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from urllib.request import urlopen
from bs4 import BeautifulSoup
from isodate import parse_duration # type: ignore
def obtain_vid_duration(url: str, html: str = '') -> int:
html = html or urlopen(url).read().decode('utf-8')
soup = BeautifulSoup(html, 'html.parser')
duration_meta = soup.find('meta', itemprop='duration')
assert duration_meta
duration = parse_duration(duration_meta['content'])
return int(duration.total_seconds())
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