diff --git a/ox/api.py b/ox/api.py
index 159aec7..51742c2 100644
--- a/ox/api.py
+++ b/ox/api.py
@@ -201,7 +201,7 @@ class API(object):
                         return False
                     if data['status']['code'] != 200:
                         print("request returned error, will try again in 5 seconds")
-                        if self.DEBUG:
+                        if DEBUG:
                             print(data)
                         time.sleep(5)
                 if data and data.get('result') == 1:
diff --git a/ox/cache.py b/ox/cache.py
index b5f9a9e..904f31d 100644
--- a/ox/cache.py
+++ b/ox/cache.py
@@ -16,7 +16,6 @@ from six import PY2
 try:
     import requests
     USE_REQUESTS = True
-    requests_session = requests.Session()
 except:
     USE_REQUESTS = False
 
@@ -102,7 +101,7 @@ def read_url(url, data=None, headers=None, timeout=cache_timeout, valid=None, un
     url_headers = {}
     if not result:
         if USE_REQUESTS:
-            r = requests_session.get(url, headers=headers)
+            r = requests.get(url, headers=headers)
             for key in r.headers:
                 url_headers[key.lower()] = r.headers[key]
             result = r.content
diff --git a/ox/file.py b/ox/file.py
index ec9da4b..ab789a3 100644
--- a/ox/file.py
+++ b/ox/file.py
@@ -159,9 +159,50 @@ def avinfo(filename, cached=True):
     if os.path.getsize(filename):
         if find_executable('ffprobe'):
             return ffprobe(filename)
-        raise EnvironmentError('could to find ffprobe. please install ffmpeg')
-    return {'path': filename, 'size': 0}
+        ffmpeg2theora = cmd('ffmpeg2theora')
+        p = subprocess.Popen([ffmpeg2theora], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+        stdout, error = p.communicate()
+        stdout = stdout.decode('utf-8')
+        version = stdout.split('\n')[0].split(' - ')[0].split(' ')[-1]
+        if version < '0.27':
+            raise EnvironmentError('version of ffmpeg2theora needs to be 0.27 or later, found %s' % version)
+        p = subprocess.Popen([ffmpeg2theora, '--info', filename],
+                             stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+        stdout, error = p.communicate()
+        stdout = stdout.decode('utf-8')
+        try:
+            info = json.loads(stdout)
+        except:
+            # remove metadata, can be broken
+            reg = re.compile('"metadata": {.*?},', re.DOTALL)
+            stdout = re.sub(reg, '', stdout)
+            info = json.loads(stdout)
+        if 'video' in info:
+            for v in info['video']:
+                if 'display_aspect_ratio' not in v and 'width' in v:
+                    v['display_aspect_ratio'] = '%d:%d' % (v['width'], v['height'])
+                    v['pixel_aspect_ratio'] = '1:1'
+        if len(info.get('audio', [])) > 1:
+            if 'metadata' in info['audio'][0]:
+                for stream in info['audio']:
+                    language = stream.get('metadata', {}).get('language')
+                    if language and language != 'und':
+                        stream['language'] = language[0]
+            else:
+                ffmpeg = cmd('ffmpeg')
+                p = subprocess.Popen([ffmpeg, '-i', filename], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+                stdout, stderr = p.communicate()
+                stderr = stderr.decode('utf-8')
+                languages = [re.compile('\((.+?)\):').findall(l) for l in stderr.split('\n') if 'Stream' in l and 'Audio' in l]
+                if len(languages) == len(info['audio']):
+                    for i, stream in enumerate(info['audio']):
+                        language = languages[i]
+                        if language and language[0] != 'und':
+                            stream['language'] = language[0]
+        fix_coverart(info)
+        return info
 
+    return {'path': filename, 'size': 0}
 
 def ffprobe(filename):
     p = subprocess.Popen([
@@ -252,22 +293,6 @@ def ffprobe(filename):
                             'sample_aspect_ratio': 'pixel_aspect_ratio',
                         }.get(key, key)] = fix_value(key, s[key])
                 info[s['codec_type']].append(stream)
-            elif s.get('codec_type') == 'subtitle':
-                info['subtitles'] = info.get('subtitles', [])
-                stream = {}
-                if language and language != 'und':
-                    stream['language'] = language
-                for key in (
-                    'codec_name',
-                    'language',
-                    'width',
-                    'height',
-                ):
-                    if key in s:
-                        stream[{
-                            'codec_name': 'codec',
-                        }.get(key, key)] = s[key]
-                info['subtitles'].append(stream)
             else:
                 pass
                 # print s
diff --git a/ox/net.py b/ox/net.py
index 59e6abe..2a5e71b 100644
--- a/ox/net.py
+++ b/ox/net.py
@@ -21,7 +21,7 @@ from chardet.universaldetector import UniversalDetector
 DEBUG = False
 # Default headers for HTTP requests.
 DEFAULT_HEADERS = {
-    'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64; rv:69.0) Gecko/20100101 Firefox/69.0',
+    'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64; rv:55.0) Gecko/20100101 Firefox/55.0',
     'Accept-Charset': 'ISO-8859-1,utf-8;q=0.7,*;q=0.7',
     'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
     'Accept-Language': 'en-US,en;q=0.8,fr;q=0.6,de;q=0.4',
diff --git a/ox/srt.py b/ox/srt.py
index c29ae8b..5191a55 100644
--- a/ox/srt.py
+++ b/ox/srt.py
@@ -63,6 +63,10 @@ def load(filename, offset=0):
     Returns list with dicts that have in, out, value and id
     '''
     srt = []
+
+    def parse_time(t):
+        return offset + ox.time2ms(t.replace(',', '.')) / 1000
+
     with open(filename, 'rb') as f:
         encoding = _detect_encoding(f)
         data = f.read()
@@ -73,21 +77,7 @@ def load(filename, offset=0):
             data = data.decode('latin-1')
         except:
             print("failed to detect encoding, giving up")
-            return []
-    return loads(data, offset)
-
-def loads(data, offset=0):
-    '''Parses an srt file
-
-    filename: path to an srt file
-    offset (float, seconds): shift all in/out points by offset
-
-    Returns list with dicts that have in, out, value and id
-    '''
-    srt = []
-
-    def parse_time(t):
-        return offset + ox.time2ms(t.replace(',', '.')) / 1000
+            return srt
 
     data = data.replace('\r\n', '\n')
     if not data.endswith('\n\n'):
diff --git a/ox/web/imdb.py b/ox/web/imdb.py
index fb109be..4821b0c 100644
--- a/ox/web/imdb.py
+++ b/ox/web/imdb.py
@@ -23,8 +23,6 @@ def prepare_url(url, data=None, headers=cache.DEFAULT_HEADERS, timeout=cache.cac
     headers = headers.copy()
     # https://webapps.stackexchange.com/questions/11003/how-can-i-disable-reconfigure-imdbs-automatic-geo-location-so-it-does-not-defau
     headers['X-Forwarded-For'] = '72.21.206.80'
-    headers['Accept-Language'] = 'en'
-
     return url, data, headers, timeout, unicode
 
 def read_url(url, data=None, headers=cache.DEFAULT_HEADERS, timeout=cache.cache_timeout, valid=None, unicode=False):
@@ -36,7 +34,7 @@ def delete_url(url, data=None, headers=cache.DEFAULT_HEADERS):
     cache.store.delete(url, data, headers)
 
 def get_url(id):
-    return "http://akas.imdb.com/title/tt%s/" % id
+    return "http://www.imdb.com/title/tt%s/" % id
 
 
 def reference_section(id):
@@ -126,8 +124,8 @@ class Imdb(SiteParser):
         'alternativeTitles': {
             'page': 'releaseinfo',
             're': [
-                '<h4[^>]*?id="akas"[^>]*?>(.*?)</table>',
-                "td[^>]*?>(.*?)</td>.*?<td[^>]*?>(.*?)</td>"
+                '<table[^>]*?id="akas"[^>]*?>(.*?)</table>',
+                "td>(.*?)</td>.*?<td>(.*?)</td>"
             ],
             'type': 'list'
         },
@@ -201,11 +199,6 @@ class Imdb(SiteParser):
         'summary': zebra_table('Plot Summary', more=[
             '<p>(.*?)<em'
         ]),
-        'storyline': {
-            'page': '',
-            're': '<h2>Storyline</h2>.*?<p>(.*?)</p>',
-            'type': 'string'
-        },
         'posterId': {
             'page': 'reference',
             're': '<img.*?class="titlereference-primary-image".*?src="(.*?)".*?>',
@@ -274,7 +267,7 @@ class Imdb(SiteParser):
         },
         'series': {
             'page': 'reference',
-            're': '<h4 itemprop="name">.*?<a href="/title/tt(\d+)',
+            're': '<h4 itemprop="name">.*?<a href="/title/tt(\d{7})',
             'type': 'string'
         },
         'isSeries': {
@@ -379,9 +372,6 @@ class Imdb(SiteParser):
 
         if 'alternativeTitles' in self:
             alt = {}
-            for t in self['alternativeTitles']:
-                if t[0].strip() in ('World-wide (English title)', ):
-                    self['title'] = cleanup_title(t[1])
             for t in self['alternativeTitles']:
                 title = cleanup_title(t[1])
                 if title.lower() not in (self.get('title', '').lower(), self.get('originalTitle', '').lower()):
@@ -432,7 +422,7 @@ class Imdb(SiteParser):
             for rel, data, _ in self['connections']:
                 if isinstance(rel, bytes):
                     rel = rel.decode('utf-8')
-                #cc[rel] = re.compile('<a href="/title/tt(\d+)/">(.*?)</a>').findall(data)
+                #cc[rel] = re.compile('<a href="/title/tt(\d{7})/">(.*?)</a>').findall(data)
                 def get_conn(c):
                     r = {
                         'id': c[0],
@@ -442,7 +432,7 @@ class Imdb(SiteParser):
                     if len(description) == 2 and description[-1].strip() != '-':
                         r['description'] = description[-1].strip()
                     return r
-                cc[rel] = list(map(get_conn, re.compile('<a href="/title/tt(\d+)/?">(.*?)</a>(.*?)<\/div', re.DOTALL).findall(data)))
+                cc[rel] = list(map(get_conn, re.compile('<a href="/title/tt(\d{7})/?">(.*?)</a>(.*?)<\/div', re.DOTALL).findall(data)))
 
             self['connections'] = cc
 
@@ -527,13 +517,10 @@ class Imdb(SiteParser):
             ])
             if self['releasedate'] == 'x':
                 del self['releasedate']
-
-        if 'summary' not in self and 'storyline' in self:
-            self['summary'] = self.pop('storyline')
         if 'summary' in self:
             if isinstance(self['summary'], list):
                 self['summary'] = self['summary'][0]
-            self['summary'] = strip_tags(self['summary'].split('</p')[0]).split('  Written by\n')[0].strip()
+            self['summary'] = self['summary'].split('</p')[0].strip()
 
         if 'credits' in self:
             credits = [
@@ -631,7 +618,7 @@ def get_movie_by_title(title, timeout=-1):
     url = "http://akas.imdb.com/find?" + params
     data = read_url(url, timeout=timeout, unicode=True)
     #if search results in redirect, get id of current page
-    r = '<meta property="og:url" content="http://www.imdb.com/title/tt(\d+)/" />'
+    r = '<meta property="og:url" content="http://www.imdb.com/title/tt(\d{7})/" />'
     results = re.compile(r).findall(data)    
     if results:
         return results[0]
@@ -710,12 +697,12 @@ def get_movie_id(title, director='', year='', timeout=-1):
 
     data = read_url(url, timeout=timeout, unicode=True)
     #if search results in redirect, get id of current page
-    r = '<meta property="og:url" content="http://www.imdb.com/title/tt(\d+)/" />'
+    r = '<meta property="og:url" content="http://www.imdb.com/title/tt(\d{7})/" />'
     results = re.compile(r).findall(data)    
     if results:
         return results[0]
     #otherwise get first result
-    r = '<td valign="top">.*?<a href="/title/tt(\d+)/"'
+    r = '<td valign="top">.*?<a href="/title/tt(\d{7})/"'
     results = re.compile(r).findall(data)
     if results:
         return results[0]
@@ -726,7 +713,7 @@ def get_movie_id(title, director='', year='', timeout=-1):
     results = duckduckgo.find(google_query, timeout=timeout)
     if results:
         for r in results[:2]:
-            imdbId = find_re(r[1], 'title/tt(\d+)')
+            imdbId = find_re(r[1], 'title/tt(\d{7})')
             if imdbId:
                 return imdbId
     #or nothing
@@ -753,7 +740,7 @@ def get_episodes(imdbId, season=None):
     if season:
         url += '?season=%d' % season
         data = cache.read_url(url).decode()
-        for e in re.compile('<div data-const="tt(\d+)".*?>.*?<div>S(\d+), Ep(\d+)<\/div>\n<\/div>', re.DOTALL).findall(data):
+        for e in re.compile('<div data-const="tt(\d{7})".*?>.*?<div>S(\d+), Ep(\d+)<\/div>\n<\/div>', re.DOTALL).findall(data):
             episodes['S%02dE%02d' % (int(e[1]), int(e[2]))] = e[0]
     else:
         data = cache.read_url(url)
diff --git a/ox/web/piratecinema.py b/ox/web/piratecinema.py
index c452f04..4ed946b 100644
--- a/ox/web/piratecinema.py
+++ b/ox/web/piratecinema.py
@@ -8,7 +8,7 @@ from ox.net import read_url
 def get_poster_url(id):
     url = 'http://piratecinema.org/posters/'
     html = read_url(url).decode('utf-8')
-    results = re.compile('src="(.+)" title=".+\((\d{6}\d+)\)"').findall(html)
+    results = re.compile('src="(.+)" title=".+\((\d{7})\)"').findall(html)
     for result in results:
         if result[1] == id:
             return url + result[0]
diff --git a/ox/web/siteparser.py b/ox/web/siteparser.py
index 8c212bf..61a79bd 100644
--- a/ox/web/siteparser.py
+++ b/ox/web/siteparser.py
@@ -1,7 +1,6 @@
 # -*- coding: utf-8 -*-
 # vi:si:et:sw=4:sts=4:ts=4
 import re
-from multiprocessing.pool import ThreadPool
 
 from six import string_types
 
@@ -29,7 +28,6 @@ def cleanup(key, data, data_type):
 class SiteParser(dict):
     baseUrl = ''
     regex = {}
-    pool = ThreadPool(8)
 
     def get_url(self, page):
         return "%s%s" % (self.baseUrl, page)
@@ -41,9 +39,6 @@ class SiteParser(dict):
 
     def __init__(self, timeout=-1):
         self._cache = {}
-        urls = list(set(self.get_url(self.regex[key]['page']) for key in self.regex))
-        self.pool.map(self.get_url, urls)
-
         for key in self.regex:
             url = self.get_url(self.regex[key]['page'])
             data = self.read_url(url, timeout)
diff --git a/ox/web/wikipedia.py b/ox/web/wikipedia.py
index de8b064..cb73758 100644
--- a/ox/web/wikipedia.py
+++ b/ox/web/wikipedia.py
@@ -17,7 +17,7 @@ def get_id(url):
 
 def get_url(id=None, imdb=None, allmovie=None):
     if imdb:
-        query = '"%s"' % imdb
+        query = '"%s"'% imdb
         result = find(query)
         if result:
             url = result[0][1]
@@ -26,7 +26,7 @@ def get_url(id=None, imdb=None, allmovie=None):
                 return url
         return ""
     if allmovie:
-        query = '"amg_id = 1:%s"' % allmovie
+        query = '"amg_id = 1:%s"'% allmovie
         result = find(query)
         if result:
             url = result[0][1]
@@ -140,7 +140,7 @@ def get_allmovie_id(wikipedia_url):
     return data.get('amg_id', '')
 
 def find(query, max_results=10):
-    query = {'action': 'query', 'list': 'search', 'format': 'json',
+    query = {'action': 'query', 'list':'search', 'format': 'json',
              'srlimit': max_results, 'srwhat': 'text', 'srsearch': query.encode('utf-8')}
     url = "http://en.wikipedia.org/w/api.php?" + urllib.parse.urlencode(query)
     data = read_url(url)
diff --git a/requirements.txt b/requirements.txt
index 51c3f99..b7509ec 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,2 @@
 chardet
 six>=1.5.2
-lxml