Josef, white balance temperature and hue controls are being blacklisted in uvcvideo for all cameras due to a bug in the driver. A patch fixing the issue was committed recently (https://lists.berlios.de/pipermail/linux-uvc-devel/2009-December/005396.html) but I'm not sure when it will be available. These controls if supported by your camera could help improve the image color. Best regards, Paulo 2009/12/10 Jozef Riha <jose1711@xxxxxxxxx>: > thank you again, paulo, for your off-list help. cam is now working > nicely with xawtv, guvcview and skype. the colors slightly improved > during day-light, when artificial light is used they still look bad > though. i fiddled around with just about all v4l controls but couldn't > really fix it. i'll run a comparison with windows driver when i have a > chance. > > for others interested: the fix was indeed the quirks mode. i had to > set it like this: > > $ cat /etc/modprobe.d/uvcvideo.conf > options uvcvideo trace=15 quirks=2 > > regards all, > > joe > > On Wed, Dec 9, 2009 at 11:53 PM, Paulo Assis <pj.assis@xxxxxxxxx> wrote: >> You must reload the driver, >> >> rmmod uvcvideo >> modprobe uvcvideo >> >> otherwise the quirks want have any effect. >> >> uvcvideo is now mantained in the mercurial repo at linuxtv, >> installing v4l-dvb will also install uvcvideo, but if you want, just >> follow the instructions on the wiki to compile, but use: >> hg clone http://linuxtv.org/hg/~pinchartl/uvcvideo/ >> so that you get the very latest (testing) uvc code. >> In any case the quirks should be enough: >> http://lists.berlios.de/pipermail/linux-uvc-devel/2009-October/005235.html >> >> Best regards, >> Paulo >> >> 2009/12/9 Jozef Riha <jose1711@xxxxxxxxx>: >>> setting quirks to 2 unfortunately did not help. gucview's 1.2.1 output below >>> >>> [jose@darkstar ~]$ LC_ALL=C guvcview --verbose >>> guvcview 1.2.1 >>> unexpected integer value (1) for snd_numsec >>> Strings must be quoted >>> video_device: /dev/video0 >>> vid_sleep: 0 >>> cap_meth: 1 >>> resolution: 640 x 480 >>> windowsize: 480 x 700 >>> vert pane: 0 >>> spin behavior: 0 >>> mode: mjpg >>> fps: 1/25 >>> Display Fps: 0 >>> bpp: 0 >>> hwaccel: 1 >>> avi_format: 0 >>> sound: 1 >>> sound Device: 0 >>> sound samp rate: 0 >>> sound Channels: 0 >>> Sound delay: 0 nanosec >>> Sound Format: 80 >>> Sound bit Rate: 160 Kbps >>> Pan Step: 2 degrees >>> Tilt Step: 2 degrees >>> Video Filter Flags: 0 >>> image inc: 0 >>> profile(default):/home/jose/default.gpfl >>> starting portaudio... >>> language catalog=> dir:/usr/share/locale type:C lang:C cat:guvcview.mo >>> mjpg: setting format to 1196444237 >>> capture method = 1 >>> video device: /dev/video0 >>> /dev/video0 - device 1 >>> Init. UVC Camera (1b3b:2951) (location: usb-0000:00:1d.1-1) >>> { pixelformat = 'MJPG', description = 'MJPEG' } >>> { discrete: width = 640, height = 480 } >>> Time interval between frame: 1/30, >>> { discrete: width = 320, height = 240 } >>> Time interval between frame: 1/30, >>> { discrete: width = 160, height = 120 } >>> Time interval between frame: 1/30, >>> vid:1b3b >>> pid:2951 >>> driver:uvcvideo >>> checking format: 1196444237 >>> VIDIOC_S_FORMAT - Unable to set format: Input/output error >>> Init v4L2 failed !! >>> Init video returned -2 >>> trying minimum setup ... >>> capture method = 1 >>> video device: /dev/video0 >>> /dev/video0 - device 1 >>> Init. UVC Camera (1b3b:2951) (location: usb-0000:00:1d.1-1) >>> { pixelformat = 'MJPG', description = 'MJPEG' } >>> { discrete: width = 640, height = 480 } >>> Time interval between frame: 1/30, >>> { discrete: width = 320, height = 240 } >>> Time interval between frame: 1/30, >>> { discrete: width = 160, height = 120 } >>> Time interval between frame: 1/30, >>> vid:1b3b >>> pid:2951 >>> driver:uvcvideo >>> checking format: 1196444237 >>> VIDIOC_S_FORMAT - Unable to set format: Input/output error >>> Init v4L2 failed !! >>> ERROR: Minimum Setup Failed. >>> Exiting... >>> free audio mutex >>> VIDIOC_REQBUFS - Failed to delete buffers: Invalid argument (errno 22) >>> closed v4l2 strutures >>> free controls - vidState >>> cleaned allocations - 100% >>> Closing portaudio ...OK >>> Terminated. >>> >>> are you sure with the web-page? i cannot see a relationship between >>> dvb and uvcvideo. shouldn't i download the most recent driver from >>> http://linux-uvc.berlios.de/#download ? >>> >>> thank you, >>> >>> joe >>> >>> On Wed, Dec 9, 2009 at 11:20 PM, Paulo Assis <pj.assis@xxxxxxxxx> wrote: >>>> Hi, could you try the following: >>>> >>>> echo 2 > /sys/module/uvcvideo/parameters/quirks >>>> >>>> this will set uvcvideo quirks to 2 >>>> >>>> or you can also try the latest uvcvideo: >>>> http://www.linuxtv.org/wiki/index.php/How_to_Obtain,_Build_and_Install_V4L-DVB_Device_Drivers >>>> >>>> please if you can, use the latest version for guvcview (1.2.1) :D >>>> >>>> Regards, >>>> Paulo >>>> >>>> 2009/12/9 Jozef Riha <jose1711@xxxxxxxxx>: >>>>> [jose@darkstar ~]$ LC_ALL=C guvcview --verbose >>>>> guvcview 1.1.4 >>>>> video_device: /dev/video0 >>>>> vid_sleep: 0 >>>>> cap_meth: 1 >>>>> resolution: 640 x 480 >>>>> windowsize: 480 x 700 >>>>> vert pane: 0 >>>>> spin behavior: 0 >>>>> mode: mjpg >>>>> fps: 1/25 >>>>> Display Fps: 0 >>>>> bpp: 0 >>>>> hwaccel: 1 >>>>> avi_format: 0 >>>>> sound: 1 >>>>> sound Device: 0 >>>>> sound samp rate: 0 >>>>> sound Channels: 0 >>>>> Sound Block Size: 1 seconds >>>>> Sound Format: 80 >>>>> Sound bit Rate: 160 Kbps >>>>> Pan Step: 2 degrees >>>>> Tilt Step: 2 degrees >>>>> Video Filter Flags: 0 >>>>> image inc: 0 >>>>> profile(default):/home/jose/default.gpfl >>>>> starting portaudio... >>>>> language catalog=> dir:/usr/share/locale type:C lang:C cat:guvcview.mo >>>>> >>>>> (guvcview:31380): GLib-GObject-WARNING **: IA__g_object_set_valist: >>>>> object class `GtkSettings' has no property named `gtk-button-images' >>>>> mjpg: setting format to 1196444237 >>>>> capture method = 1 >>>>> video device: /dev/video0 >>>>> /dev/video0 - device 1 >>>>> Init. UVC Camera (1b3b:2951) (location: usb-0000:00:1d.1-1) >>>>> { pixelformat = 'MJPG', description = 'MJPEG' } >>>>> { discrete: width = 640, height = 480 } >>>>> Time interval between frame: 1/30, >>>>> { discrete: width = 320, height = 240 } >>>>> Time interval between frame: 1/30, >>>>> { discrete: width = 160, height = 120 } >>>>> Time interval between frame: 1/30, >>>>> checking format: 1196444237 >>>>> VIDIOC_S_FORMAT - Unable to set format: Input/output error >>>>> Init v4L2 failed !! >>>>> Init video returned -2 >>>>> trying minimum setup ... >>>>> capture method = 1 >>>>> video device: /dev/video0 >>>>> /dev/video0 - device 1 >>>>> Init. UVC Camera (1b3b:2951) (location: usb-0000:00:1d.1-1) >>>>> { pixelformat = 'MJPG', description = 'MJPEG' } >>>>> { discrete: width = 640, height = 480 } >>>>> Time interval between frame: 1/30, >>>>> { discrete: width = 320, height = 240 } >>>>> Time interval between frame: 1/30, >>>>> { discrete: width = 160, height = 120 } >>>>> Time interval between frame: 1/30, >>>>> checking format: 1196444237 >>>>> VIDIOC_S_FORMAT - Unable to set format: Input/output error >>>>> Init v4L2 failed !! >>>>> ERROR: Minimum Setup Failed. >>>>> Exiting... >>>>> Terminated. >>>>> >>>>> >>>>> On Wed, Dec 9, 2009 at 10:53 PM, Paulo Assis <pj.assis@xxxxxxxxx> wrote: >>>>>> Hi, >>>>>> Could you please try guvcview ( http://guvcview.berlios.de ) >>>>>> >>>>>> Please post me the output of guvcview --verbose >>>>>> >>>>>> Best regards, >>>>>> Paulo >>>>>> >>>>>> 2009/12/9 Jozef Riha <jose1711@xxxxxxxxx>: >>>>>>> Jozef Riha <jose1711 <at> gmail.com> writes: >>>>>>> >>>>>>>> >>>>>>>> Hello dear ML members, >>>>>>>> >>>>>>>> I wonder whether you can help me with the following issue. My webcam >>>>>>>> MSI StarCam (http://www.aaronpc.cz/produkty/msi-starcam-370i) >>>>>>>> identified as >>>>>>>> >>>>>>>> ... >>>>>>> >>>>>>> >>>>>>> Sorry I forgot to add kernel version. It is 2.6.32, config at >>>>>>> http://repos.archlinux.org/wsvn/packages/kernel26/repos/core-i686/config >>>>>>> >>>>>>> -- >>>>>>> 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 >>>>>>> > -- 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
