Minimal python example to capture frames with an IDS uEye camera

ueye_example.py

from pyueye import ueye
import numpy as np
import cv2

def main():
    # init camera
    hcam = ueye.HIDS(0)
    ret = ueye.is_InitCamera(hcam, None)
    print(f"initCamera returns {ret}")

    # set color mode
    ret = ueye.is_SetColorMode(hcam, ueye.IS_CM_BGR8_PACKED)
    print(f"SetColorMode IS_CM_BGR8_PACKED returns {ret}")

    # set region of interest
    width = 1280
    height = 1080
    rect_aoi = ueye.IS_RECT()
    rect_aoi.s32X = ueye.int(0)
    rect_aoi.s32Y = ueye.int(0)
    rect_aoi.s32Width = ueye.int(width)
    rect_aoi.s32Height = ueye.int(height)
    ueye.is_AOI(hcam, ueye.IS_AOI_IMAGE_SET_AOI, rect_aoi, ueye.sizeof(rect_aoi))
    print(f"AOI IS_AOI_IMAGE_SET_AOI returns {ret}")

    # allocate memory
    mem_ptr = ueye.c_mem_p()
    mem_id = ueye.int()
    bitspixel = 24 # for colormode = IS_CM_BGR8_PACKED
    ret = ueye.is_AllocImageMem(hcam, width, height, bitspixel,
                                mem_ptr, mem_id)
    print(f"AllocImageMem returns {ret}")
    
    # set active memory region
    ret = ueye.is_SetImageMem(hcam, mem_ptr, mem_id)
    print(f"SetImageMem returns {ret}")

    # continuous capture to memory
    ret = ueye.is_CaptureVideo(hcam, ueye.IS_DONT_WAIT)
    print(f"CaptureVideo returns {ret}")
    
    # get data from camera and display
    lineinc = width * int((bitspixel + 7) / 8)
    while True:
        img = ueye.get_data(mem_ptr, width, height, bitspixel, lineinc, copy=True)
        img = np.reshape(img, (height, width, 3))
        cv2.imshow('uEye Python Example (q to exit)', img)
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break
    cv2.destroyAllWindows()
    
    # cleanup
    ret = ueye.is_StopLiveVideo(hcam, ueye.IS_FORCE_VIDEO_STOP)
    print(f"StopLiveVideo returns {ret}")
    ret = ueye.is_ExitCamera(hcam)
    print(f"ExitCamera returns {ret}")

if __name__ == '__main__':
    main()

Hello! I wonder how I can set up exposure time, gain such parameters?

When I run this code, camera stayed zoomed. Which code part is reasoning this. Can you help me about this?

in line 45 when the img is being retrieved the program exits with this code
Process finished with exit code 139 (interrupted by signal 11:SIGSEGV)

any ideas what is causing this??
all lines returned 1 up til then