Hans de Goede wrote:
> 
> 
> On 04/16/2009 10:46 PM, Adam Baker wrote:
>> On Thursday 16 Apr 2009, Hans de Goede wrote:
>>> On 04/16/2009 12:26 AM, Adam Baker wrote:
>>>> On Wednesday 15 Apr 2009, Hans de Goede wrote:
>>>>> Currently only whitebalancing is enabled and only on Pixarts (pac)
>>>>> webcams (which benefit tremendously from this). To test this with
>>>>> other
>>>>> webcams (after instaling this release) do:
>>>>>
>>>>> export LIBV4LCONTROL_CONTROLS=15
>>>>> LD_PRELOAD=/usr/lib/libv4l/v4l2convert.so v4l2ucp&
>>>> Strangely while those instructions give me a whitebalance control
>>>> for the
>>>> sq905 based camera I can't get it to appear for a pac207 based camera
>>>> regardless of whether LIBV4LCONTROL_CONTROLS is set.
>>> Thats weird, there is a small bug in the handling of pac207
>>> cams with usb id 093a:2476 causing libv4l to not automatically
>>> enable whitebalancing (and the control) for cams with that id,
>>> but if you have LIBV4LCONTROL_CONTROLS set (exported!) both
>>> when loading v4l2ucp (you must preload v4l2convert.so!) and
>>> when loading your viewer, then it should work.
>>>
>>
>> I've tested it by plugging in the sq905 camera, verifying the
>> whitebablance
>> control is present and working, unplugging the sq905 and plugging in the
>> pac207 and using up arrow to restart v4l2ucp and svv so I think I've
>> eliminated most finger trouble possibilities. The pac207 is id
>> 093a:2460 so
>> not the problem id. I'll have to investigate more thoroughly later.
>>
> 
> Does the pac207 perhaps have a / in its "card" string (see v4l-info
> output) ?
> if so try out this patch:
> http://linuxtv.org/hg/~hgoede/libv4l/rev/1e08d865690a
> 

I have the same issue as Adam when trying to test this with my
gspca_stv06xx based Quickcam Web camera i. e no whitebalancing
controls show up. I'm attaching a dump which logs all available
pixformats and v4l2ctrls showing that libv4l is properly loaded.
(And yes, LIBV4LCONTROL_CONTROLS is exported and set to 15).

Best regards,
Erik

> Thanks & Regards,
> 
> Hans
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