如何在 python 脚本中使用 youtube-dl 从播放列表中检索单个视频 URL？

Question

我正在尝试：

在 Python 脚本中使用 youtube-dl 定期下载视频
Organize/name 由 youtube 数据动态显示的视频，即 %(title)s
提取 audio/MP3 并将这些文件移动到名为 'MP3'

我是 Python 的新手，我敢肯定其中有一些乱七八糟、不必要的代码；所以，我也愿意接受 clean-up 建议。

我遇到了一个问题，当我输入播放列表 url（而不是个人 url）时，我只是得到播放列表名称而不是个人标题，上传者数据我用于对文件进行排序。（而且我不知道如何或是否可以在整个代码中使用 outmpl option/variable）

我其实把代码分成了三个pieces/modules。

问题的基本例子是这样的——我输入：

outmpl: 'F:\Videos\Online Videos\Comics\%(uploader)s\%(playlist)s\%(playlist_index)s_%(title)s.%(ext)s'

将视频保存到：

'F:\Videos\Online Videos\Comics\Comicstorian\Annhililation\01_Annihilation Beginnings Drax Earthfall - Complete Story.mp4' - and so on (for the rest of the videos)

但是，我不知道将目录变量传递到我移动文件的模块。

这是代码-三个modules/parts

PyFile_Download_Exmple.py

from __future__ import unicode_literals
import youtube_dl
import Move_MP3
import ytdl_variables

#Uses variables from ytdl_variables script and downloads the video

with youtube_dl.YoutubeDL(ytdl_variables.ydl_opts) as ydl:
    ydl.download([ytdl_variables.video_url])

#Calls script to create folder and move MP3 files
Move_MP3

ytdl_variables.py

from __future__ import unicode_literals
import youtube_dl

global video_title, uploader, playlist, playlist_index, video_url, ydl_opts, ydl

video_url = 'https://www.youtube.com/playlist?list=PL6FhCd_HO_ACJzTiLKfETgzLc1an_t05i'


ydl_opts = {
    'format': 'bestvideo[ext=mp4]+bestaudio[ext=m4a]/best[ext=mp4]/best',
    'outtmpl': 'F:\Videos\Online Videos\Comics\%(uploader)s\%(playlist)s\%(playlist_index)s_%(title)s.%(ext)s',
    'postprocessors': [{
        'key': 'FFmpegExtractAudio',
        'preferredcodec': 'mp3',
        'preferredquality': '192',
    }],
    'download_archive': 'F:\Videos\Online Videos\Archive.txt',
}

with youtube_dl.YoutubeDL(ydl_opts) as ydl:
        #The next part creates a variable that returns info when provided the video_url variable >> 
        '''
            Code here should get take the youtube playlist and spit out
            each url to move to the next step as vLinks variable, but
            I haven't figured out how to pass (title) etc. variables from 
           each video in a playlist.



  link = individual video url from playlist

The following puts actual info into variables for Python to use. These are made global above. I made a 'for' loop to repeat grabbing info for each video - but it doesn't work right now b/c I didn't define vLinks.
'''
    for vLink in vLinks:
        info_dict = ydl.extract_info(link, download=False)
        video_title = info_dict.get('title', None)
        playlist_index = info_dict.get('playlist_index', None)
        playlist = info_dict.get('playlist', None)
        uploader = info_dict.get('uploader', None)
        print(video_title)

#Checks if the video is in a playlist; if it's not, 'NA' will be the string returned: 

if playlist is None:
    playlist = 'NA'

if playlist_index is None:
    playlist_index = 'NA'

Move_MP3

from __future__ import unicode_literals
import ytdl_variables
import shutil
import os, os.path

#Sets variables for renaming the files
newfolder = 'F:\Videos\Online Videos\Comics\' + ytdl_variables.uploader + '\' + ytdl_variables.playlist + '\MP3\'
oa_savedir = 'F:\Videos\Online Videos\Comics\' + ytdl_variables.uploader + '\' + ytdl_variables.playlist + '\' + ytdl_variables.playlist_index + '_' + ytdl_variables.video_title + '.mp3'
fa_savedir = 'F:\Videos\Online Videos\Comics\' + ytdl_variables.uploader + '\' + ytdl_variables.playlist + '\MP3\' + ytdl_variables.playlist_index + '_' + ytdl_variables.video_title + '.mp3'

#Function that creates file directory before moving file there - changed from 
def mkdir_p(path):
    if not os.path.exists(path):
        os.makedirs(path);

#Function that checks whether the file already exists where I want to move it >> http://stackabuse.com/python-check-if-a-file-or-directory-exists/
def chkfl_p(path):
    if not os.path.isfile(path):
        shutil.move(oa_savedir, fa_savedir);

#Calls function to look for \MP3 directory and creates directory if it doesn't exist
mkdir_p(newfolder)
#Calls function to look for file and moves file if it isn't already there
chkfl_p(fa_savedir)

Answer 1

我正在努力清理它，但我在另一个答案的一部分中发现了答案...

从播放列表中获取单个链接 url:

ydl = youtube_dl.YoutubeDL({'outtmpl': '%(id)s%(ext)s', 'quiet':True,})
video = ""

with ydl:
    result = ydl.extract_info \
    (yt_url,
    download=False) #We just want to extract the info

    if 'entries' in result:
        # Can be a playlist or a list of videos
        video = result['entries']

        #loops entries to grab each video_url
        for i, item in enumerate(video):
            video = result['entries'][i]

youtube_dl.YoutubeDL 似乎 return JSON 来自 YouTube API 的数据 yt_url 是视频或播放列表的变量。

如果 returned 数据有 "entries" 它是一个播放列表 - 然后我循环那些每个条目（用 i(ndex) 枚举条目） - 从那里我可以做我想做的事url 或其他信息。

result['entries'][i]['webpage_url']     #url of video
result['entries'][i]['title']           #title of video
result['entries'][i]['uploader']        #username of uploader
result['entries'][i]['playlist']        #name of the playlist
result['entries'][i]['playlist_index']  #order number of video

如何在 python 脚本中使用 youtube-dl 从播放列表中检索单个视频 URL？

How do I retrieve individual video URLs from a playlist, using youtube-dl within a python script?

python

python-2.7

youtube-dl