Unable to open Video File in Python using OpenCV

Question

I have installed OpenCV in Windows 7 (32 bit) and Put the cv2.pyd file in Python Modules Directory and everything is working just fine but except opening of Video file {I have tried 5-6 different kind of extensions but nothing is helping} CODE::

import numpy as np
import cv2
cap = cv2.VideoCapture('vtest.avi')
while(cap.isOpened()):
    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()

the line cap.isOpened() always returns False {i also tried providing absolute path to the video file} but that too return false So please can please anybody help me that why that line is always returning False

Answer 1

我发现解决方案在C:\\opencv\\sources\\3rdparty\\ffmpeg\\opencv_ffmpeg.dll存在一个文件，只需将该文件复制并粘贴到您的Python基本目录中，然后说C:\\Python\\opencv_ffmpeg.dll并将文件重命名为您正在使用的OpenCV版本，例如我的v3.0.0，因此如果您的系统是X64，我必须将其重命名为C:\\Python\\opencv_ffmpeg300.dll ，然后在末尾添加_64，例如C:\\Python\\opencv_ffmpeg300_64.dll