OpenCV VideoCapture 无法在 Python 中读取视频，但可以在 VS11 中读取 [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 读取视频:

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 一直在打印.叹息

BOOM is always being printed. sigh

而在 VS11 中，以下代码有效:

Whereas in VS11, the following code works:

#include "stdafx.h"

#include <opencv2highguihighgui.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;
}

我确实意识到 SO 中有一个数字解决方案，但对我来说没有任何效果.我在 C:Python27 和 C:Python27DLLs 以及 PATH 中有以下 dll

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:Python27DLLs, as well as in PATH

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

我不知道还有什么没有做.

I have no more idea what have not done.

请帮帮我.非常感谢.

推荐答案

我已经通过安装这个下载链接由这个答案提供.

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

它将所有 opencv DLL 复制到 C:Python27(或其他文件).但我不明白为什么它不能更早地工作，因为我已经将这些 DLL 包含在我的 PATH 中

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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