# -*- coding: utf-8 -*- # vi:si:et:sw=4:sts=4:ts=4 from __future__ import division, with_statement from datetime import datetime import os.path import subprocess from glob import glob import uuid import unicodedata from django.db import models from django.db.models import Sum from django.core.files.base import ContentFile from django.utils import simplejson as json from django.conf import settings from django.contrib.auth.models import User, Group import ox from ox.django import fields from ox.normalize import canonicalTitle import ox.web.imdb import managers import utils import tasks from archive import extract from annotation.models import Annotation, Layer from person.models import get_name_sort from app.models import site_config def get_item(info, user=None): ''' info dict with: imdbId, title, director, episode_title, season, series ''' if settings.USE_IMDB: if 'imdbId' in info and info['imdbId']: try: item = Item.objects.get(itemId=info['imdbId']) except Item.DoesNotExist: item = Item(itemId=info['imdbId']) if 'title' in info and 'director' in info: item.external_data = { 'title': info['title'], 'director': info['director'], 'year': info.get('year', '') } item.user = user item.save() tasks.update_external.delay(item.itemId) else: q = Item.objects.filter(find__key='title', find__value=info['title']) if q.count() > 1: print "FIXME: check more than title here!!?" item = q[0] else: try: item = Item.objects.get(itemId=info['oxdbId']) except Item.DoesNotExist: item = Item() item.data = { 'title': info['title'], 'director': info['director'], 'year': info.get('year', '') } item.itemId = info['oxdbId'] for key in ('episode_title', 'series_title', 'season', 'episode'): if key in info and info[key]: item.data[key] = info[key] try: existing_item = Item.objects.get(oxdbId=item.oxdb_id()) item = existing_item except Item.DoesNotExist: item.save() else: qs = Item.objects.filter(find__key='title', find__value=info['title']) if qs.count() == 1: item = qs[0] else: item = Item() item.data = { 'title': info['title'] } item.user = user item.save() return item class Item(models.Model): created = models.DateTimeField(auto_now_add=True) modified = models.DateTimeField(auto_now=True) published = models.DateTimeField(default=datetime.now, editable=False) user = models.ForeignKey(User, null=True, related_name='items') groups = models.ManyToManyField(Group, related_name='items') #only items that have data from files are available, #this is indicated by setting available to True available = models.BooleanField(default=False, db_index=True) public = models.BooleanField(default=False, db_index=True) itemId = models.CharField(max_length=128, unique=True, blank=True) oxdbId = models.CharField(max_length=42, unique=True, blank=True) external_data = fields.DictField(default={}, editable=False) data = fields.DictField(default={}, editable=False) json = fields.DictField(default={}, editable=False) poster = models.ImageField(default=None, blank=True, upload_to=lambda i, x: i.path("poster.jpg")) poster_url = models.TextField(blank=True) poster_height = models.IntegerField(default=0) poster_width = models.IntegerField(default=0) poster_frame = models.FloatField(default=-1) icon = models.ImageField(default=None, blank=True, upload_to=lambda i, x: i.path("icon.jpg")) #stream related fields stream_aspect = models.FloatField(default=4/3) objects = managers.ItemManager() def get(self, key, default=None): if self.data and key in self.data: return self.data[key] if self.external_data and key in self.external_data: return self.external_data[key] return default def access(self, user): if self.public and self.available: return True elif user.is_authenticated() and \ (user.is_staff or self.user == user or \ self.groups.filter(id__in=user.groups.all()).count() > 0): return True return False def editable(self, user): if user.is_staff or \ self.user == user or \ self.groups.filter(id__in=user.groups.all()).count() > 0: return True return False def edit(self, data): #FIXME: how to map the keys to the right place to write them to? if 'id' in data: #FIXME: check if id is valid and exists and move/merge items accordingly del data['id'] if 'id' in data: groups = data.pop('groups') self.groups.exclude(name__in=groups).delete() for g in groups: group, created = Group.objects.get_or_create(name=g) self.groups.add(group) for key in data: if key != 'id': setattr(self.data, key, data[key]) self.data.save() self.save() def reviews(self): reviews = self.get('reviews', []) _reviews = {} for r in reviews: for url in settings.REVIEW_WHITELIST: if url in r[0]: _reviews[settings.REVIEW_WHITELIST[url]] = r[0] return _reviews def update_external(self): if len(self.itemId) == 7: data = ox.web.imdb.Imdb(self.itemId) #FIXME: all this should be in ox.web.imdb.Imdb for key in ('directors', 'writers', 'editors', 'producers', 'cinematographers', 'languages', 'genres', 'keywords', 'episode_directors'): if key in data: data[key[:-1]] = data.pop(key) if 'countries' in data: data['country'] = data.pop('countries') if 'release date' in data: data['releasedate'] = data.pop('release date') if isinstance(data['releasedate'], list): data['releasedate'] = min(data['releasedate']) if 'plot' in data: data['summary'] = data.pop('plot') if 'cast' in data: if isinstance(data['cast'][0], basestring): data['actor'] = [data['cast'][0]] else: data['actor'] = [c[0] for c in data['cast']] self.external_data = data self.save() def __unicode__(self): year = self.get('year') if year: return u'%s (%s)' % (self.get('title', 'Untitled'), self.get('year')) return self.get('title', u'Untitled') def get_absolute_url(self): return '/%s' % self.itemId def save(self, *args, **kwargs): if not self.id: if not self.itemId: self.itemId = str(uuid.uuid1()) super(Item, self).save(*args, **kwargs) if not settings.USE_IMDB: self.itemId = ox.to32(self.id) self.oxdbId = self.oxdb_id() if self.poster: self.poster_height = self.poster.height self.poster_width = self.poster.width else: self.poster_height = 128 self.poster_width = 80 self.update_find() self.update_sort() self.update_facets() self.json = self.get_json() super(Item, self).save(*args, **kwargs) def delete(self, *args, **kwargs): self.delete_poster() for f in glob("%s*"%self.timeline_prefix): os.unlink(f) for f in glob("%sstrip*"%self.timeline_prefix[:-8]): os.unlink(f) super(Item, self).delete(*args, **kwargs) def merge_with(self, other): ''' move all related tables to other and delete self ''' for stream in self.streams.all(): stream.item = other stream.save() for l in self.lists.all(): l.items.remove(self) if l.items.filter(id=other.id) == 0: l.items.add(other) #FIXME: should this really happen for annotations? for a in self.annotations.all(): a.item = other if hasattr(self, 'files'): for f in self.files.all(): f.item = other f.save() self.delete() other.save() ''' JSON cache related functions ''' #FIXME: this should not be used _public_fields = { 'itemId': 'id', 'title': 'title', 'year': 'year', 'runtime': 'runtime', 'releasedate': 'releasedate', 'country': 'country', 'director': 'director', 'writer': 'writer', 'editor': 'editor', 'producer': 'producer', 'cinematographer': 'cinematographer', 'language': 'language', 'genre': 'genre', 'keyword': 'keyword', 'cast': 'cast', 'series_title': 'series_title', 'episode_title': 'episode_title', 'season': 'season', 'episode': 'episode', 'reviews': 'reviews', 'trivia': 'trivia', 'rating': 'rating', 'votes': 'votes', 'alternative_titles': 'alternative_titles', 'connections_json': 'connections', } def get_poster(self): poster = {} poster['width'] = self.poster_width poster['height'] = self.poster_height poster['url'] = '/%s/poster.jpg' % self.itemId ''' if self.poster: poster['url'] = self.poster.url else: poster['url'] = self.poster_url ''' return poster def get_posters(self): posters = {} for p in self.poster_urls.all(): if p.service not in posters: posters[p.service] = [] posters[p.service].append({'url': p.url, 'width': p.width, 'height': p.height}) local_posters = self.local_posters().keys() if local_posters: posters['local'] = [] for p in local_posters: #FIXME: media_url is no longer public url = p.replace(settings.MEDIA_ROOT, settings.MEDIA_URL) width = 640 height = 1024 posters['local'].append({'url': url, 'width': width, 'height': height}) return posters def get_stream(self): stream = {} if self.streams.all().count(): s = self.streams.all()[0] if s.video and s.info: stream['duration'] = s.info['duration'] if 'video' in s.info and s.info['video']: stream['aspectRatio'] = s.info['video'][0]['width'] / s.info['video'][0]['height'] if settings.XSENDFILE or settings.XACCELREDIRECT: stream['baseUrl'] = '/%s' % self.itemId else: stream['baseUrl'] = os.path.dirname(s.video.url) stream['profiles'] = list(set(map(lambda s: int(os.path.splitext(s['profile'])[0][:-1]), self.streams.all().values('profile')))) stream['formats'] = list(set(map(lambda s: os.path.splitext(s['profile'])[1][1:], self.streams.all().values('profile')))) return stream def get_layers(self, user=None): layers = {} layers['subtitles'] = [] #FIXME: should subtitles be stored in Annotation? qs = self.files.filter(is_subtitle=True, is_main=True, available=True) if qs.count()>0: layers['subtitles'] = qs[0].srt() for l in Layer.objects.all(): ll = layers.setdefault(l.name, []) qs = Annotation.objects.filter(layer=l, item=self) if l.private: if user.is_anonymous(): user = None qs = qs.filter(user=user) for a in qs.order_by('start'): ll.append(a.json()) return layers def get_json(self, fields=None): i = { 'id': self.itemId } i.update(self.external_data) i.update(self.data) for k in site_config()['itemKeys']: key = k['id'] if key not in i: value = self.get(key) #also get values from sort table, i.e. numberof values if not value and self.sort and hasattr(self.sort, key): value = getattr(self.sort, key) if value: i[key] = value #format datetime values for key in i: if isinstance(i[key], datetime): i[key] = i[key].strftime('%Y-%m-%dT%H:%M:%SZ') i['poster'] = self.get_poster() i['posters'] = self.get_posters() return i def oxdb_id(self): if not settings.USE_IMDB: return self.itemId if not self.get('title', None) and not self.get('director', None): return None return utils.oxdb_id(self.get('title', ''), self.get('director', []), str(self.get('year', '')), self.get('season', ''), self.get('episode', ''), self.get('episode_title', ''), self.get('episode_director', []), self.get('episode_year', '')) ''' Search related functions ''' def update_find(self): def save(key, value): f, created = ItemFind.objects.get_or_create(item=self, key=key) if value not in ('', ): if isinstance(value, basestring): value = value.strip() f.value = value f.save() else: f.delete() #FIXME: use site_config save('title', u'\n'.join([self.get('title', 'Untitled'), self.get('original_title', '')])) for key in self.facet_keys: if key == 'character': values = self.get('cast', '') if values: if isinstance(values[0], basestring): values = [values[0], ] else: values = [i[1] for i in values] else: values = self.get(key, '') if isinstance(values, list): save(key, '\n'.join(values)) else: save(key, values) save('summary', self.get('summary', '')) save('trivia', ' '.join(self.get('trivia', []))) #FIXME: qs = Annotation.objects.filter(layer__type='subtitle', item=self).order_by('start') save('dialog', '\n'.join([l.value for l in qs])) def update_sort(self): try: s = self.sort except ItemSort.DoesNotExist: s = ItemSort(item=self) def sortNames(values): sort_value = u'' if values: sort_value = u'; '.join([get_name_sort(name) for name in values]) if not sort_value: sort_value = u'' return sort_value def set_value(s, name, value): if not value: value = None setattr(s, name, value) base_keys = ( 'id', 'aspectratio', 'duration', 'hue', 'saturation', 'lightness', 'volume', 'clips', 'cuts', 'cutsperminute', 'words', 'wordsperminute', 'resolution', 'pixels', 'size', 'bitrate', 'numberoffiles', 'published', 'modified', 'popularity', ) for key in filter(lambda k: 'columnWidth' in k, config['itemKeys']): name = key['id'] source = name sort_type = key.get('sort', key['type']) if 'value' in key: if 'layer' in key['value']: continue source = key['value']['key'] sort_type = key['value'].get('type', sort_type) if name not in base_keys: if sort_type == 'title': value = utils.sort_title(canonicalTitle(self.get(source, u'Untitled'))) value = utils.sort_string(value) set_value(s, name, value) elif sort_type == 'person': value = sortNames(self.get(source, [])) value = utils.sort_string(value)[:955] set_value(s, name, value) elif sort_type == 'string': value = self.get(source, u'') if isinstance(value, list): value = u','.join(value) value = utils.sort_string(value)[:955] set_value(s, name, value) elif sort_type in ('length', 'integer', 'float'): #can be length of strings or length of arrays, i.e. keywords value = self.get(source, None) if isinstance(value, list): value = len(value) set_value(s, name, value) elif sort_type == 'words': value = self.get(source, None) if isinstance(value, list): value = '\n'.join(value) if value: value = len(value.split(' ')) set_value(s, name, value) elif sort_type == 'year': value = self.get(source, None) set_value(s, name, value) elif sort_type == 'date': value = self.get(source, None) if isinstance(value, basestring): value = datetime.strptime(value, '%Y-%m-%d') set_value(s, name, value) #sort keys based on database, these will always be available s.itemId = self.itemId.replace('0x', 'xx') s.modified = self.modified s.published = self.published # sort values based on data from videos s.words = 0 #FIXME: get words from all layers or something s.wordsperminute = 0 s.clips = 0 #FIXME: get clips from all layers or something s.popularity = 0 #FIXME: get popularity from somewhere videos = self.main_videos() if len(videos) > 0: s.duration = sum([v.duration for v in videos]) s.resolution = videos[0].width * videos[0].height s.aspectratio = int(1000 * utils.parse_decimal(v.display_aspect_ratio)) #FIXME: should be average over all files if 'bitrate' in videos[0].info: s.bitrate = videos[0].info['bitrate'] s.pixels = sum([v.pixels for v in videos]) s.numberoffiles = self.files.all().count() s.size = sum([v.size for v in videos]) #FIXME: only size of movies? s.volume = 0 else: s.duration = None s.resolution = None s.aspectratio = None s.bitrate = None s.pixels = None s.filename = None s.files = None s.size = None s.volume = None if 'color' in self.data: s.hue, s.saturation, s.brightness = self.data['color'] else: s.hue = None s.saturation = None s.brighness = None s.cuts = len(self.data.get('cuts', [])) if s.duration: s.cutsperminute = s.cuts / (s.duration/60) else: s.cutsperminute = None s.popularity = self.accessed.aggregate(Sum('accessed'))['accessed__sum'] s.save() def update_facets(self): #FIXME: what to do with Unkown Director, Year, Country etc. for key in self.facet_keys: current_values = self.get(key, []) if not isinstance(current_values, list): current_values = [current_values] saved_values = [i.value for i in Facet.objects.filter(item=self, key=key)] removed_values = filter(lambda i: i not in current_values, saved_values) if removed_values: Facet.objects.filter(item=self, key=key, value__in=removed_values).delete() for value in current_values: if value not in saved_values: value_sort = value if key in self.person_keys: value_sort = get_name_sort(value) f = Facet(key=key, value=value, value_sort=value_sort) f.item = self f.save() def path(self, name=''): h = self.itemId return os.path.join('items', h[:2], h[2:4], h[4:6], h[6:], name) ''' Video related functions ''' def frame(self, position, width=128): stream = self.streams.filter(profile=settings.VIDEO_PROFILE) if stream.count()>0: stream = stream[0] else: return None path = os.path.join(settings.MEDIA_ROOT, self.path(), 'frames', "%d"%width, "%s.jpg"%position) if not os.path.exists(path): extract.frame(stream.video.path, path, position, width) return path @property def timeline_prefix(self): return os.path.join(settings.MEDIA_ROOT, self.path(), 'timeline') def main_videos(self): #FIXME: needs to check if more than one user has main files and only # take from "higher" user videos = self.files.filter(is_main=True, is_video=True, available=True) if videos.count()>0: first = videos[0] user = first.instances.all()[0].volume.user #only take videos from same user and with same width/height def check(v): if v.instances.filter(volume__user=user).count()>0 and \ first.width == v.width and first.height == v.height: return True return False videos = filter(check, videos) return videos def update_streams(self): files = {} for f in self.main_videos(): files[utils.sort_title(f.name)] = f.video.path #FIXME: how to detect if something changed? if files: stream, created = Stream.objects.get_or_create(item=self, profile=settings.VIDEO_PROFILE) stream.video.name = stream.path() cmd = [] if os.path.exists(stream.video.path): os.unlink(stream.video.path) elif not os.path.exists(os.path.dirname(stream.video.path)): os.makedirs(os.path.dirname(stream.video.path)) if len(files.values()) > 1: for f in sorted(files): cmd.append('+') cmd.append(files[f]) cmd = [ 'mkvmerge', '-o', stream.video.path ] + cmd[1:] #print cmd p = subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE) #p = subprocess.Popen(cmd, stdin=subprocess.PIPE) p.wait() else: os.symlink(files.values()[0], stream.video.path) stream.save() if 'video' in stream.info: v = stream.info['video'][0] extract.timeline(stream.video.path, self.timeline_prefix) self.stream_aspect = v['width']/v['height'] self.data['cuts'] = extract.cuts(self.timeline_prefix) self.data['color'] = extract.average_color(self.timeline_prefix) #extract.timeline_strip(self, self.data['cuts'], stream.info, self.timeline_prefix[:-8]) stream.extract_derivatives() self.make_local_posters() self.make_poster() self.make_icon() self.available = True self.save() ''' Poster related functions ''' def update_poster_urls(self): _current = {} for s in settings.POSTER_SERVICES: url = '%s?itemId=%s'%(s, self.itemId) try: data = json.loads(ox.net.readUrlUnicode(url)) except: continue for service in data: if service not in _current: _current[service] = [] for poster in data[service]: _current[service].append(poster) #FIXME: remove urls that are no longer listed for service in _current: for poster in _current[service]: p, created = PosterUrl.objects.get_or_create(item=self, url=poster['url'], service=service) if created: p.width = poster['width'] p.height = poster['height'] p.save() def delete_poster(self): if self.poster: path = self.poster.path self.poster.delete() for f in glob(path.replace('.jpg', '*.jpg')): os.unlink(f) def prefered_poster_url(self): if self.poster_url: return self.poster_url self.update_poster_urls() for service in settings.POSTER_PRECEDENCE: for u in self.poster_urls.filter(service=service).order_by('-height'): return u.url return None def make_poster(self, force=False): if not self.poster or force: url = self.prefered_poster_url() if url: data = ox.net.readUrl(url) if force: self.delete_poster() self.poster.save('poster.jpg', ContentFile(data)) self.save() else: if force: self.delete_poster() local_posters = self.make_local_posters() if local_posters: with open(local_posters[0]) as f: self.poster.save('poster.jpg', ContentFile(f.read())) def local_posters(self): part = 1 posters = {} timeline = self.path('timeline.64.png') timeline = os.path.abspath(os.path.join(settings.MEDIA_ROOT, timeline)) if not os.path.exists(timeline): return posters if self.poster_frame >= 0: frame = self.get_poster_frame_path() path = self.path('poster.pandora.%s.%s.jpg'%(part, self.poster_frame)) path = os.path.abspath(os.path.join(settings.MEDIA_ROOT, path)) posters[path] = frame else: for f in self.main_videos(): for frame in f.frames.all(): path = self.path('poster.pandora.%s.%s.jpg'%(part, frame.position)) path = os.path.abspath(os.path.join(settings.MEDIA_ROOT, path)) posters[path] = frame.frame.path part += 1 return posters def make_local_posters(self): posters = self.local_posters() timeline = self.path('timeline.64.png') timeline = os.path.abspath(os.path.join(settings.MEDIA_ROOT, timeline)) if os.path.exists(timeline): for poster in posters: frame = posters[poster] cmd = [settings.ITEM_POSTER, '-t', self.get('title'), '-d', ', '.join(self.get('director', ['Unknown Director'])), '-y', str(self.get('year', '')), '-f', frame, '-l', timeline, '-p', poster ] if settings.USE_IMDB: if len(self.itemId) == 7: cmd += ['-i', self.itemId] cmd += ['-o', self.oxdbId] else: cmd += ['-i', self.itemId] p = subprocess.Popen(cmd) p.wait() return posters.keys() def get_poster_frame_path(self): if self.poster_frame >= 0: size = int(settings.VIDEO_PROFILE.split('.')[0][:-1]) return self.frame(self.poster_frame, size) frames = [] for f in self.main_videos(): for ff in f.frames.all(): frames.append(ff.frame.path) return frames[int(len(frames)/2)] def make_icon(self): frame = self.get_poster_frame_path() if frame: icon = self.path('icon.jpg') self.icon.name = icon timeline = self.path('timeline.64.png') timeline = os.path.abspath(os.path.join(settings.MEDIA_ROOT, timeline)) if os.path.exists(timeline): cmd = [settings.ITEM_ICON, '-f', frame, '-l', timeline, '-i', self.icon.path ] p = subprocess.Popen(cmd) p.wait() self.save() return icon return None config = site_config() Item.facet_keys = [] for key in config['itemKeys']: if 'autocomplete' in key and not 'autocompleteSortKey' in key: Item.facet_keys.append(key['id']) Item.person_keys = [] for key in config['itemKeys']: if 'sort' in key and key['sort'] == 'person': Item.person_keys.append(key['id']) class ItemFind(models.Model): """ used to find items, item.update_find populates this table its used in manager.ItemManager """ class Meta: unique_together = ("item", "key") item = models.ForeignKey('Item', related_name='find', db_index=True) key = models.CharField(max_length=200, db_index=True) value = models.TextField(blank=True) def __unicode__(self): return u"%s=%s" % (self.key, self.value) ''' ItemSort table constructed based on info in site_config['itemKeys'] ''' attrs = { '__module__': 'item.models', 'item': models.OneToOneField('Item', related_name='sort', primary_key=True), } for key in filter(lambda k: 'columnWidth' in k, config['itemKeys']): name = key['id'] name = {'id': 'itemId'}.get(name, name) sort_type = key.get('sort', key['type']) if isinstance(sort_type, list): sort_type = sort_type[0] model = { 'char': (models.CharField, dict(null=True, max_length=1000, db_index=True)), 'year': (models.CharField, dict(null=True, max_length=4, db_index=True)), 'integer': (models.BigIntegerField, dict(null=True, blank=True, db_index=True)), 'float': (models.FloatField, dict(null=True, blank=True, db_index=True)), 'date': (models.DateTimeField, dict(null=True, blank=True, db_index=True)) }[{ 'string': 'char', 'title': 'char', 'person': 'char', 'year': 'year', 'words': 'integer', 'length': 'integer', 'date': 'date', 'hue': 'float', }.get(sort_type, sort_type)] attrs[name] = model[0](**model[1]) ItemSort = type('ItemSort', (models.Model,), attrs) ItemSort.fields = [f.name for f in ItemSort._meta.fields] class Access(models.Model): class Meta: unique_together = ("item", "user") access = models.DateTimeField(auto_now=True) item = models.ForeignKey(Item, related_name='accessed') user = models.ForeignKey(User, null=True, related_name='accessed_items') accessed = models.IntegerField(default=0) def save(self, *args, **kwargs): if not self.accessed: self.accessed = 0 self.accessed += 1 super(Access, self).save(*args, **kwargs) def __unicode__(self): if self.user: return u"%s/%s/%s" % (self.user, self.item, self.access) return u"%s/%s" % (self.item, self.access) class Facet(models.Model): ''' used for keys that can have multiple values like people, languages etc. does not perform to well if total number of items goes above 10k this happens for keywords in 0xdb right now ''' class Meta: unique_together = ("item", "key", "value") item = models.ForeignKey('Item', related_name='facets') key = models.CharField(max_length=200, db_index=True) value = models.CharField(max_length=200, db_index=True) value_sort = models.CharField(max_length=200, db_index=True) def save(self, *args, **kwargs): if not self.value_sort: self.value_sort = utils.sort_string(self.value) super(Facet, self).save(*args, **kwargs) class Stream(models.Model): class Meta: unique_together = ("item", "profile") item = models.ForeignKey(Item, related_name='streams') profile = models.CharField(max_length=255, default='96p.webm') video = models.FileField(default=None, blank=True, upload_to=lambda f, x: f.path()) source = models.ForeignKey('Stream', related_name='derivatives', default=None, null=True) available = models.BooleanField(default=False) info = fields.DictField(default={}) def __unicode__(self): return u"%s/%s" % (self.item, self.profile) def path(self): return self.item.path(self.profile) def extract_derivatives(self): for profile in settings.VIDEO_DERIVATIVES: derivative, created = Stream.objects.get_or_create(profile=profile, item=self.item) if created: derivative.source = self derivative.video.name = self.video.name.replace(self.profile, profile) derivative.encode() derivative.save() return True def encode(self): if self.source: video = self.source.video.path target = self.video.path profile = self.profile info = ox.avinfo(video) if extract.stream(video, target, profile, info): self.available=True self.save() def save(self, *args, **kwargs): if self.video and not self.info: self.info = ox.avinfo(self.video.path) super(Stream, self).save(*args, **kwargs) class PosterUrl(models.Model): class Meta: unique_together = ("item", "service", "url") ordering = ('-height', ) item = models.ForeignKey(Item, related_name='poster_urls') url = models.CharField(max_length=1024) service = models.CharField(max_length=1024) width = models.IntegerField(default=80) height = models.IntegerField(default=128) def __unicode__(self): return u'%s %s %dx%d' % (unicode(self.item), self.service, self.width, self.height)