如何在python脚本中从youtube-dl中提取文件大小？

Question

我是python编程新手。我想在下载前提取视频/音频大小（任何YouTube视频）？

Answer 1

>>> from youtube_dl import YoutubeDL 
>>> url = 'https://www.youtube.com/watch?v=PSYxT9GM0fQ' 
>>> ytdl = YoutubeDL() 
>>> info = ytdl.extract_info(url, download=False) 
[youtube] PSYxT9GM0fQ: Downloading webpage 
[youtube] PSYxT9GM0fQ: Downloading video info webpage 
[youtube] PSYxT9GM0fQ: Extracting video information 
[youtube] PSYxT9GM0fQ: Downloading DASH manifest 
>>> formats = info['formats'] 

格式是字典列表，选择你正在寻找

>>> format = formats[0] 
>>> format['filesize'] 
2594621 

一般

>>> info.keys() 
dict_keys(['extractor_key', 'upload_date', 'thumbnail', 'playlist_index', 'format_id', 'width', 'display_id', 'is_live', 'dislike_count', 'thumbnails', 'annotations', 'age_limit', 'formats', 'id', 'playlist', 'subtitles', 'average_rating', 'player_url', 'height', 'requested_subtitles', 'like_count', 'extractor', 'uploader_id', 'ext', 'automatic_captions', 'format', 'webpage_url', 'end_time', 'uploader', 'webpage_url_basename', 'duration', 'start_time', 'view_count', 'title', 'http_headers', 'description', 'url', 'tags', 'categories']) 

的格式，你可以用它来获得有关YouTube的信息，不同的密钥链接