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

问题描述

此链接有关于如何使用 python 的 OpenCV 库 cv2 将数据从相机流式传输到 python shell 的整洁小例子.我想做一些实验，并想使用以下 YouTube 视频源: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

产生错误的原因:

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方法可以让我通过 cv2 将此视频源流式传输到我的 python shell 中?也不是绝对致力于 cv2，如果有其他库可以实现相同的目的.

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

你需要安装 2 个东西

you need to have 2 things installed

1. pafy (pip install pafy)
2. youtube_dl (sudo pip install --upgrade youtube_dl)

安装这两个软件包后，您可以使用 youtube 网址播放来自 youtube 的流媒体视频.请参考以下代码

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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