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Thread: webcam

  1. #41
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    Default Re: webcam

    Quote Originally Posted by deano_ferrari View Post
    The command is actually
    Code:
    usb-devices
    Thank you deano_ferrari. I ran the corrected command and got
    Code:
    T:  Bus=02 Lev=02 Prnt=02 Port=04 Cnt=02 Dev#=  4 Spd=12  MxCh= 0
    D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
    P:  Vendor=18ec ProdID=3299 Rev=01.00
    S:  Manufacturer=ARKMICRO
    S:  Product=USB2.0 PC CAMERA
    C:  #Ifs= 4 Cfg#= 1 Atr=80 MxPwr=320mA
    I:  If#=0x0 Alt= 0 #EPs= 1 Cls=0e(video) Sub=01 Prot=00 Driver=uvcvideo
    I:  If#=0x1 Alt= 0 #EPs= 0 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
    I:  If#=0x2 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=snd-usb-audio
    I:  If#=0x3 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
    
    Of course, there were many other sections. I thought this was the pertinent one.
    Any sufficiently advanced technology is indistinguishable from magic. - Arthur C. Clarke

  2. #42
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    Default Re: webcam

    @Prexy, sorry, my mistake. Almost 60 now, I shouldn't do things from memory

    So, driver is loaded for both audio and video. That's good.
    Is your user already a member of the 'video' group ? And ( should not be needed ) the 'audio' group?
    ° Appreciate my reply? Click the star and let me know why.

    ° Perfection is not gonna happen. No way.

    http://en.opensuse.org/User:Knurpht
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  3. #43
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    Default Re: webcam

    Quote Originally Posted by Knurpht View Post
    @Prexy, sorry, my mistake. Almost 60 now, I shouldn't do things from memory

    So, driver is loaded for both audio and video. That's good.
    Is your user already a member of the 'video' group ? And ( should not be needed ) the 'audio' group?
    HAH! You don't want to rely on memory? Look at my avatar. I'm about to be 72! That's why I try to be humble about asking questions. I'm afraid I might be asking something that's obvious to everyone but me.

    I checked. I'm a member of both video and audio.

    BTW, I like your new avatar.
    Any sufficiently advanced technology is indistinguishable from magic. - Arthur C. Clarke

  4. #44
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    Default Re: webcam

    The more I look at this, the more confused I get! I have a laptop that accesses the webcam by doing no more than selecting it in VLC player. I got the idea that I would dedicate that to Zoom meetings via my guest network. But I had trouble with the speakers. So, to keep Zoom off my main pc, I dug up an older Dell PC and connected the webcam. As with the laptop, it accessed immediately with no fiddling of any kind. All three machines are running Tumbleweed. The older one is a little behind in updates but the newer ones are updated to 5/8/2020.

    So, there must be a setting somewhere that is keeping my main pc from accessing the webcam. Instead, I get this error "VLC is unable to open the MRL 'v4l2:///dev/video0'. Check the log for details"

    Could it be permissions? Boinc runs on those two other machines automatically at startup. But on this machine, I have to run it from sudo. Also, there is no log to check,
    Any sufficiently advanced technology is indistinguishable from magic. - Arthur C. Clarke

  5. #45
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    Default Re: webcam

    Quote Originally Posted by Prexy View Post
    So, there must be a setting somewhere that is keeping my main pc from accessing the webcam. Instead, I get this error "VLC is unable to open the MRL 'v4l2:///dev/video0'. Check the log for details"

    Code:
    ls -l /dev/video*
    openSUSE Leap 15.2; KDE Plasma 5

  6. #46
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    Default Re: webcam

    Another thing to do....observe the kernel messaging in a terminal...
    Code:
    dmesg -w
    and then plug in the USB webcam device. Any errors or interesting output reported?
    openSUSE Leap 15.2; KDE Plasma 5

  7. #47
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    Default Re: webcam

    Should this be root?
    Code:
    ls -l /dev/video*
    crw-rw----+ 1 root video 81, 0 May  9 16:44 /dev/video0
    crw-rw----+ 1 root video 81, 1 May  9 16:44 /dev/video1
    crw-rw----+ 1 root video 81, 2 May  9 23:44 /dev/video2
    crw-rw----+ 1 root video 81, 3 May  9 23:44 /dev/video3
    
    
    Quote Originally Posted by deano_ferrari View Post
    Code:
    ls -l /dev/video*
    [/COLOR]
    Any sufficiently advanced technology is indistinguishable from magic. - Arthur C. Clarke

  8. #48
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    Default Re: webcam

    Quote Originally Posted by deano_ferrari View Post
    Another thing to do....observe the kernel messaging in a terminal...
    Code:
    dmesg -w
    and then plug in the USB webcam device. Any errors or interesting output reported?
    Code:
    [25220.945462] usb 2-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=0
    [25220.945464] usb 2-1.5: Product: USB2.0 PC CAMERA
    [25220.945465] usb 2-1.5: Manufacturer: ARKMICRO
    [25220.945919] uvcvideo: Found UVC 1.00 device USB2.0 PC CAMERA (18ec:3299)
    [25220.950457] uvcvideo: UVC non compliance - GET_DEF(PROBE) not supported. Enabling 
    workaround.
    [25220.950959] uvcvideo 2-1.5:1.0: Entity type for entity Processing 2 was not initia
    lized!
    [25220.950962] uvcvideo 2-1.5:1.0: Entity type for entity Camera 1 was not initialize
    d!
    [25220.951051] input: USB2.0 PC CAMERA as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2
    -1.5/2-1.5:1.0/input/input15
    [25221.071696] usb 2-1.5: current rate 6639954 is different from the runtime rate 480
    00
    
    
    I did not compare this to the other two computers where this is working because I'm up against the forum switchover time!
    Any sufficiently advanced technology is indistinguishable from magic. - Arthur C. Clarke

  9. #49
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    Default Re: webcam

    The webcam fails on my desktop with this error:
    Code:
    VLC is unable to open the MRL 'v4l2://'. Check the log for details.
    On the laptop, the webcam works in every app. When I open the webcam in VLC on the laptop, it momentarily shows "v4l2://" on the image then disappears.
    I have two very different responses to dmesg. Here is the dmesg from the working laptop
    Code:
    [  298.043281] usb 3-2: new full-speed USB device number 3 using xhci_hcd[  298.191794] usb 3-2: not running at top speed; connect to a high speed hub
    [  298.194590] usb 3-2: New USB device found, idVendor=18ec, idProduct=3299, bcdDevice= 1.00
    [  298.194595] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
    [  298.194597] usb 3-2: Product: USB2.0 PC CAMERA
    [  298.194599] usb 3-2: Manufacturer: ARKMICRO
    [  298.195387] uvcvideo: Found UVC 1.00 device USB2.0 PC CAMERA (18ec:3299)
    [  298.198446] uvcvideo: UVC non compliance - GET_DEF(PROBE) not supported. Enabling workaround.
    [  298.198867] uvcvideo 3-2:1.0: Entity type for entity Processing 2 was not initialized!
    [  298.198870] uvcvideo 3-2:1.0: Entity type for entity Camera 1 was not initialized!
    [  298.198991] input: USB2.0 PC CAMERA as /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0/input/input20
    This is the dmesg from the failed desktop:
    Code:
    [170873.752830] usb 2-1.2: New USB device found, idVendor=18ec, idProduct=3299, bcdDe
    vice= 1.00
    [170873.752831] usb 2-1.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
    [170873.752832] usb 2-1.2: Product: USB2.0 PC CAMERA
    [170873.752833] usb 2-1.2: Manufacturer: ARKMICRO
    [170874.374136] usb 2-1.2: current rate 0 is different from the runtime rate 48000
    [170874.378150] usbcore: registered new interface driver snd-usb-audio
    [170874.379535] uvcvideo: Found UVC 1.00 device USB2.0 PC CAMERA (18ec:3299)
    [170874.383080] uvcvideo: UVC non compliance - GET_DEF(PROBE) not supported. Enabling
     workaround.
    [170874.383618] uvcvideo 2-1.2:1.0: Entity type for entity Processing 2 was not initi
    alized!
    [170874.383619] uvcvideo 2-1.2:1.0: Entity type for entity Camera 1 was not initializ
    ed!
    [170874.383751] input: USB2.0 PC CAMERA as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/
    2-1.2/2-1.2:1.0/input/input12
    [170874.383871] usbcore: registered new interface driver uvcvideo
    [170874.383872] USB Video Class driver (1.1.1)
    [170875.002797] usb 2-1.2: current rate 0 is different from the runtime rate 48000
    [170875.084752] usb 2-1.2: current rate 0 is different from the runtime rate 48000
    [170875.161322] usb 2-1.2: current rate 0 is different from the runtime rate 48000
    
    Both computers are up to date Tumbleweed. If I boot the desktop into Windows 10, the webcam works.
    Any sufficiently advanced technology is indistinguishable from magic. - Arthur C. Clarke

  10. #50
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    Default Re: webcam

    Resurrecting this thread to report that I never got the webcam working on the desktop in Tumbleweed and it is starting to fail on the laptop. I noticed, in a Zoom meeting, that my shirt was purple. The real color was dark green.

    Firing up either computer to Windows 10, the webcam works and the color is accurate. I was going to upgrade to a new webcam on Black Friday, but if the hardware in the old webcam is working, what is the chance that the hardware of a new webcam working properly?

    BTW, I was in a big-box computer store and asked to see webcams. The clerk just laughed at me!
    Any sufficiently advanced technology is indistinguishable from magic. - Arthur C. Clarke

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