Yes I know. But functions is executed and no effects on image. On this
case white balance is same style function and working well.
### v4l2 device info [/dev/video0] ###
general info
VIDIOC_QUERYCAP
driver : "sn9c20x"
card : "SN9C20x USB 2.0 Webcam Driver"
bus_info : "usb-0000:00:1d.7-4"
version : 32.9.1
capabilities : 0x5000001
[VIDEO_CAPTURE,READWRITE,STREAMING]
standards
inputs
VIDIOC_ENUMINPUT(0)
index : 0
name : "Webcam"
type : CAMERA
audioset : 0
tuner : 0
std : 0x0 []
status : 0x0 []
video capture
VIDIOC_ENUM_FMT(0,VIDEO_CAPTURE)
index : 0
type : VIDEO_CAPTURE
flags : 0
description : "SN9C20X I420 (YUV 4:2:0)"
pixelformat : 0x30323953 [S920]
VIDIOC_ENUM_FMT(1,VIDEO_CAPTURE)
index : 1
type : VIDEO_CAPTURE
flags : 0
description : "Bayer 8bit (BGGR)"
pixelformat : 0x31384142 [BA81]
VIDIOC_ENUM_FMT(2,VIDEO_CAPTURE)
index : 2
type : VIDEO_CAPTURE
flags : 0
description : "RGB3"
pixelformat : 0x33424752 [RGB3]
VIDIOC_ENUM_FMT(3,VIDEO_CAPTURE)
index : 3
type : VIDEO_CAPTURE
flags : 0
description : "BGR3"
pixelformat : 0x33524742 [BGR3]
VIDIOC_ENUM_FMT(4,VIDEO_CAPTURE)
index : 4
type : VIDEO_CAPTURE
flags : 0
description : "YU12"
pixelformat : 0x32315559 [YU12]
VIDIOC_G_FMT(VIDEO_CAPTURE)
type : VIDEO_CAPTURE
fmt.pix.width : 640
fmt.pix.height : 480
fmt.pix.pixelformat : 0x31384142 [BA81]
fmt.pix.field : ANY
fmt.pix.bytesperline : 640
fmt.pix.sizeimage : 307200
fmt.pix.colorspace : SRGB
fmt.pix.priv : 1
controls
VIDIOC_QUERYCTRL(BASE+0)
id : 9963776
type : INTEGER
name : "Brightness"
minimum : 0
maximum : 255
step : 1
default_value : 127
flags : 0
VIDIOC_QUERYCTRL(BASE+1)
id : 9963777
type : INTEGER
name : "Contrast"
minimum : 0
maximum : 255
step : 1
default_value : 127
flags : 0
VIDIOC_QUERYCTRL(BASE+2)
id : 9963778
type : INTEGER
name : "Saturation"
minimum : 0
maximum : 255
step : 1
default_value : 127
flags : 0
### video4linux device info [/dev/video0] ###
general info
VIDIOCGCAP
name : "SN9C20x USB 2.0 Webcam Driver"
type : 0x1 [CAPTURE]
channels : 1
audios : 0
maxwidth : 640
maxheight : 480
minwidth : 48
minheight : 32
channels
VIDIOCGCHAN(0)
channel : 0
name : "Webcam"
tuners : 0
flags : 0x0 []
type : CAMERA
norm : 0
tuner
ioctl VIDIOCGTUNER: Invalid argument
audio
ioctl VIDIOCGAUDIO: Invalid argument
picture
VIDIOCGPICT
brightness : 32639
hue : 0
colour : 32639
contrast : 32639
whiteness : 12850
depth : 8
palette : unknown
buffer
ioctl VIDIOCGFBUF: Invalid argument
window
VIDIOCGWIN
x : 0
y : 0
width : 640
height : 480
chromakey : 0
flags : 0
Brian Johnson wrote:
> Its strange that the contrast and brightness seem to have stopped
> working for the 6270 since those are controlled via the bridge which
> should work the same for all sensors. One thing you should check is
> run the command v4l-info and check which format it says your camera is
> using because brigghtness and contrast do not in fact work with the
> bayer format.
>
> On Sat, Mar 14, 2009 at 1:07 PM, Stefan Krastanov
> <[email protected]> wrote:
>
>> Hello,
>>
>> On 0C45:6270 with MT9V011 it's also not working(checked with v4l2ucp). I
>> have reported it, but failed to give details - I was more interested in
>> another problem.
>>
>> I have some time so I can check in exactly which version the support
>> regresses but I will need at least some initial time interval in which to
>> begin the search. And also, I'll be happy if you can tell me how to row back
>> to old versions using git (based on date if it's possible) - if not I'll dig
>> in the man page ;)
>>
>> Best Regards
>> Stefan Krastanov
>>
>> 2009/3/14 Boris Borisov <[email protected]>
>>
>>> Hello,
>>> Can you check the brightness and contrast functions, because for me this
>>> functions is broken.
>>> Really i call sn9c20x_set_contrast with different values of brightness
>>> and contrast via sys-fs and V4l functions (ekiga) but brightness and
>>> contrast is not changed.
>>> On very old version (who I use) this functions is working.
>>>
>>> Best regards
>>> Bobby
>>>
>>>
>>>
>>>
>>
>
> >
>
>
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