OpenCV 2.4 VideoCapture在Windows上不起作用 [英] OpenCV 2.4 VideoCapture not working on Windows

问题描述

我正在使用通过以下说明.

我的问题类似于这 ，但我需要Windows机器解决方案.

My problem is similar to this one, but I need Windows machine solution.

问题:当我尝试使用

cap = cv2.VideoCapture(0)
print cap.grab()

它工作正常，但是下面的代码

it works fine, but the following code

cap = cv2.VideoCapture(filename)
print cap.grab()

总是返回False.

always return False.

文件路径正确，绝对且没有空格.

Path to the file is correct, absolute and has no spaces.

我在装有Windows XP和Windows 7的两台计算机上尝试了类似的结果.在Linux(Ubuntu)上，对我来说效果很好.

I tried on two machines with Windows XP and Windows 7 with similar results. On Linux (Ubuntu) it works fine for me.

推荐答案

将C:\OpenCV\3rdparty\ffmpeg\添加到Windows PATH环境变量，或者将opencv_ffmpeg.dll从该目录复制到C:\Python27\或PATH中的目录.或者，使用 http://www.lfd.uci.edu/中的OpenCV二进制文件〜gohlke/pythonlibs/#opencv .

Add C:\OpenCV\3rdparty\ffmpeg\ to the Windows PATH environment variable or copy opencv_ffmpeg.dll from that directory to C:\Python27\ or to a directory that is in the PATH. Alternatively, use the OpenCV binaries from http://www.lfd.uci.edu/~gohlke/pythonlibs/#opencv.

也可能需要重命名opencv_ffmpeg.dll文件.

Renaming the opencv_ffmpeg.dll file may also be necessary.

对于OpenCV版本X.Y.Z
opencv_ffmpeg.dll ==> opencv_ffmpegXYZ.dll

For OpenCV version X.Y.Z
opencv_ffmpeg.dll ==> opencv_ffmpegXYZ.dll

对于64位OpenCV版本X.Y.Z
opencv_ffmpeg.dll ==> opencv_ffmpegXYZ_64.dll

For 64-bit OpenCV version X.Y.Z
opencv_ffmpeg.dll ==> opencv_ffmpegXYZ_64.dll

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