Hi,
On python and your current setup, you can use v4l2_control and fcntl to manipulate the camera parameters.You will need the Python bindings for the v4l2 userspace api, that can be installed with pip:
pip install v4l2
An example usage:
>>> from v4l2 import *
>>> import fcntl
>>> vd = open('/dev/video0', 'rw')
>>> cp = v4l2_capability()
>>> fcntl.ioctl(vd, VIDIOC_QUERYCAP, cp)
0
To change or read camera properties you need the kernel defined CID. We did that for TX1 and the code looks something like this:
from v4l2 import *
import fcntl
TEGRA_CAMERA_CID_BASE = 10100736
INITIAL_EXPOSURE_LEVEL = 1000
INITIAL_GAIN_LEVEL = 256
vd = open('/dev/video0', 'rw')
# Set initial exposure level
exposure = v4l2_control()
exposure.id = TEGRA_CAMERA_CID_BASE + 1
exposure.value = INITIAL_EXPOSURE_LEVEL;
fcntl.ioctl(vd, VIDIOC_S_CTRL, exposure)
# Set initial gain level
gain = v4l2_control()
gain.id = TEGRA_CAMERA_CID_BASE + 10
gain.value = INITIAL_GAIN_LEVEL;
fcntl.ioctl(vd, VIDIOC_S_CTRL, gain)
There is another v4l2 operation called VIDIOC_G_CTRL, I think you could use that one in a similar way to get the properties instead of setting them.
I hope this helps.