Hi, It seems both of these settings are not supported by the driver. ioctl VIDIOC_S_CTRL fails.
Any suggestion? Thanks On Sat, Aug 7, 2010 at 9:04 PM, linux newbie <linux.newbi...@gmail.com> wrote: > Hi, > > Thanks for your reply. Let me try it next week and get back to you. > > > > On Tue, Aug 3, 2010 at 11:58 PM, Laurent Pinchart > <laurent.pinch...@ideasonboard.com> wrote: >> Hi, >> >> On Thursday 29 July 2010 08:48:55 linux newbie wrote: >>> Hi, >>> >>> I have microsoft life cam connected to Ubuntu running linux 2.6.26. >>> >>> Based on the v4l2 documentation, I wrote a simple program, that >>> captures image(YUV4:2:2) and write it to jpeg. >>> >>> I captured two images and there is quiet significiant difference >>> between the two images. First one is bit greenish and brighter and >>> second one is darker. I havent set any control values, so I assume it >>> take default values for brightness/sharpness etc. >>> >>> I also tested the same camera in my embedded target. The results are >>> differetn. First picture is normal, second is very bright. >>> >>> Can anyone let me know, what might be the issue and possible solution to >>> fix it. >> >> That's probably caused by auto-exposure and auto-white balance. Both settings >> can be manually controlled by disabling the auto-exposure and auto-white >> balance controls. >> >> -- >> Regards, >> >> Laurent Pinchart >> > _______________________________________________ Linux-uvc-devel mailing list Linux-uvc-devel@lists.berlios.de https://lists.berlios.de/mailman/listinfo/linux-uvc-devel
