Re: Can't get Logitech webcam c910 to operate under stretch
[Please do not top post.]
On Fri, 3 Apr 2020 16:21:10 +0200
Bernard <bdebreil@free.fr> wrote:
> Thanks for this reply. I still haven't found a way to get that Logitech
> c910 webcam on my desktop running Debian Stretch. It operates only as a
> camera and does not record any sound.
>
> (This same Logitech c910 works on my laptop running Ubuntu 14.04. It
> works bad : the recorded sound is mixed with a loud background noise,
> possibly that of the laptop fan, but it does still work. The built in
> camera (Bison) also records loud background noise.
So if you can compare the output from the various diagnostic commands
between the two systems, that might help.
> Back to my desktop running Stretch, I ran the following tests :
>
> ls /dev/video*
> /dev/video0
>
> ls /dev/audio*
> ls: impossible d'accéder à '/dev/audio*': Aucun fichier ou dossier de ce
> type
>
> (Whether my webcam is plugged or not, ls /dev/audio* doesn't show
> anything. /dev/video0 only shows when the webcam is plugged to usb port)
On my laptop, with working internal webcam and internal Intel sound
hardware, I have no /dev/audio* either.
> Using VLC, I got info about audio peripherics :
> GK208 HDMI/DP Audio controller Digital Stereo (HDMI2)
>
> #dmesg : This is weird :
>
> [ 830.346032] uvcvideo: Found UVC 1.00 device <unnamed> (046d:0821)
> [ 830.359491] uvcvideo 1-10.3:1.2: Entity type for entity Extension 4
> was not initialized!
> etc.
>
> [........................................
> [273.480947] usb 1-10.3: reset high-speed USB device number 6 using xhci_hcd
> [ 825.951919] usb 1-10.3: USB disconnect, device number 6
> [ 829.503038] usb 1-10.3: new high-speed USB device number 7 using xhci_hcd
> [ 829.874824] usb 1-10.3: New USB device found, idVendor=046d,
> idProduct=0821
> [ 829.874830] usb 1-10.3: New USB device strings: Mfr=0, Product=0,
> SerialNumber=1
> [ 829.874834] usb 1-10.3: SerialNumber: 314061A0
> [ 830.346032] uvcvideo: Found UVC 1.00 device <unnamed> (046d:0821)
> [ 830.359491] uvcvideo 1-10.3:1.2: Entity type for entity Extension 4
> was not initialized!
> [ 830.359499] uvcvideo 1-10.3:1.2: Entity type for entity Processing 2
> was not initialized!
> [ 830.359504] uvcvideo 1-10.3:1.2: Entity type for entity Camera 1 was
> not initialized!
> [ 830.359508] uvcvideo 1-10.3:1.2: Entity type for entity Extension 5
> was not initialized!
> [ 830.359512] uvcvideo 1-10.3:1.2: Entity type for entity Extension 6
> was not initialized!
> [ 830.359515] uvcvideo 1-10.3:1.2: Entity type for entity Extension 7
> was not initialized!
> [ 830.359519] uvcvideo 1-10.3:1.2: Entity type for entity Extension 8
> was not initialized!
> [ 830.359821] input: UVC Camera (046d:0821) as
> /devices/pci0000:00/0000:00:14.0/usb1/1-10/1-10.3/1-10.3:1.2/input/input15
>
> root@Debian-Stretch:/home/bd#
>
> *****************
Sorry, I don't know how to interpret those messages.
> Tests using v4l2-ctl
>
> bd@Debian-Stretch:~$ v4l2-ctl --list-devices
>
> UVC Camera (046d:0821) (usb-0000:00:14.0-9):
> /dev/video0
>
> The 'list of configurable controls' only concerns video, nothing about
> audio !
I don't know this tool, sorry.
> $ arecord -l
> **** Liste des Périphériques Matériels CAPTURE ****
> carte 0: PCH [HDA Intel PCH], périphérique 0: ALC887-VD Analog
> [ALC887-VD Analog]
> Sous-périphériques: 1/1
> Sous-périphérique #0: subdevice #0
> carte 0: PCH [HDA Intel PCH], périphérique 2: ALC887-VD Alt Analog
> [ALC887-VD Alt Analog]
> Sous-périphériques: 1/1
> Sous-périphérique #0: subdevice #0
> carte 2: U0x46d0x821 [USB Device 0x46d:0x821], périphérique 0: USB Audio
> [USB Audio]
> Sous-périphériques: 1/1
> Sous-périphérique #0: subdevice #0
>
> Here we can see mention of the audio function
Please adjust your locale for postings to this list:
https://makandracards.com/makandra/28205-linux-running-a-program-with-a-different-locale-than-your-default
It looks like the alsa system does see the camera as an audio device,
so it should be just a matter of getting your applications to use it.
Can you get the other applications I mentioned (ffmpeg, mpv) to record
audio from the camera?
> Hoping for more help,
>
> Bernard
>
>
> On 02/04/2020 06:39, Celejar wrote:
> > On Wed, 1 Apr 2020 17:14:29 +0200
> > Bernard <bdebreil@free.fr> wrote:
> >
> >> testing with cheese, it doesn't record any sound. Thanks in advance for
> >
> > Try testing the camera with other software, e.g., ffmpeg, mpv, vlc:
> >
> > https://wiki.archlinux.org/index.php/Webcam_setup
> > https://help.ubuntu.com/community/Webcam
> >
> > Celejar
> >
>
Celejar
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