cv2.VideoCapture(0)获取USB摄像头失败解决方案

最新推荐文章于 2025-06-04 16:57:46 发布

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最新推荐文章于 2025-06-04 16:57:46 发布 · 3.3w 阅读

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CC 4.0 BY-SA版权

文章标签：

#openCV #VideoCapture #python #摄像头

问题：台式机没有摄像头，外接USB摄像头，通过 cv2.VideoCapture(0)捕获视频图像报错

[ WARN:0] videoio(MSMF): OnReadSample() is called with error status: -2147024809
[ WARN:0] videoio(MSMF): async ReadSample() call is failed with error status: -2147024809
[ WARN:1] videoio(MSMF): can't grab frame. Error: -2147024809
[ WARN:1] terminating async callback

如果是在笔记本上，默认摄像头是自带的那个摄像头，索引号为0，可是如果外接USB摄像头，它的索引号就不一定是0 ，或者像大多数博客中写道的1,2,3……

解决方案：修改源代码，循环暴力破解摄像头设备ID

import cv2
ID = 0
while(1):
    cap = cv2.VideoCapture(ID)
    # get a frame
    ret, frame = cap.read()
    if ret == False:
        ID += 1
    else:
        print(ID)
        break

[ WARN:0] videoio(MSMF): OnReadSample() is called with error status: -2147024809
[ WARN:0] videoio(MSMF): async ReadSample() call is failed with error status: -2147024809
[ WARN:1] videoio(MSMF): can't grab frame. E