Setting up SimpleCV with uv4l raspicam driver

Question

I have installed uv4l raspicam driver (driver for the rasberryPi's camera CSI camera module) from here. After installation I have followed this discussion to remove the video preview when I use SimpleCV and to set up 640x480 as resolution. It works, but now I have some problems to set up the camera properties like width and height in SimpleCV. When I run:

from SimpleCV import *
c = Camera()
im = c.getImage()

im.show()

it runs as a 64x64 window instead of 640x480. So, here the user fixed this problem, but when I change my code with:

from SimpleCV import *
    c = Camera(prop_set={"width":640,"height":480})
    im = c.getImage()

    im.show()

it returns me an error:

[0] WARNING: caught exception: SystemError('/dev/video0 does not support streaming i/o',) WARNING: SimpleCV can't seem to find a camera on your system, or the drivers do not work with SimpleCV.

Traceback (most recent call last): File "/home/pi/Desktop/sorgenti/Simple_CV_acq.py", line 17, in <module> im = c.getImage() File "/home/pi/Code/SimpleCV/SimpleCV/Camera.py", line 618, in getImage cv.GrabFrame(self.capture) TypeError: Expected CvCapture for argument 'capture'

How can I set properties of the cam in SimpleCV ?

Answer 1

You need to export the environment variable.

export LD_PRELOAD=/usr/lib/uv4l/uv4lext/armv6l/libuv4lext.so