Created
September 17, 2013 06:08
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A tool to fetch subtitles from edx.org
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#!/usr/bin/env python | |
# -*- coding: utf-8 -*- | |
""" | |
The edx.org provides video for download, but the subtitle is | |
only available when watching video online. | |
This script can help to convert the online subtitle to local srt file. | |
Usage: | |
1. Open your Chrome inspector(or other debug tool) | |
2. Visit the video page, find the subtitle url(you can search for "subs") | |
3. run "python edx-sub.py [the url] > your_srt.srt | |
""" | |
import sys | |
import urllib2 | |
from json import loads | |
def main(): | |
f = urllib2.urlopen(sys.argv[1]) | |
json_subs = loads(f.read()) | |
subs = zip(json_subs['start'], json_subs['end'], json_subs['text']) | |
for i, s in enumerate(subs): | |
print "%s\n%s --> %s\n%s\n" % ( | |
i, conv_time(s[0]), conv_time(s[1]), s[2]) | |
def conv_time(num): | |
seconds, ms = divmod(num, 1000) | |
minutes, ss = divmod(seconds, 60) | |
hh, mm = divmod(minutes, 60) | |
return "%.2d:%.2d:%.2d,%.3d" % (hh, mm, ss, ms) | |
if __name__ == "__main__": | |
if len(sys.argv) < 2: | |
print "usage: 1. Use inspector to find the subtitle url, like https://courses.edx.org/123.sjson" | |
print " 2. python %s [subs url] > sub.srt" % sys.argv[0] | |
sys.exit() | |
main() |
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