Jetson camera takes the first 11 pictures the same in loop

[ufukasill]

hello everyone i want to capture 20 photo step by step from csi camera
I am doing a loop but first 11 photo same whatever I do.

import cv2
import os
import time

cycle = 20

dispW=640
dispH=480
flip=2

camSet = 'nvarguscamerasrc !  video/x-raw(memory:NVMM), width=3264, height=2464, format=NV12, framerate=21/1 ! nvvidconv flip-method='+str(flip)+' ! video/x-raw, width='+str(dispW)+', height='+str(dispH)+', format=BGRx ! videoconvert ! video/x-raw, format=BGR ! appsink'
cap = cv2.VideoCapture(camSet)

path = '/home/yum/Desktop/egg'
a = 0

egg_name = input("What's name of egg?\n")
folder = os.path.join(path, egg_name)
os.mkdir(folder)

while cap.isOpened() and a < cycle:
    ret, frame = cap.read()
    cv2.imshow("frame", frame)

    if cv2.waitKey(25) & 0xFF == ord('q'):
        break      
    if not ret:
        print("Unable to read camera..")
        break
    a=a+1
    time.sleep(1)
    cv2.imwrite(path + '/' + egg_name + '/photo_%02d.jpg'%a,frame)


cap.release()
cv2.destroyAllWindows()

this is output image

how can I fix this !

[DaneLLL]

Hi,
At the beginning the exposure time may not fully take effect so the images are dark .This looks to be normal behavior. You may skip the first 10 ~ 15 frames.

[ufukasill]

How can I trick as a code plesase !