有没有一种方法可以使用Python读取和处理相机的帧，然后将其保存到文件中。没有使用像OpenCV这样的库？

Question

这是我目前拥有的，但它的阅读速度非常慢。仅仅用opencv读取帧就需要6-8秒，对于我的项目，我需要能够在读取压力传感器时以特定的间隔获取图片。有没有一种方法可以让这个程序在cv2或can上运行得更快？有没有一种方法可以使用阵列，或者什么方法可以让程序运行得更快

import cv2
import timeit
def main(): #Define camera function
    start = timeit.default_timer() #Starts a runtime timer
    hud_Cam = cv2.VideoCapture(0) #Call camera resource
    gauge_Cam = cv2.VideoCapture(1)
    rval, hud_Img = hud_Cam.read() #Read/Grab camera frame
    rval, gauge_Img = gauge_Cam.read()
    stop = timeit.default_timer() #Stops a runtime timer
    print('Time: ', stop - start) #Calculate runtime timer
    start1 = timeit.default_timer() #Starts a runtime timer
    hud_name = ('HudPicture0.jpg') #Initialize file names
    gauge_name = ('GaugePicture0.jpg')
    cv2.imwrite(hud_name, hud_Img) #Write camera frame to file names
    cv2.imwrite(gauge_name, gauge_Img)
    print("Hud Picture written!") #Log to console
    print("Gauge Picture written!")
    hud_Cam.release() #Release camera resource to clear memory
    gauge_Cam.release()
    stop1 = timeit.default_timer() #Stops a runtime timer
    print('Time: ', stop1 - start1) #Calculate runtime timer```

Answer 1

这使得时间下降到，时间：2.066412200000059

import timeit
start = timeit.default_timer()
import cv2
hud_Cam = cv2.VideoCapture(0, cv2.CAP_DSHOW) #Call camera resource
gauge_Cam = cv2.VideoCapture(1, cv2.CAP_DSHOW)

def main(hud_Cam, gauge_Cam, start): #Define camera function
    while True:
        rval, hud_Img = hud_Cam.read() #Read/Grab camera frame
        rval, gauge_Img = gauge_Cam.read()
        hud_name = ('HudPicture0.jpg') #Initialize file names
        gauge_name = ('GaugePicture0.jpg')
        cv2.imwrite(hud_name, hud_Img) #Write camera frame to file names
        cv2.imwrite(gauge_name, gauge_Img)
        print("Hud Picture written!") #Log to console
        print("Gauge Picture written!")
        hud_Cam.release() #Release camera resource to clear memory
        gauge_Cam.release()
        stop = timeit.default_timer()
        print('Time: ', stop - start) #Calculate runtime timer
        break
# =============================================================================
    while True:
        img1 = cv2.imread(hud_name)
        img2 = cv2.imread(gauge_name)
        cv2.imshow("Hud Image", img1)
        cv2.imshow("Gauge Image", img2)
        k = cv2.waitKey(60)
        if k%256 == 27:
            cv2.destroyAllWindows()
            break

main(hud_Cam, gauge_Cam, start) #Call camera function```