源码
import numpy as np
cap=cv2.VideoCapture(0)
while(1):
ret , frame = cap.read()
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
cv2.imshow('frame', gray)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
cap.release()
cv2.destroyAllWindows()
error如下：
图片.png
Traceback (most recent call last):
File "/home/yewii/python项目/opencv/try.py", line 9, in <module>
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
cv2.error: /io/opencv/modules/imgproc/src/color.cpp:10638: error: (-215) scn == 3 || scn == 4 in function cvtColor
解决方案：
因为Ubuntu摄像头获取的视频格式是webm
下了一个XviD解码器，导入使用
参考关于opencv中不能读取视频avi的问题
| Container | FourCC | Name | Description |
|---|---|---|---|
| AVI | 'DIB ' | RGB(A) | Uncompressed RGB, 24 or 32 bit |
| AVI | 'I420' | RAW I420 | Uncompressed YUV, 4:2:0 chroma subsampled |
| AVI | 'IYUV' | RAW I420 | identical to I420 |
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