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Hi,

it works like this:
- - after you connected some usb device to the host
- - it will be checked by usb-core driver
- - every device has some class description.
- - if your device say, it belong to: 14 - video class, uvcvideo will
initiate it.
- - if the device is not video class device, then there is no way to
uvcvideo will know about it. (except you will force it, but there is
no guaranty)

On 28.11.2011 14:43, Antonio Roberts wrote:
> Thanks for that FAQ. I executed "lsusb -d 046d:08cb -v | grep "14 
> Video"" and I get no output
> 
> * However * , could this be because it is only reading the
> wireless dongle? There's no way for me to physically connect the
> wireless webcam to my computer
> 
> On 24 November 2011 14:19, Alexey Fisher
> <bug-tr...@fisher-privat.net> wrote:
>> Hi,
>> 
>> Please read this FAQ: http://www.ideasonboard.org/uvc/faq/
>> 
>> On 24.11.2011 10:49, Antonio Roberts wrote:
>>> I've tried camorama, cheese, guvcview and loading cameras
>>> through websites like tumblr and facebook. They recognise that
>>> a new device is there but I get no video output
>>> 
>>> I've just tried luvcview with "luvcview -d /dev/video2" and got
>>> this error:
>>> 
>>> SDL information: Video driver: x11 A window manager is
>>> available Device information: Device path:  /dev/video2 Stream
>>> settings: Frame format: MJPG Unable to set format: Input/output
>>> error Init v4L2 failed !! exit fatal
>>> 
>>> 
>>> On 24 November 2011 09:28, Paulo Assis <pj.as...@gmail.com>
>>> wrote:
>>>> Hi, Have you tried any other software besides cheese?
>>>> (guvcview, luvcview,...)
>>>> 
>>>> Regards, Paulo
>>>> 
>>>> 2011/11/23 Antonio Roberts <anto...@hellocatfood.com>:
>>>>> I recently bought this wireless webcam; 
>>>>> http://www.maplin.co.uk/2.4ghz-wireless-webcam-388087 . I'm
>>>>> having trouble getting it to work on Ubuntu 11.04.
>>>>> 
>>>>> I ran lsusb and got the folowing information about the
>>>>> device:
>>>>> 
>>>>> Bus 006 Device 003: ID 0416:a91a Winbond Electronics Corp.
>>>>> 
>>>>> I did a Google serach for the device ID and the Linux UVC
>>>>> website (http://www.ideasonboard.org/uvc/ ) informs me that
>>>>> it matches the LogiLink Wireless Webcam (so Maplin probably
>>>>> just rebranded this!). What this website states is that
>>>>> this device should work, which it doesn't.
>>>>> 
>>>>> The problem I'm facing is that I don't get any actual video
>>>>> being streamed or shown. The built in microphone works and,
>>>>> when running Cheese, when I press the camera button on the
>>>>> webcam itself the software recognises that the button is
>>>>> pressed.
>>>>> 
>>>>> On that note, when running cheese from the terminal with
>>>>> this webcam attached I get the following error:
>>>>> 
>>>>> libv4l2: error getting pixformat: Invalid argument libv4l2:
>>>>> error setting pixformat: Input/output error
>>>>> 
>>>>> Any help is appreciated
>> 
>> _______________________________________________ Linux-uvc-devel
>> mailing list Linux-uvc-devel@lists.berlios.de 
>> https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
>> 
> 
> 
> 


- -- 
Regards,
Alexey
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