记录一下简单的相机处理程序

import cv2
print(cv2.__version__)
import time

if __name__ == "__main__":

    # 获取摄像头并设置参数
    mCamera1 = cv2.VideoCapture(0,cv2.CAP_DSHOW)
    # [ WARN:0] terminating async callback的解决，添加 cv2.CAP_DSHOW
    mCamera = cv2.VideoCapture(1,cv2.CAP_DSHOW)
    if mCamera.isOpened():
        mCamera.release()
    mCamera.open(1)
    print("  set fourcc:" + str(mCamera.set(cv2.CAP_PROP_FOURCC, cv2.VideoWriter_fourcc(*'MJPG'))))

    print("  set width:" + str(mCamera.set(cv2.CAP_PROP_FRAME_WIDTH, 1600)))
    print("  set height:" + str(mCamera.set(cv2.CAP_PROP_FRAME_HEIGHT, 1200)))
    print("  set fps:" + str(mCamera.set(cv2.CAP_PROP_FPS, 15)))
    print("  set auto return:" + str(mCamera.set(cv2.CAP_PROP_AUTO_EXPOSURE, 0.25)))
    print("  set exposure return:" + str(mCamera.set(cv2.CAP_PROP_EXPOSURE, 0.003)))

    print("  set pos frames return:" + str(mCamera.set(cv2.CAP_PROP_POS_FRAMES, 0)))

    print("  WIDTH:" + str(mCamera.get(cv2.CAP_PROP_FRAME_WIDTH)))
    print("  HEIGHT:" + str(mCamera.get(cv2.CAP_PROP_FRAME_HEIGHT)))
    print("  FPS:" + str(mCamera.get(cv2.CAP_PROP_FPS)))
    print("  AUTO EXPOSURE:" + str(mCamera.get(cv2.CAP_PROP_AUTO_EXPOSURE)))
    print("  EXPOSURE:" + str(mCamera.get(cv2.CAP_PROP_EXPOSURE)))
    print("  pos frames:" + str(mCamera.get(cv2.CAP_PROP_POS_FRAMES)))

    mCamera.grab()
    mCamera.grab()
    mCamera.grab()
    mCamera.grab()
    mCamera.grab()

    ret, frame = mCamera.retrieve()

    # frame = frame[40:790, 90:1390]
    # frame = frame[40:790, 90:1390]
    cv2.imwrite('./2.jpg', frame)

    time.sleep(1)

    mCamera.release()
    mCamera1.release()

参考博客如下

(34条消息) OpenCv设置摄像头参数/获得摄像头参数值_ID-Robot的博客-CSDN博客_opencv 获取摄像头参数

(34条消息) Python 下opencv 应用： 摄像头参数设置_张东轩这个名字都有的博客-CSDN博客_cap.set

(34条消息) opencv在电脑和树莓派上设置曝光度问题_影子鱼Alexios的博客-CSDN博客

(34条消息) 2_OpenCV读写视频_小地瓜重新去华容道工作的博客-CSDN博客

最后

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