2009/4/19 Hans de Goede <hdegoede@xxxxxxxxxx>: > > > On 04/18/2009 04:40 PM, Erik Andrén wrote: >> >> Hans de Goede wrote: >>> >>> On 04/17/2009 09:27 PM, Erik Andrén wrote: >>>> >>>> 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 >>>> >>> Ah, you are using v4l2-ctl, not v4l2ucp, and that uses >>> V4L2_CTRL_FLAG_NEXT_CTRL >>> control enumeration. My code doesn't handle V4L2_CTRL_FLAG_NEXT_CTRL >>> (which is >>> a bug). I'm not sure when I'll have time to fix this. Patches welcome, >>> or in >>> the mean time use v4l2ucp to play with the controls. >>> >> >> Actually, I've tried to use both without finding the controls. >> I've only tried with v4l2ucp v. 1.2. Is 1.3 necessary? >> > > Apparently there are different versions of v4l2ucp in different distro's > and some do use the V4L2_CTRL_FLAG_NEXT_CTRL, just like v4l2-ctl. See > Adam Baker's patch later in this thread. Which I will apply to my > tree after I've reviewed it (when I find some time currently I've a lot of > $work$ ) > Applying Adam Bakers patch makes the control appear _but_ I can't seem to make out any difference when any of the whitebalancing and normalize options, regardless of how i tweak the max / min values. Best regards, Erik > Regards, > > Hans > -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
