* [gentoo-user] guvcview - no video device (/dev/video0) found
@ 2023-05-13 20:50 thelma
2023-05-14 4:31 ` Andreas Fink
0 siblings, 1 reply; 3+ messages in thread
From: thelma @ 2023-05-13 20:50 UTC (permalink / raw
To: Gentoo mailing list
Getting an error message when trying to start usb-cam:
guvcview
ENCODER: no video codec detected for VP9 (VP9)
ENCODER: no video codec detected for Theora (ogg theora)
GUVCVIEW: version 2.0.8
GUVCVIEW: couldn't open /home/joseph/.config/guvcview2/video0 for read: No such file or directory
V4L2_CORE: ERROR opening V4L interface: No such file or directory
GUVCVIEW (2): Guvcview error
no video device (/dev/video0) found
GUVCVIEW (Qt5): fatal error (0 devices detected)
GUVCVIEW (Qt5): creating error dialog
dmesg:
[935066.984348] usb 1-1.4: Product: Vega USB2.0 Camera
[935066.984350] usb 1-1.4: Manufacturer: Vimicro Corp.
[936075.049430] usb 1-1.4: USB disconnect, device number 47
[936080.312412] usb 1-1.4: new high-speed USB device number 48 using xhci_hcd
[936080.504291] usb 1-1.4: New USB device found, idVendor=0ac8, idProduct=0331, bcdDevice= 1.00
[936080.504296] usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[936080.504297] usb 1-1.4: Product: Vega USB2.0 Camera
[936080.504299] usb 1-1.4: Manufacturer: Vimicro Corp.
--
Thelma
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [gentoo-user] guvcview - no video device (/dev/video0) found
2023-05-13 20:50 [gentoo-user] guvcview - no video device (/dev/video0) found thelma
@ 2023-05-14 4:31 ` Andreas Fink
2023-05-15 19:33 ` [gentoo-user] [SOLVED] " thelma
0 siblings, 1 reply; 3+ messages in thread
From: Andreas Fink @ 2023-05-14 4:31 UTC (permalink / raw
To: gentoo-user
On Sat, 13 May 2023 14:50:33 -0600
thelma@sys-concept.com wrote:
> Getting an error message when trying to start usb-cam:
>
> guvcview
> ENCODER: no video codec detected for VP9 (VP9)
> ENCODER: no video codec detected for Theora (ogg theora)
> GUVCVIEW: version 2.0.8
> GUVCVIEW: couldn't open /home/joseph/.config/guvcview2/video0 for read: No such file or directory
> V4L2_CORE: ERROR opening V4L interface: No such file or directory
> GUVCVIEW (2): Guvcview error
> no video device (/dev/video0) found
> GUVCVIEW (Qt5): fatal error (0 devices detected)
> GUVCVIEW (Qt5): creating error dialog
>
> dmesg:
>
> [935066.984348] usb 1-1.4: Product: Vega USB2.0 Camera
> [935066.984350] usb 1-1.4: Manufacturer: Vimicro Corp.
> [936075.049430] usb 1-1.4: USB disconnect, device number 47
> [936080.312412] usb 1-1.4: new high-speed USB device number 48 using xhci_hcd
> [936080.504291] usb 1-1.4: New USB device found, idVendor=0ac8, idProduct=0331, bcdDevice= 1.00
> [936080.504296] usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> [936080.504297] usb 1-1.4: Product: Vega USB2.0 Camera
> [936080.504299] usb 1-1.4: Manufacturer: Vimicro Corp.
>
Do you have read/write access to /dev/video0? Try with:
ls -lh /dev/video*
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [gentoo-user] [SOLVED] guvcview - no video device (/dev/video0) found
2023-05-14 4:31 ` Andreas Fink
@ 2023-05-15 19:33 ` thelma
0 siblings, 0 replies; 3+ messages in thread
From: thelma @ 2023-05-15 19:33 UTC (permalink / raw
To: gentoo-user
On 5/13/23 22:31, Andreas Fink wrote:
> On Sat, 13 May 2023 14:50:33 -0600
> thelma@sys-concept.com wrote:
>
>> Getting an error message when trying to start usb-cam:
>>
>> guvcview
>> ENCODER: no video codec detected for VP9 (VP9)
>> ENCODER: no video codec detected for Theora (ogg theora)
>> GUVCVIEW: version 2.0.8
>> GUVCVIEW: couldn't open /home/joseph/.config/guvcview2/video0 for read: No such file or directory
>> V4L2_CORE: ERROR opening V4L interface: No such file or directory
>> GUVCVIEW (2): Guvcview error
>> no video device (/dev/video0) found
>> GUVCVIEW (Qt5): fatal error (0 devices detected)
>> GUVCVIEW (Qt5): creating error dialog
>>
>> dmesg:
>>
>> [935066.984348] usb 1-1.4: Product: Vega USB2.0 Camera
>> [935066.984350] usb 1-1.4: Manufacturer: Vimicro Corp.
>> [936075.049430] usb 1-1.4: USB disconnect, device number 47
>> [936080.312412] usb 1-1.4: new high-speed USB device number 48 using xhci_hcd
>> [936080.504291] usb 1-1.4: New USB device found, idVendor=0ac8, idProduct=0331, bcdDevice= 1.00
>> [936080.504296] usb 1-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
>> [936080.504297] usb 1-1.4: Product: Vega USB2.0 Camera
>> [936080.504299] usb 1-1.4: Manufacturer: Vimicro Corp.
>>
>
> Do you have read/write access to /dev/video0? Try with:
> ls -lh /dev/video*
No, it wasn't the case.
I had to add support for V4L in the kernel.
I'm surprised that there was no emerge note after emerging the package, that package needs V4L support in the kernel.
^ permalink raw reply [flat|nested] 3+ messages in thread
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2023-05-13 20:50 [gentoo-user] guvcview - no video device (/dev/video0) found thelma
2023-05-14 4:31 ` Andreas Fink
2023-05-15 19:33 ` [gentoo-user] [SOLVED] " thelma
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