Fino a che la finestra di v4l2ucp resta aperta, la telecamera non si spegne. (Grazie, Lobo!)

p.s. Si può usare anche qv4l2.