Hans de Goede wrote: > > > On 04/19/2009 09:20 PM, Erik Andrén wrote: >> 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. >> > > Did you also do the > export LIBV4LCONTROL_CONTROLS=15 > > In the terminal from where you are starting the viewing application ? > Yes. > 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
