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使用OpenCV-Python外接摄像头打不开
情况描述
使用OpenCV-Python打开摄像头常用的代码是这样的： import cv2 as cv cap = cv.VideoCapture(0) flag = cap.isOpened() while (flag): ret, frame = cap.read()笔者采用这种方法来打开电脑自带的摄像头是没有问题的，但是近期购入的一个新的摄像头，发现采用这种方式打开会提示： WARN:0] global C:\projects\opencv-python\opencv\modules\videoio\src\cap_msmf.cpp (1113) SourceReaderCB::OnReadSample videoio(MSMF): OnReadSample() is called with error status: -1072875772 [ WARN:0] global C:\projects\opencv-python\opencv\modules\videoio\src\cap_msmf.cpp (1125) SourceReaderCB::OnReadSample videoio(MSMF): async ReadSample() call is failed with error status: -1072875772 [ WARN:1] global C:\projects\opencv-python\opencv\modules\videoio\src\cap_msmf.cpp (1159) CvCapture_MSMF::grabFrame videoio(MSMF): can't grab frame. Error: -1072875772 [ WARN:1] global C:\projects\opencv-python\opencv\modules\videoio\src\cap_msmf.cpp (674) SourceReaderCB::~SourceReaderCB terminating async callback经查阅资料 在VideoCapture后加上cv.CAP_DSHOW 修正后代码如下： import cv2 as cv cap = cv.VideoCapture(1,cv.CAP_DSHOW) #更改API设置 flag = cap.isOpened() index = 1 while (flag): ret, frame = cap.read() frame = cv.flip(frame, 1) # 水平翻转 cv.imshow("Capture_Paizhao", frame) k = cv.waitKey(1) & 0xFF if k == ord('s'): # 按下s键，进入下面的保存图片操作 cv.imwrite(r"F:\PyCharm\Camera calibration\Aruco_Identify\0" + str(index) + ".jpg", frame) print(cap.get(3)) print(cap.get(4)) print("save" + str(index) + ".jpg successfuly!") print("-------------------------") index += 1 elif k == ord('q'): # 按下q键，程序退出 break cap.release() cv.destroyAllWindows() |
找到了问题所在，采用默认的API控制出错。【本文地址】