Raspbian USB Webcam commands

raspbianwebcamscontrols.txt

# set manual exposure
v4l2-ctl --set-ctrl exposure_auto=1

# set long exposure
v4l2-ctl --set-ctrl exposure_absolute=10000

# set maxiumum brightness
v4l2-ctl --set-ctrl brightness=64

# set minimum contrast
v4l2-ctl --set-ctrl contrast=0

# list all controls
v4l2-ctl --list-ctrls
                     brightness (int)    : min=-64 max=64 step=1 default=-8193 value=64
                       contrast (int)    : min=0 max=50 step=1 default=57343 value=0
                     saturation (int)    : min=0 max=100 step=1 default=57343 value=32
                            hue (int)    : min=-100 max=100 step=1 default=-8193 value=0
 white_balance_temperature_auto (bool)   : default=1 value=1
                          gamma (int)    : min=100 max=300 step=1 default=57343 value=100
           power_line_frequency (menu)   : min=0 max=2 default=1 value=1
      white_balance_temperature (int)    : min=2800 max=6500 step=10 default=61432 value=4500 flags=inactive
                      sharpness (int)    : min=0 max=10 step=1 default=57343 value=2
         backlight_compensation (int)    : min=0 max=4 step=1 default=57343 value=1
                  exposure_auto (menu)   : min=0 max=3 default=0 value=3
              exposure_absolute (int)    : min=5 max=10000 step=1 default=166 value=166 flags=inactive
                     brightness (int)    : min=-64 max=64 step=1 default=-8193 value=64
                       contrast (int)    : min=0 max=50 step=1 default=57343 value=0
                     saturation (int)    : min=0 max=100 step=1 default=57343 value=32
                            hue (int)    : min=-100 max=100 step=1 default=-8193 value=0
 white_balance_temperature_auto (bool)   : default=1 value=1
                          gamma (int)    : min=100 max=300 step=1 default=57343 value=100
           power_line_frequency (menu)   : min=0 max=2 default=1 value=1
      white_balance_temperature (int)    : min=2800 max=6500 step=10 default=61432 value=4500 flags=inactive
                      sharpness (int)    : min=0 max=10 step=1 default=57343 value=2
         backlight_compensation (int)    : min=0 max=4 step=1 default=57343 value=1