python腳本下載YouTube視頻

在給予YouTube視頻網址，我首先下載的視頻頁面，並提取JavaScript對象python腳本下載YouTube視頻

<script>var ytplayer = ytplayer ..... </script>

之間我

{ 

    "args": { 
     "is_listed": "1", 
     "account_playback_token": "QUFFLUhqbWdXR1NfQjRiRmNzWVhRVTM0ajlNcnM1alVUd3xBQ3Jtc0tsVi01WFp5VmV2MTU3RnpkYUVkRzVqR1ZTNUI4T2JaQzk1ckxPejdVNkYzUk5zOTdjZnNmb1BYZHNLQ05nblZZbFk2ZWJXNHRPNVFoNVVNc2RjTE1YekdKSGY4dlVhSnlCU1ctNFZJdXBKbWhIRG1TZw==", 
     "ptk": "RajshriEntertainment", 
     "focEnabled": "1", 
     "tag_for_child_directed": false, 
     "adaptive_fmts": ......, 
     "probe_url": ....., 
     "rmktEnabled": "1", 
     "allow_ratings": "1", 
     "dbp": "ChoKFk5RNTV5UGs5bDZmSk5wSjQ4a3RiSHcQARABGAI", 
     "cc3_module": "1", 
     "no_get_video_log": "1", 
     "fmt_list": ......, 
     "title":.........., 
     "invideo": true, 
     "sffb": true, 
     "iurlmq_webp": , 
     "cosver": "10_8_4", 
     "url_encoded_fmt_stream_map": ................., 
     "max_dynamic_allocation_ad_tag_length": "2040", 
     "innertube_api_key": "AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8", 
     "timestamp": "1446586407", 
     "cc_asr": "1", 
     "apiary_host_firstparty": "", 
     "adsense_video_doc_id": "yt_Vd4iNPuRlx4", 
     "innertube_context_client_version": "1.20151102", 
     "mpu": true, 
     "tmi": "1", 
     "ldpj": "-19", 
     "fade_out_duration_milliseconds": "1000", 
     ......... 
} 
}

我發現關鍵adaptive_fmts和url_encoded_fmt_stream_map包含百分比編碼形式的多個網址。我從url_encoded_fmt_stream_map它看起來像這樣

https://r1---sn-o3o-qxal.googlevideo.com/videoplayback? 
ratebypass=yes& 
signature=982E413BBE08CA5801420F9696E0F2ED691B99FA.D666D39D1A0AF066F76F12632A10D3B8076076CE& 
lmt=1443906393476832& 
expire=1446604919& 
fexp=9406983%2C9408710%2C9414764%2C9416126%2C9417707%2C9421410%2C9422596%2C9423663& 
itag=22& 
dur=128.801& 
source=youtube& 
upn=pk2CEhVBeFM& 
sver=3& 
key=yt6& 
id=o-AK-OlE5NUsbkp51EZY2yKuz5vsSGofgUvrvTtOrhC72e& 
sparams=dur%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Cratebypass%2Crequiressl%2Csource%2Cupn%2Cexpire& 
mime=video%2Fmp4& 
ipbits=0& 
pl=21& 
ip=x.y.z.a& 
initcwndbps=5405000& 
requiressl=yes& 
mn=sn-o3o-qxal& 
mm=31& 
ms=au& 
mv=m& 
mt=1446583222& 
itag=22& 
type=video/mp4

一個URL，但是當我貼的瀏覽器沒有這個（以上）的URL發生的，我的意思是不行的。請幫幫我。

而且

是什麼adaptive_fmts和含url_encoded_fmt_stream_map URL之間的區別？

來源

2015-11-03 iammehrabalam

我不能幫你的問題，但是從YouTube下載最好的辦法可能是['YouTube的-dl'（https：//開頭rg3.github.io/youtube-dl/）。工作非常好，並且有很多支持。 – BoppreH

@BoppreH感謝評論，但我想寫我自己的腳本 – iammehrabalam

'youtube-dl'是Python。下載並閱讀源代碼。 – RobertB

在python2.7，這個工程：

import urlparse, urllib2 

vid  = "vzS1Vkpsi5k" 
save_title = "YouTube SpaceX - Booster Number 4 - Thaicom 8 06-06-2016" 
url_init = "https://www.youtube.com/get_video_info?video_id=" + vid 

resp = urllib2.urlopen(url_init, timeout=10) 
data = resp.read() 
info = urlparse.parse_qs(data) 
title = info['title'] 

print "length: ", info['length_seconds'][0] + " seconds" 

stream_map = info['adaptive_fmts'][0] 
vid_info  = stream_map.split(",") 

mp4_filename = save_title + ".mp4" 

for video in vid_info: 
    item = urlparse.parse_qs(video) 

    #print 'quality: ', item['quality'][0] 
    #print 'type: ', item['type'][0] 

    url_download = item['url'][0] 
    resp   = urllib2.urlopen(url_download) 

    print resp.headers 

    length = int(resp.headers['Content-Length']) 
    my_file = open(mp4_filename, "w+") 

    done, i = 0, 0 
    buff = resp.read(1024)   
    while buff: 

     my_file.write(buff) 
     done += 1024 
     percent = done * 100.0/length 
     buff = resp.read(1024) 

     if not i%1000:     
      percent = done * 100.0/length 
      print str(percent) + "%" 

     i += 1 
    break

來源

2017-04-01 17:45:06 Montmons

python腳本下載YouTube視頻

回答

相關問題