def forwards(self, orm):
"Write your forwards methods here."
for course in orm['courses.Course'].objects.all():
course.promotion_media_content_id = extract_YT_video_id(course.promotion_video)
course.promotion_media_content_type = "youtube"
course.save()
for knowledgequantum in orm['courses.KnowledgeQuantum'].objects.all():
knowledgequantum.media_content_id = extract_YT_video_id(knowledgequantum.video)
knowledgequantum.media_content_type = "youtube"
knowledgequantum.save()
for question in orm['courses.Question'].objects.all():
question.solution_media_content_id = extract_YT_video_id(question.solution_video)
question.solution_media_content_type = "youtube"
question.save()
def dehydrate_solutionID(self, bundle):
# Only return solution if the deadline has been reached, or there is
# no deadline
unit = bundle.obj.kq.unit
if unit.unittype != 'n' and unit.deadline > datetime.now(unit.deadline.tzinfo):
return None
return extract_YT_video_id(bundle.obj.solution_video)
def forwards(self, orm):
"Write your forwards methods here."
for course in orm['courses.Course'].objects.all():
course.promotion_media_content_id = extract_YT_video_id(course.promotion_video)
course.promotion_media_content_type = "youtube"
course.save()
for knowledgequantum in orm['courses.KnowledgeQuantum'].objects.all():
knowledgequantum.media_content_id = extract_YT_video_id(knowledgequantum.video)
knowledgequantum.media_content_type = "youtube"
knowledgequantum.save()
for question in orm['courses.Question'].objects.all():
question.solution_media_content_id = extract_YT_video_id(question.solution_video)
question.solution_media_content_type = "youtube"
question.save()
def dehydrate_solutionID(self, bundle):
# Only return solution if the deadline has been reached, or there is
# no deadline
unit = bundle.obj.kq.unit
if unit.unittype != 'n' and unit.deadline > datetime.now(unit.deadline.tzinfo):
return None
return extract_YT_video_id(bundle.obj.solution)
def do_process_video_task(question):
url = question.kq.video
try:
tempdir = tempfile.mkdtemp()
frame = process_video(tempdir, url)
if frame is not None:
video_id = extract_YT_video_id(url)
if video_id == u'':
raise NotFound(url)
question.last_frame.save("%s.png" % video_id, File(open(frame)))
except IOError:
logger.error('Video %s could not be downloaded or processed. Probably the codec is not supported, please try again with a newer YouTube video.' % url)
except NotFound:
logger.error('Video %s not found' % url)
finally:
shutil.rmtree(tempdir)
def do_process_video_task(question_id):
from moocng.courses.models import Question
question = Question.objects.get(id=question_id)
url = question.kq.video
try:
tempdir = tempfile.mkdtemp()
frame = process_video(tempdir, url)
if frame is not None:
video_id = extract_YT_video_id(url)
if video_id == u'':
raise NotFound(url)
question.last_frame.save("%s.png" % video_id, File(open(frame)))
except IOError:
logger.error('Video %s could not be downloaded or processed. Probably the codec is not supported, please try again with a newer YouTube video.' % url)
except NotFound:
logger.error('Video %s not found' % url)
finally:
shutil.rmtree(tempdir)
def process_video(tempdir, url):
"""Download the youtube video associated with the KQ of this question
and extract the last frame of such video."""
video_id = extract_YT_video_id(url)
if video_id == u'':
raise NotFound(url)
url = "http://www.youtube.com/watch?v=%s" % video_id
logger.info('Downloading video %s' % url)
try:
filename = download(url, tempdir)
filename = path.join(tempdir, filename)
except urllib2.HTTPError as e:
logger.error('Error downloading video %s: %s' % (url, e))
return None
except:
raise
try:
time = duration(filename)
logger.info('The downloaded video %s has a duration of %s'
% (filename, time))
except:
raise
try:
# Get the time position of the last second of the video
time = time.split(':')
dt = datetime.datetime(2012, 01, 01, int(time[0]), int(time[1]),
int(time[2]))
dt = dt - second
time = "%s.900" % dt.strftime("%H:%M:%S")
logger.info('Getting the last frame at %s' % time)
frame = last_frame(filename, time)
except:
raise
return frame
def process_video(tempdir, url):
"""Download the youtube video associated with the KQ of this question
and extract the last frame of such video."""
video_id = extract_YT_video_id(url)
if video_id == u'':
raise NotFound(url)
url2download = "http://www.youtube.com/watch?v=%s" % video_id
logger.info('Downloading video %s' % url2download)
try:
filename = download(url2download, tempdir)
filename = path.join(tempdir, filename)
except urllib2.HTTPError as e:
logger.error('Error downloading video %s: %s' % (url2download, e))
return None
except:
raise
try:
time = duration(filename)
logger.info('The downloaded video %s has a duration of %s' %
(filename, time))
except:
raise
try:
# Get the time position of the last second of the video
dt = datetime.datetime.strptime(time, "%H:%M:%S.%f")
dt = dt - second
fototime = dt.strftime("%H:%M:%S.%f")
logger.info('Getting the last frame at %s' % fototime)
frame = last_frame(filename, fototime)
except:
raise
return frame
def dehydrate_solutionID(self, bundle):
return extract_YT_video_id(bundle.obj.solution_video)
def dehydrate_videoID(self, bundle):
return extract_YT_video_id(bundle.obj.video)
def get_embeded_code_for_promotion_video(self):
if self.promotion_video:
return extract_YT_video_id(self.promotion_video)
def get_embeded_code_for_promotion_video(self):
if self.promotion_video:
return extract_YT_video_id(self.promotion_video)
def dehydrate_solutionID(self, bundle):
return extract_YT_video_id(bundle.obj.solution)
def dehydrate_videoID(self, bundle):
return extract_YT_video_id(bundle.obj.video)
