我使用brew
遵循本教程:
http://docs.opencv.org/3.1.0/dd/d43/tutorial_py_video_display.html#gsc.tab=0
我能够使用我的网络摄像头但无法读取AVI或MP4文件。每次执行此命令时:
ret, frame = cap.read()
,frame
为None
。
Python 2.7.10 (default, Sep 23 2015, 04:34:14)
[GCC 4.2.1 Compatible Apple LLVM 7.0.0 (clang-700.0.72)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
>>> cv2.__version__
'2.4.12'`
这是脚本:
import cv2
cap = cv2.VideoCapture('drop.avi')
while cap.isOpened():
ret, frame = cap.read() # frame is ALWAYS None.
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
cv2.imshow('frame', gray)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
cap.release()
cv2.destroyAllWindows()
提前感谢您的帮助!
答案 0 :(得分:2)
可以尝试使用python和ffmpeg支持重新安装opencv
brew install opencv --with-ffmpeg -v
但在此之前安装perian