Logitech C200 auto exposure control

Question

Auto exposure doesn't work well. It seems like exposure is calibrated for light inside room, where it works good. But if i direct camera outside (through a window), image is overexposed. Almost 80 % of pixels are just white. This problem exists only on Linux, on Windows it works normally.

With uvcdynctrl command i can only set "Exposure, Auto" to Manual Mode [1] and Aperture Priority Mode [3]. If I understand correctly that is camera's own auto exposure control. Can I somehow set motion to override this, so that it can calculate average brightnes of the image and then sets absolute exposure accordingly ?

uvcdynctrl -c -v output:

 Exposure, Auto Priority
    ID      : 0x00000010,
    Type    : Boolean,
    Flags   : { CAN_READ, CAN_WRITE },
    Values  : [ 0 .. 1, step size: 1 ],
    Default : 0
  Exposure (Absolute)
    ID      : 0x00000011,
    Type    : Dword,
    Flags   : { CAN_READ, CAN_WRITE },
    Values  : [ 1 .. 10000, step size: 1 ],
    Default : 166
  Exposure, Auto
    ID      : 0x0000000f,
    Type    : Choice,
    Flags   : { CAN_READ, CAN_WRITE },
    Values  : { 'Auto Mode'[0], 'Manual Mode'[1], 'Shutter Priority Mode'[2], 'Aperture Priority Mode'[3] },
    Default : 3
  Backlight Compensation
    ID      : 0x0000000c,
    Type    : Dword,
    Flags   : { CAN_READ, CAN_WRITE },
    Values  : [ 0 .. 1, step size: 1 ],
    Default : 1
  Sharpness
    ID      : 0x00000007,
    Type    : Dword,
    Flags   : { CAN_READ, CAN_WRITE },
    Values  : [ 0 .. 255, step size: 1 ],
    Default : 20
  White Balance Temperature
    ID      : 0x00000008,
    Type    : Dword,
    Flags   : { CAN_READ, CAN_WRITE },
    Values  : [ 0 .. 10000, step size: 10 ],
    Default : 4000
  Power Line Frequency
    ID      : 0x0000000d,
    Type    : Choice,
    Flags   : { CAN_READ, CAN_WRITE },
    Values  : { 'Disabled'[0], '50 Hz'[1], '60 Hz'[2] },
    Default : 2
  Gain
    ID      : 0x00000003,
    Type    : Dword,
    Flags   : { CAN_READ, CAN_WRITE },
    Values  : [ 0 .. 255, step size: 1 ],
    Default : 0
  White Balance Temperature, Auto
    ID      : 0x00000009,
    Type    : Boolean,
    Flags   : { CAN_READ, CAN_WRITE },
    Values  : [ 0 .. 1, step size: 1 ],
    Default : 1
  Saturation
    ID      : 0x00000004,
    Type    : Dword,
    Flags   : { CAN_READ, CAN_WRITE },
    Values  : [ 0 .. 255, step size: 1 ],
    Default : 38
  Contrast
    ID      : 0x00000002,
    Type    : Dword,
    Flags   : { CAN_READ, CAN_WRITE },
    Values  : [ 0 .. 255, step size: 1 ],
    Default : 32
  Brightness
    ID      : 0x00000001,
    Type    : Dword,
    Flags   : { CAN_READ, CAN_WRITE },
    Values  : [ 0 .. 255, step size: 1 ],
    Default : 128

motion -n :

[0] Processing thread 0 - config file /etc/motion/motion.conf
[0] Motion 3.2.12 Started
[0] ffmpeg LIBAVCODEC_BUILD 3412993 LIBAVFORMAT_BUILD 3415808
[0] Thread 1 is from /etc/motion/motion.conf
[0] motion-httpd/3.2.12 running, accepting connections
[0] motion-httpd: waiting for data on port TCP 8080
[1] Thread 1 started
[1] cap.driver: "uvcvideo"
[1] cap.card: "UVC Camera (046d:0802)"
[1] cap.bus_info: "usb-0000:00:07.2-2"
[1] cap.capabilities=0x04000001
[1] - VIDEO_CAPTURE
[1] - STREAMING
[1] Test palette MJPG (640x480)
[1] Using palette MJPG (640x480) bytesperlines 0 sizeimage 31466 colorspace 00000008
[1] found control 0x00980900, "Brightness", range 0,255
[1]     "Brightness", default 128, current 128
[1] found control 0x00980901, "Contrast", range 0,255
[1]     "Contrast", default 32, current 32
[1] found control 0x00980902, "Saturation", range 0,255
[1]     "Saturation", default 38, current 38
[1] found control 0x00980913, "Gain", range 0,255
[1]     "Gain", default 0, current 0
[1] mmap information:
[1] frames=4
[1] 0 length=31466
[1] 1 length=31466
[1] 2 length=31466
[1] 3 length=31466
[1] Using V4L2
[1] Resizing pre_capture buffer to 1 items
[1] Started stream webcam server in port 8081

Environment

Motion version:	3.2.12
ffmpeg version:
Libraries:	ffmpeg, mysql, postgresql
Server OS:	Debian Squeeze, kernel 2.6.32-5

-- UrosS - 30 Jun 2011

Answer