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[youtube] Support automatic captions with original language different from English (fixes #1225) and download in multiple languages.

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This commit is contained in:
Jaime Marquínez Ferrándiz 2013-09-11 19:02:01 +02:00
parent ac4f319ba1
commit 055e6f3657
2 changed files with 47 additions and 41 deletions
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25
youtube_dl/extractor/subtitles.py
View File

@ -15,15 +15,20 @@ class SubtitlesInfoExtractor(InfoExtractor):
self.to_screen(u'%s: Available subtitles for video: %s' %
(video_id, sub_lang))
def _extract_subtitles(self, video_id):
def extract_subtitles(self, video_id, video_webpage=None):
""" returns {sub_lang: sub} or {} if subtitles not found """
if self._downloader.params.get('writesubtitles', False) or self._downloader.params.get('allsubtitles', False):
available_subs_list = self._get_available_subtitles(video_id)
elif self._downloader.params.get('writeautomaticsub', False):
available_subs_list = self._get_available_automatic_caption(video_id, video_webpage)
else:
return None
if not available_subs_list: # error, it didn't get the available subtitles
return {}
if self._downloader.params.get('allsubtitles', False):
sub_lang_list = available_subs_list
else:
if self._downloader.params.get('writesubtitles', False):
if self._downloader.params.get('subtitleslangs', False):
requested_langs = self._downloader.params.get('subtitleslangs')
elif 'en' in available_subs_list:
@ -64,23 +69,11 @@ class SubtitlesInfoExtractor(InfoExtractor):
"""
pass
def _request_automatic_caption(self, video_id, webpage):
def _get_available_automatic_caption(self, video_id, webpage):
"""
returns {sub_lang: sub} or {} if not available
returns {sub_lang: url} or {} if not available
Must be redefined by the subclasses that support automatic captions,
otherwise it will return {}
"""
self._downloader.report_warning(u'Automatic Captions not supported by this server')
return {}
def extract_subtitles(self, video_id, video_webpage=None):
"""
Extract the subtitles and/or the automatic captions if requested.
Returns None or a dictionary in the format {sub_lang: sub}
"""
video_subtitles = None
if self._downloader.params.get('writesubtitles', False) or self._downloader.params.get('allsubtitles', False):
video_subtitles = self._extract_subtitles(video_id)
elif self._downloader.params.get('writeautomaticsub', False):
video_subtitles = self._request_automatic_caption(video_id, video_webpage)
return video_subtitles

27
youtube_dl/extractor/youtube.py
View File

@ -5,6 +5,7 @@ import netrc
import re
import socket
import itertools
import xml.etree.ElementTree
from .common import InfoExtractor, SearchInfoExtractor
from .subtitles import SubtitlesInfoExtractor
@ -478,14 +479,13 @@ class YoutubeIE(YoutubeBaseInfoExtractor, SubtitlesInfoExtractor):
return {}
return sub_lang_list
def _request_automatic_caption(self, video_id, webpage):
def _get_available_automatic_caption(self, video_id, webpage):
"""We need the webpage for getting the captions url, pass it as an
argument to speed up the process."""
sub_lang = (self._downloader.params.get('subtitleslangs') or ['en'])[0]
sub_format = self._downloader.params.get('subtitlesformat')
self.to_screen(u'%s: Looking for automatic captions' % video_id)
mobj = re.search(r';ytplayer.config = ({.*?});', webpage)
err_msg = u'Couldn\'t find automatic captions for "%s"' % sub_lang
err_msg = u'Couldn\'t find automatic captions for %s' % video_id
if mobj is None:
self._downloader.report_warning(err_msg)
return {}
@ -494,16 +494,29 @@ class YoutubeIE(YoutubeBaseInfoExtractor, SubtitlesInfoExtractor):
args = player_config[u'args']
caption_url = args[u'ttsurl']
timestamp = args[u'timestamp']
# We get the available subtitles
list_params = compat_urllib_parse.urlencode({
'type': 'list',
'tlangs': 1,
'asrs': 1,
})
list_url = caption_url + '&' + list_params
list_page = self._download_webpage(list_url, video_id)
caption_list = xml.etree.ElementTree.fromstring(list_page.encode('utf-8'))
original_lang = caption_list.find('track').attrib['lang_code']
sub_lang_list = {}
for lang_node in caption_list.findall('target'):
sub_lang = lang_node.attrib['lang_code']
params = compat_urllib_parse.urlencode({
'lang': 'en',
'lang': original_lang,
'tlang': sub_lang,
'fmt': sub_format,
'ts': timestamp,
'kind': 'asr',
})
subtitles_url = caption_url + '&' + params
sub = self._download_webpage(subtitles_url, video_id, u'Downloading automatic captions')
return {sub_lang: sub}
sub_lang_list[sub_lang] = caption_url + '&' + params
return sub_lang_list
# An extractor error can be raise by the download process if there are
# no automatic captions but there are subtitles
except (KeyError, ExtractorError):