OpenCV VideoCapture无法在Python中阅读视频，但在VS11中却无法读取视频 [英] OpenCV VideoCapture cannot read video in Python but able in VS11

问题描述

作为标题，我无法使用以下代码在python中使用VideoCapture来阅读视频：

  v ='C ：\\test.mp4'
 import cv2 
 cap = cv2.VideoCapture（v）
如果cap.isOpened（）：
打印最后
其他：
打印BOOM
  

BOOM始终被打印。

而在VS11中，以下代码正常工作：

  #includestdafx.h
 
 #include< opencv2\highgui\highgui.hpp> 
 #include< iostream> 
 
使用命名空间cv; 
使用命名空间std; 
 
 int main（int argc，char * argv []）
 {
 string v =C：\\test.mp4; 
 VideoCapture cap; 
 cap.open（v）; 
 if（cap.isOpened（））{
 cout<<< 是！ << ENDL; 
} else {
 cout<<< BOOM<< ENDL; 
} 
 
 return 0; 
} 
  

我意识到SO中有一个解决方案，但对我来说没有用。
我有C：\Python27和C：\Python27 \DLLs以及PATH中的以下dll

• opencv_ffmpeg.dll


• opencv_ffmpeg_64.dll


• opencv_ffmpeg_245_64.dll


• opencv_ffmpeg_245.dll

我不知道还没有做。

请帮助我。非常感谢你。

解决方案

我已经通过从这个下载链接由这个答案。

它将所有opencv DLL复制到C：\Python27（或可能是其他文件）。但是我不明白为什么它不会早期工作，因为我已经将这些DLL包含在我的路径中

As title, I am not able to read video using VideoCapture in python with the following code:

v = 'C:\\test.mp4'
import cv2
cap = cv2.VideoCapture(v)
if cap.isOpened():
  print "Finally"
else:
  print "BOOM"

BOOM is always being printed. sigh

Whereas in VS11, the following code works:

#include "stdafx.h"

#include <opencv2\highgui\highgui.hpp>
#include <iostream>

using namespace cv;
using namespace std;

int main(int argc, char* argv[])
{
    string v = "C:\\test.mp4";
    VideoCapture cap;
    cap.open(v);
    if (cap.isOpened()) {
        cout << "Yes!" << endl;
    } else {
        cout << "BOOM" << endl;
    }

    return 0;
}

I do realize there's a number solution in SO, but nothing works for me. I have the following dlls in C:\Python27 and C:\Python27\DLLs, as well as in PATH

• opencv_ffmpeg.dll
• opencv_ffmpeg_64.dll
• opencv_ffmpeg_245_64.dll
• opencv_ffmpeg_245.dll

I have no more idea what have not done.

Please help me. Thank you very much.

解决方案

I have solved the problem by installing the binaries from this download link provided by this answer.

It copied all opencv DLLs to C:\Python27 (or maybe other files). But I don't understand why it wouldn't work earlier as I have already included those DLLs into my PATH

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