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Code Issues Releases Wiki Activity

Correct Video ID if base64 is wrong

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This commit is contained in:
Jeremy Mahieu 2020-04-29 21:49:17 +02:00
parent 2468a6fa64
commit 56359a6db7
1 changed files with 16 additions and 3 deletions
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19
youtube_dl/extractor/youtube.py
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@ -10,6 +10,7 @@ import random
import re
import time
import traceback
import base64
from .common import InfoExtractor, SearchInfoExtractor
from ..jsinterp import JSInterpreter
@ -1609,12 +1610,24 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
return urls[0] if urls else None
@classmethod
def extract_id(cls, url):
def extract_id(cls, self, url):
mobj = re.match(cls._VALID_URL, url, re.VERBOSE)
if mobj is None:
raise ExtractorError('Invalid URL: %s' % url)
video_id = mobj.group(2)
return video_id
# video_id is a result of a base64 encoding
# due to the padding multiple video ids can lead to the same video
# these wrong ids work but not always (not for age-gated videos)
# it can be detected and corrected
video_id_padded = video_id + '=' * ((4 - len(video_id) % 4) % 4) # add padding, required for decode
decoded_bytes = base64.urlsafe_b64decode(video_id_padded)
real_video_id = base64.urlsafe_b64encode(decoded_bytes).decode("utf-8").replace('=','') # remove padding again
if real_video_id != video_id:
self.to_screen('Detected wrong video id %s, trying corrected id %s' % (video_id, real_video_id))
return real_video_id
@staticmethod
def _extract_chapters(description, duration):
@ -1674,7 +1687,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
mobj = re.search(self._NEXT_URL_RE, url)
if mobj:
url = proto + '://www.youtube.com/' + compat_urllib_parse_unquote(mobj.group(1)).lstrip('/')
video_id = self.extract_id(url)
video_id = self.extract_id(self, url)
# Get video webpage
url = proto + '://www.youtube.com/watch?v=%s&gl=US&hl=en&has_verified=1&bpctr=9999999999' % video_id