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yt-local/youtube/watch.py
James Taylor 2ae81f2a78
Add setting to prefer uni or pair sources and fix selection b/w them 
pair_quality != uni_quality was the wrong condition to check,
since there are cases where the target_resolution is 360, and
there are no pair sources at 360, but there are some at other
resolutions, which would falsely select the pair sources.

Signed-off-by: Jesús <heckyel@hyperbola.info>
2021-08-29 23:17:32 -05:00

754 lines
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import youtube
from youtube import yt_app
from youtube import util, comments, local_playlist, yt_data_extract
from youtube.util import time_utc_isoformat
import settings
from flask import request
import flask
import json
import gevent
import os
import math
import traceback
import urllib
import re
import urllib3.exceptions
try:
with open(os.path.join(settings.data_dir, 'decrypt_function_cache.json'), 'r') as f:
decrypt_cache = json.loads(f.read())['decrypt_cache']
except FileNotFoundError:
decrypt_cache = {}
def get_video_sources(info, target_resolution):
'''return dict with organized sources: {
'uni_sources': [{}, ...], # video and audio in one file
'uni_idx': int, # default unified source index
'pair_sources': [({video}, {audio}), ...],
'pair_idx': int, # default pair source index
}
'''
audio_sources = []
video_only_sources = []
uni_sources = []
pair_sources = []
for fmt in info['formats']:
if not all(fmt[attr] for attr in ('ext', 'url')):
continue
if fmt['ext'] != 'mp4': # temporary until webm support
continue
# unified source
if fmt['acodec'] and fmt['vcodec']:
source = {
'type': 'video/' + fmt['ext'],
'quality_string': short_video_quality_string(fmt),
}
source['quality_string'] += ' (integrated)'
source.update(fmt)
uni_sources.append(source)
continue
if not (fmt['init_range'] and fmt['index_range']):
continue
# audio source
if fmt['acodec'] and not fmt['vcodec'] and fmt['audio_bitrate']:
source = {
'type': 'audio/' + fmt['ext'],
'bitrate': fmt['audio_bitrate'],
'quality_string': audio_quality_string(fmt),
}
source.update(fmt)
source['mime_codec'] = (source['type'] + '; codecs="'
+ source['acodec'] + '"')
audio_sources.append(source)
# video-only source, include audio source
elif all(fmt[attr] for attr in ('vcodec', 'quality', 'width')):
source = {
'type': 'video/' + fmt['ext'],
'quality_string': short_video_quality_string(fmt),
}
source.update(fmt)
source['mime_codec'] = (source['type'] + '; codecs="'
+ source['vcodec'] + '"')
video_only_sources.append(source)
audio_sources.sort(key=lambda source: source['audio_bitrate'])
video_only_sources.sort(key=lambda src: src['quality'])
uni_sources.sort(key=lambda src: src['quality'])
for source in video_only_sources:
# choose an audio source to go with it
# 0.15 is semiarbitrary empirical constant to spread audio sources
# between 144p and 1080p. Use something better eventually.
target_audio_bitrate = source['quality']*source.get('fps', 30)/30*0.15
compat_audios = [a for a in audio_sources if a['ext'] == source['ext']]
if compat_audios:
closest_audio_source = compat_audios[0]
best_err = target_audio_bitrate - compat_audios[0]['audio_bitrate']
best_err = abs(best_err)
for audio_source in compat_audios[1:]:
err = abs(audio_source['audio_bitrate'] - target_audio_bitrate)
# once err gets worse we have passed the closest one
if err > best_err:
break
best_err = err
closest_audio_source = audio_source
pair_sources.append((source, closest_audio_source))
uni_idx = 0 if uni_sources else None
for i, source in enumerate(uni_sources):
if source['quality'] > target_resolution:
break
uni_idx = i
pair_idx = 0 if pair_sources else None
for i, source_pair in enumerate(pair_sources):
if source_pair[0]['quality'] > target_resolution:
break
pair_idx = i
return {
'uni_sources': uni_sources,
'uni_idx': uni_idx,
'pair_sources': pair_sources,
'pair_idx': pair_idx,
}
def make_caption_src(info, lang, auto=False, trans_lang=None):
label = lang
if auto:
label += ' (Automatic)'
if trans_lang:
label += ' -> ' + trans_lang
return {
'url': '/' + yt_data_extract.get_caption_url(info, lang, 'vtt', auto, trans_lang),
'label': label,
'srclang': trans_lang[0:2] if trans_lang else lang[0:2],
'on': False,
}
def lang_in(lang, sequence):
'''Tests if the language is in sequence, with e.g. en and en-US considered the same'''
if lang is None:
return False
lang = lang[0:2]
return lang in (l[0:2] for l in sequence)
def lang_eq(lang1, lang2):
'''Tests if two iso 639-1 codes are equal, with en and en-US considered the same.
Just because the codes are equal does not mean the dialects are mutually intelligible, but this will have to do for now without a complex language model'''
if lang1 is None or lang2 is None:
return False
return lang1[0:2] == lang2[0:2]
def equiv_lang_in(lang, sequence):
'''Extracts a language in sequence which is equivalent to lang.
e.g. if lang is en, extracts en-GB from sequence.
Necessary because if only a specific variant like en-GB is available, can't ask YouTube for simply en. Need to get the available variant.'''
lang = lang[0:2]
for l in sequence:
if l[0:2] == lang:
return l
return None
def get_subtitle_sources(info):
'''Returns these sources, ordered from least to most intelligible:
native_video_lang (Automatic)
foreign_langs (Manual)
native_video_lang (Automatic) -> pref_lang
foreign_langs (Manual) -> pref_lang
native_video_lang (Manual) -> pref_lang
pref_lang (Automatic)
pref_lang (Manual)'''
sources = []
pref_lang = settings.subtitles_language
native_video_lang = None
if info['automatic_caption_languages']:
native_video_lang = info['automatic_caption_languages'][0]
highest_fidelity_is_manual = False
# Sources are added in very specific order outlined above
# More intelligible sources are put further down to avoid browser bug when there are too many languages
# (in firefox, it is impossible to select a language near the top of the list because it is cut off)
# native_video_lang (Automatic)
if native_video_lang and not lang_eq(native_video_lang, pref_lang):
sources.append(make_caption_src(info, native_video_lang, auto=True))
# foreign_langs (Manual)
for lang in info['manual_caption_languages']:
if not lang_eq(lang, pref_lang):
sources.append(make_caption_src(info, lang))
if (lang_in(pref_lang, info['translation_languages'])
and not lang_in(pref_lang, info['automatic_caption_languages'])
and not lang_in(pref_lang, info['manual_caption_languages'])):
# native_video_lang (Automatic) -> pref_lang
if native_video_lang and not lang_eq(pref_lang, native_video_lang):
sources.append(make_caption_src(info, native_video_lang, auto=True, trans_lang=pref_lang))
# foreign_langs (Manual) -> pref_lang
for lang in info['manual_caption_languages']:
if not lang_eq(lang, native_video_lang) and not lang_eq(lang, pref_lang):
sources.append(make_caption_src(info, lang, trans_lang=pref_lang))
# native_video_lang (Manual) -> pref_lang
if lang_in(native_video_lang, info['manual_caption_languages']):
sources.append(make_caption_src(info, native_video_lang, trans_lang=pref_lang))
# pref_lang (Automatic)
if lang_in(pref_lang, info['automatic_caption_languages']):
sources.append(make_caption_src(info, equiv_lang_in(pref_lang, info['automatic_caption_languages']), auto=True))
# pref_lang (Manual)
if lang_in(pref_lang, info['manual_caption_languages']):
sources.append(make_caption_src(info, equiv_lang_in(pref_lang, info['manual_caption_languages'])))
highest_fidelity_is_manual = True
if sources and sources[-1]['srclang'] == pref_lang:
# set as on by default since it's manual a default-on subtitles mode is in settings
if highest_fidelity_is_manual and settings.subtitles_mode > 0:
sources[-1]['on'] = True
# set as on by default since settings indicate to set it as such even if it's not manual
elif settings.subtitles_mode == 2:
sources[-1]['on'] = True
if len(sources) == 0:
assert len(info['automatic_caption_languages']) == 0 and len(info['manual_caption_languages']) == 0
return sources
def get_ordered_music_list_attributes(music_list):
# get the set of attributes which are used by atleast 1 track
# so there isn't an empty, extraneous album column which no tracks use, for example
used_attributes = set()
for track in music_list:
used_attributes = used_attributes | track.keys()
# now put them in the right order
ordered_attributes = []
for attribute in ('Artist', 'Title', 'Album'):
if attribute.lower() in used_attributes:
ordered_attributes.append(attribute)
return ordered_attributes
def save_decrypt_cache():
try:
f = open(os.path.join(settings.data_dir, 'decrypt_function_cache.json'), 'w')
except FileNotFoundError:
os.makedirs(settings.data_dir)
f = open(os.path.join(settings.data_dir, 'decrypt_function_cache.json'), 'w')
f.write(json.dumps({'version': 1, 'decrypt_cache':decrypt_cache}, indent=4, sort_keys=True))
f.close()
watch_headers = (
('Accept', '*/*'),
('Accept-Language', 'en-US,en;q=0.5'),
('X-YouTube-Client-Name', '2'),
('X-YouTube-Client-Version', '2.20180830'),
) + util.mobile_ua
def decrypt_signatures(info, video_id):
'''return error string, or False if no errors'''
if not yt_data_extract.requires_decryption(info):
return False
if not info['player_name']:
return 'Could not find player name'
player_name = info['player_name']
if player_name in decrypt_cache:
print('Using cached decryption function for: ' + player_name)
info['decryption_function'] = decrypt_cache[player_name]
else:
base_js = util.fetch_url(info['base_js'], debug_name='base.js', report_text='Fetched player ' + player_name)
base_js = base_js.decode('utf-8')
err = yt_data_extract.extract_decryption_function(info, base_js)
if err:
return err
decrypt_cache[player_name] = info['decryption_function']
save_decrypt_cache()
err = yt_data_extract.decrypt_signatures(info)
return err
def _add_to_error(info, key, additional_message):
if key in info and info[key]:
info[key] += additional_message
else:
info[key] = additional_message
def extract_info(video_id, use_invidious, playlist_id=None, index=None):
# bpctr=9999999999 will bypass are-you-sure dialogs for controversial
# videos
url = 'https://m.youtube.com/embed/' + video_id + '?bpctr=9999999999'
if playlist_id:
url += '&list=' + playlist_id
if index:
url += '&index=' + index
watch_page = util.fetch_url(url, headers=watch_headers,
debug_name='watch')
watch_page = watch_page.decode('utf-8')
info = yt_data_extract.extract_watch_info_from_html(watch_page)
# request player urls if it's missing
# see https://github.com/user234683/youtube-local/issues/22#issuecomment-706395160
if info['age_restricted'] or info['player_urls_missing']:
if info['age_restricted']:
print('Age restricted video. Fetching /youtubei/v1/player page')
else:
print('Missing player. Fetching /youtubei/v1/player page')
# https://github.com/yt-dlp/yt-dlp/issues/574#issuecomment-887171136
# ANDROID is used instead because its urls don't require decryption
# The URLs returned with WEB for videos requiring decryption
# couldn't be decrypted with the base.js from the web page for some
# reason
url ='https://youtubei.googleapis.com/youtubei/v1/player'
url += '?key=AIzaSyAO_FJ2SlqU8Q4STEHLGCilw_Y9_11qcW8'
data = {
'videoId': video_id,
'context': {
'client': {
'clientName': 'ANDROID',
'clientVersion': '16.20',
'clientScreen': 'EMBED',
'gl': 'US',
'hl': 'en',
},
# https://github.com/yt-dlp/yt-dlp/pull/575#issuecomment-887739287
'thirdParty': {
'embedUrl': 'https://google.com', # Can be any valid URL
}
}
}
data = json.dumps(data)
content_header = (('Content-Type', 'application/json'),)
player_response = util.fetch_url(
url, data=data, headers=util.mobile_ua + content_header,
debug_name='youtubei_player',
report_text='Fetched youtubei player page').decode('utf-8')
yt_data_extract.update_with_age_restricted_info(info,
player_response)
# signature decryption
decryption_error = decrypt_signatures(info, video_id)
if decryption_error:
decryption_error = 'Error decrypting url signatures: ' + decryption_error
info['playability_error'] = decryption_error
# check if urls ready (non-live format) in former livestream
# urls not ready if all of them have no filesize
if info['was_live']:
info['urls_ready'] = False
for fmt in info['formats']:
if fmt['file_size'] is not None:
info['urls_ready'] = True
else:
info['urls_ready'] = True
# livestream urls
# sometimes only the livestream urls work soon after the livestream is over
if (info['hls_manifest_url']
and (info['live'] or not info['formats'] or not info['urls_ready'])
):
manifest = util.fetch_url(
info['hls_manifest_url'],
debug_name='hls_manifest.m3u8',
report_text='Fetched hls manifest'
).decode('utf-8')
info['hls_formats'], err = yt_data_extract.extract_hls_formats(manifest)
if not err:
info['playability_error'] = None
for fmt in info['hls_formats']:
fmt['video_quality'] = video_quality_string(fmt)
else:
info['hls_formats'] = []
# check for 403. Unnecessary for tor video routing b/c ip address is same
info['invidious_used'] = False
info['invidious_reload_button'] = False
if (settings.route_tor == 1
and info['formats'] and info['formats'][0]['url']):
try:
response = util.head(info['formats'][0]['url'],
report_text='Checked for URL access')
except urllib3.exceptions.HTTPError:
print('Error while checking for URL access:\n')
traceback.print_exc()
return info
if response.status == 403:
print('Access denied (403) for video urls.')
print('Routing video through Tor')
for fmt in info['formats']:
fmt['url'] += '&use_tor=1'
elif 300 <= response.status < 400:
print('Error: exceeded max redirects while checking video URL')
return info
def video_quality_string(format):
if format['vcodec']:
result = str(format['width'] or '?') + 'x' + str(format['height'] or '?')
if format['fps']:
result += ' ' + str(format['fps']) + 'fps'
return result
elif format['acodec']:
return 'audio only'
return '?'
def short_video_quality_string(fmt):
result = str(fmt['quality'] or '?') + 'p'
if fmt['fps']:
result += ' ' + str(fmt['fps']) + 'fps'
return result
def audio_quality_string(fmt):
if fmt['acodec']:
if fmt['audio_bitrate']:
result = '%d' % fmt['audio_bitrate'] + 'k'
else:
result = '?k'
if fmt['audio_sample_rate']:
result += ' ' + '%.3G' % (fmt['audio_sample_rate']/1000) + 'kHz'
return result
elif fmt['vcodec']:
return 'video only'
return '?'
# from https://github.com/ytdl-org/youtube-dl/blob/master/youtube_dl/utils.py
def format_bytes(bytes):
if bytes is None:
return 'N/A'
if type(bytes) is str:
bytes = float(bytes)
if bytes == 0.0:
exponent = 0
else:
exponent = int(math.log(bytes, 1024.0))
suffix = ['B', 'KiB', 'MiB', 'GiB', 'TiB', 'PiB', 'EiB', 'ZiB', 'YiB'][exponent]
converted = float(bytes) / float(1024 ** exponent)
return '%.2f%s' % (converted, suffix)
time_table = {'h': 3600, 'm': 60, 's': 1}
@yt_app.route('/watch')
@yt_app.route('/embed')
@yt_app.route('/embed/<video_id>')
def get_watch_page(video_id=None):
video_id = request.args.get('v') or video_id
if not video_id:
return flask.render_template('error.html', error_message='Missing video id'), 404
if len(video_id) < 11:
return flask.render_template('error.html', error_message='Incomplete video id (too short): ' + video_id), 404
time_start_str = request.args.get('t', '0s')
time_start = 0
if re.fullmatch(r'(\d+(h|m|s))+', time_start_str):
for match in re.finditer(r'(\d+)(h|m|s)', time_start_str):
time_start += int(match.group(1))*time_table[match.group(2)]
elif re.fullmatch(r'\d+', time_start_str):
time_start = int(time_start_str)
lc = request.args.get('lc', '')
playlist_id = request.args.get('list')
index = request.args.get('index')
use_invidious = bool(int(request.args.get('use_invidious', '1')))
if request.path.startswith('/embed') and settings.embed_page_mode:
tasks = (
gevent.spawn((lambda: {})),
gevent.spawn(extract_info, video_id, use_invidious,
playlist_id=playlist_id, index=index),
)
else:
tasks = (
gevent.spawn(comments.video_comments, video_id,
int(settings.default_comment_sorting), lc=lc),
gevent.spawn(extract_info, video_id, use_invidious,
playlist_id=playlist_id, index=index),
)
gevent.joinall(tasks)
util.check_gevent_exceptions(tasks[1])
comments_info, info = tasks[0].value, tasks[1].value
if info['error']:
return flask.render_template('error.html', error_message=info['error'])
video_info = {
'duration': util.seconds_to_timestamp(info['duration'] or 0),
'id': info['id'],
'title': info['title'],
'author': info['author'],
'author_id': info['author_id'],
}
# prefix urls, and other post-processing not handled by yt_data_extract
for item in info['related_videos']:
util.prefix_urls(item)
util.add_extra_html_info(item)
if info['playlist']:
playlist_id = info['playlist']['id']
for item in info['playlist']['items']:
util.prefix_urls(item)
util.add_extra_html_info(item)
if playlist_id:
item['url'] += '&list=' + playlist_id
if item['index']:
item['url'] += '&index=' + str(item['index'])
info['playlist']['author_url'] = util.prefix_url(
info['playlist']['author_url'])
if settings.img_prefix:
# Don't prefix hls_formats for now because the urls inside the manifest
# would need to be prefixed as well.
for fmt in info['formats']:
fmt['url'] = util.prefix_url(fmt['url'])
# Add video title to end of url path so it has a filename other than just
# "videoplayback" when downloaded
title = urllib.parse.quote(util.to_valid_filename(info['title'] or ''))
for fmt in info['formats']:
filename = title
ext = fmt.get('ext')
if ext:
filename += '.' + ext
fmt['url'] = fmt['url'].replace(
'/videoplayback',
'/videoplayback/name/' + filename)
if settings.gather_googlevideo_domains:
with open(os.path.join(settings.data_dir, 'googlevideo-domains.txt'), 'a+', encoding='utf-8') as f:
url = info['formats'][0]['url']
subdomain = url[0:url.find(".googlevideo.com")]
f.write(subdomain + "\n")
download_formats = []
for format in (info['formats'] + info['hls_formats']):
if format['acodec'] and format['vcodec']:
codecs_string = format['acodec'] + ', ' + format['vcodec']
else:
codecs_string = format['acodec'] or format['vcodec'] or '?'
download_formats.append({
'url': format['url'],
'ext': format['ext'] or '?',
'audio_quality': audio_quality_string(format),
'video_quality': video_quality_string(format),
'file_size': format_bytes(format['file_size']),
'codecs': codecs_string,
})
target_resolution = settings.default_resolution
source_info = get_video_sources(info, target_resolution)
uni_sources = source_info['uni_sources']
pair_sources = source_info['pair_sources']
uni_idx, pair_idx = source_info['uni_idx'], source_info['pair_idx']
video_height = yt_data_extract.deep_get(source_info, 'uni_sources',
uni_idx, 'height',
default=360)
video_width = yt_data_extract.deep_get(source_info, 'uni_sources',
uni_idx, 'width',
default=640)
pair_quality = yt_data_extract.deep_get(pair_sources, pair_idx, 0,
'quality')
uni_quality = yt_data_extract.deep_get(uni_sources, uni_idx, 'quality')
pair_error = abs((pair_quality or 360) - target_resolution)
uni_error = abs((uni_quality or 360) - target_resolution)
if uni_error == pair_error:
# use settings.prefer_uni_sources as a tiebreaker
closer_to_target = 'uni' if settings.prefer_uni_sources else 'pair'
elif uni_error < pair_error:
closer_to_target = 'uni'
else:
closer_to_target = 'pair'
using_pair_sources = (
bool(pair_sources) and (not uni_sources or closer_to_target == 'pair')
)
# 1 second per pixel, or the actual video width
theater_video_target_width = max(640, info['duration'] or 0, video_width)
# Check for false determination of disabled comments, which comes from
# the watch page. But if we got comments in the separate request for those,
# then the determination is wrong.
if info['comments_disabled'] and comments_info.get('comments'):
info['comments_disabled'] = False
print('Warning: False determination that comments are disabled')
print('Comment count:', info['comment_count'])
info['comment_count'] = None # hack to make it obvious there's a bug
# captions and transcript
subtitle_sources = get_subtitle_sources(info)
other_downloads = []
for source in subtitle_sources:
best_caption_parse = urllib.parse.urlparse(
source['url'].lstrip('/'))
transcript_url = (util.URL_ORIGIN
+ '/watch/transcript'
+ best_caption_parse.path
+ '?' + best_caption_parse.query)
other_downloads.append({
'label': 'Video Transcript: ' + source['label'],
'ext': 'txt',
'url': transcript_url
})
if request.path.startswith('/embed') and settings.embed_page_mode:
template_name = 'embed.html'
else:
template_name = 'watch.html'
return flask.render_template(
template_name,
header_playlist_names = local_playlist.get_playlist_names(),
uploader_channel_url = ('/' + info['author_url']) if info['author_url'] else '',
time_published = info['time_published'],
time_published_utc=time_utc_isoformat(info['time_published']),
view_count = (lambda x: '{:,}'.format(x) if x is not None else "")(info.get("view_count", None)),
like_count = (lambda x: '{:,}'.format(x) if x is not None else "")(info.get("like_count", None)),
dislike_count = (lambda x: '{:,}'.format(x) if x is not None else "")(info.get("dislike_count", None)),
download_formats = download_formats,
other_downloads = other_downloads,
video_info = json.dumps(video_info),
hls_formats = info['hls_formats'],
subtitle_sources = subtitle_sources,
related = info['related_videos'],
playlist = info['playlist'],
music_list = info['music_list'],
music_attributes = get_ordered_music_list_attributes(info['music_list']),
comments_info = comments_info,
comment_count = info['comment_count'],
comments_disabled = info['comments_disabled'],
video_height = video_height,
video_width = video_width,
theater_video_target_width = theater_video_target_width,
title = info['title'],
uploader = info['author'],
description = info['description'],
unlisted = info['unlisted'],
limited_state = info['limited_state'],
age_restricted = info['age_restricted'],
live = info['live'],
playability_error = info['playability_error'],
allowed_countries = info['allowed_countries'],
ip_address = info['ip_address'] if settings.route_tor else None,
invidious_used = info['invidious_used'],
invidious_reload_button = info['invidious_reload_button'],
video_url = util.URL_ORIGIN + '/watch?v=' + video_id,
video_id = video_id,
js_data = {
'video_id': info['id'],
'video_duration': info['duration'],
'settings': settings.current_settings_dict,
'has_manual_captions': any(s.get('on') for s in subtitle_sources),
**source_info,
'using_pair_sources': using_pair_sources,
'time_start': time_start,
'playlist': info['playlist'],
'related': info['related_videos'],
'playability_error': info['playability_error'],
},
font_family=youtube.font_choices[settings.font],
**source_info,
using_pair_sources = using_pair_sources,
)
@yt_app.route('/api/<path:dummy>')
def get_captions(dummy):
result = util.fetch_url('https://www.youtube.com' + request.full_path)
result = result.replace(b"align:start position:0%", b"")
return result
times_reg = re.compile(r'^\d\d:\d\d:\d\d\.\d\d\d --> \d\d:\d\d:\d\d\.\d\d\d.*$')
inner_timestamp_removal_reg = re.compile(r'<[^>]+>')
@yt_app.route('/watch/transcript/<path:caption_path>')
def get_transcript(caption_path):
try:
captions = util.fetch_url('https://www.youtube.com/'
+ caption_path
+ '?' + request.environ['QUERY_STRING']).decode('utf-8')
except util.FetchError as e:
msg = ('Error retrieving captions: ' + str(e) + '\n\n'
+ 'The caption url may have expired.')
print(msg)
return flask.Response(
msg,
status=e.code,
mimetype='text/plain;charset=UTF-8')
lines = captions.splitlines()
segments = []
# skip captions file header
i = 0
while lines[i] != '':
i += 1
current_segment = None
while i < len(lines):
line = lines[i]
if line == '':
if ((current_segment is not None)
and (current_segment['begin'] is not None)):
segments.append(current_segment)
current_segment = {
'begin': None,
'end': None,
'lines': [],
}
elif times_reg.fullmatch(line.rstrip()):
current_segment['begin'], current_segment['end'] = line.split(' --> ')
else:
current_segment['lines'].append(
inner_timestamp_removal_reg.sub('', line))
i += 1
# if automatic captions, but not translated
if request.args.get('kind') == 'asr' and not request.args.get('tlang'):
# Automatic captions repeat content. The new segment is displayed
# on the bottom row; the old one is displayed on the top row.
# So grab the bottom row only
for seg in segments:
seg['text'] = seg['lines'][1]
else:
for seg in segments:
seg['text'] = ' '.join(map(str.rstrip, seg['lines']))
result = ''
for seg in segments:
if seg['text'] != ' ':
result += seg['begin'] + ' ' + seg['text'] + '\r\n'
return flask.Response(result.encode('utf-8'),
mimetype='text/plain;charset=UTF-8')
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