Key is not writable

[noe-tiger]

Hi, i am trying to change some of the camera parameters like the 'DecimationVertical' Here is my code :

cam = pypylon.factory.create_device(device_name) cam.open() cam.properties['PixelFormat'] = 'Mono8' cam.properties['DecimationVertical'] = 2 cam.close()

It gave me this error :

File "mypath/test.py", line 4 cam.properties['DecimationVertical'] = 2 File "cython\factory.pyx", line 123, in pypylon.cython.factory._PropertyMap.setitem OSError: Key is not writable

Does anyone have an idea for doing this ?