是否可以使用OpenCV将https://(例如YouTube)的视频流传输到python中? [英] Is it possible to stream video from https:// (e.g. YouTube) into python with OpenCV?

问题描述

此链接有一个关于如何使用python的OpenCV库cv2的整洁小示例，该数据将相机中的数据流传输到python shell中.我正在尝试做一些实验，并希望使用以下YouTube视频供稿:https://www.youtube.com/watch?v=oCUqsPLvYBQ.

This link has a tidy little example of how to use python's OpenCV library, cv2 to stream data from a camera into your python shell. I'm looking to do some experiments and would like to use the following YouTube video feed: https://www.youtube.com/watch?v=oCUqsPLvYBQ.

我尝试将示例修改如下:

I've tried adapting the example as follows:

import numpy as np
import cv2

cap = cv2.VideoCapture('https://www.youtube.com/watch?v=oCUqsPLvYBQ')

while(True):
    # Capture frame-by-frame
    ret, frame = cap.read()

    # Display the resulting frame
    cv2.imshow('frame',frame)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

哪个会产生错误:

WARNING: Couldn't read movie file https://www.youtube.com/watch?v=oCUqsPLvYBQ
OpenCV Error: Assertion failed (size.width>0 && size.height>0) in imshow, file /tmp/opencv20160107-29960-t5glvv/opencv-2.4.12/modules/highgui/src/window.cpp, line 261

是否有一个简单的修复程序，可以让我通过cv2将此视频提要流式传输到python shell中?如果有其他可以实现相同目的的库，也不是绝对致力于cv2.

Is there a simple fix that would allow me to stream this video feed into my python shell via cv2? Not absolutely committed to cv2, either, if there are other libraries out there that will accomplish the same purpose.

推荐答案

您需要安装2件东西

1. pafy(通过pip安装pafy)
2. youtube_dl(sudo pip安装--upgrade youtube_dl)

安装这两个软件包后，您可以使用youtube网址播放youtube上的流视频. 请参考下面的代码

after installing these two packages you can use the youtube url to play the streaming videos from youtube. Please refer the code below

url = 'https://youtu.be/W1yKqFZ34y4'
vPafy = pafy.new(url)
play = vPafy.getbest(preftype="webm")

#start the video
cap = cv2.VideoCapture(play.url)
while (True):
    ret,frame = cap.read()
    """
    your code here
    """
    cv2.imshow('frame',frame)
    if cv2.waitKey(20) & 0xFF == ord('q'):
        break    

cap.release()
cv2.destroyAllWindows()

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