Automate video recording when loading raspberries pi3

Question

I wrote python code that contains some opencv code to play with my webcam. I connected it to raspi 3. I want it to start recording automatically at startup (boot). I am using crontab for this.

My Python code is:

import cv

if __name__ == "__main__":
# find the webcam
capture = cv2.VideoCapture(0)
capture1 = capture
# video recorder
fourcc = cv2.cv.CV_FOURCC(*'XVID')  #cv2.VideoWriter_fourcc() does not exist
videoOut = cv2.VideoWriter('out1.avi', fourcc, 10.0, (640, 480))
videoOut1 = cv2.VideoWriter('out2.avi', fourcc, 10.0, (640, 480))
# record video
while (capture.isOpened() and capture1.isOpened()):
    ret, frame = capture.read()
    ret1, frame1 = capture1.read()
    if ret:
        videoOut.write(frame)
        cv2.imshow('Video Stream', frame)



    else:
        break
    if ret1:
        frame1 = cv2.flip(frame1,1)
        videoOut1.write(frame1)
        cv2.imshow('Video Stream1', frame1)

    else:
        break

    # Tiny Pause
    key = cv2.waitKey(1)

capture1.release()
videoOut1.release()
capture.release()
videoOut.release()
cv2.destroyAllWindows()

Then I made a bash script that looks like this:

cd /
cd absolute path to my python file directory
sudo python cam22.py
cd /

cam22.py is the name of my python file

Then I used contrab to run this bash script at runtime by writing

@reboot path to my bash file

After rebooting, two avi files are generated in the same directory, but the video is not recorded, the webcam does not start, which, however, works fine when I execute this bash file myself to run the python file.

, , , (Video Stream: 542): Gtk-Warning **: :

Answer 1

, imshow(), waitkey().

Answer 2

, , crontab . , - .avi .AVI

fourcc = cv2.cv.CV_FOURCC('D', 'I', 'V', 'X')
videoOut = cv2.VideoWriter('output1.AVI', fourcc, 20, (640, 480), 1)
videoOut2 = cv2.VideoWriter('output2.AVI', fourcc, 20, (640, 480), 1)