Re: libv4l release: 0.5.97: the whitebalance release!

[Hans de Goede <hdegoede@redhat.com>]

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

Thanks & Regards,

Hans