def transcode(self, media_file):
"""Transcode an existing MediaFile.
The MediaFile may be stored already by another storage engine.
New MediaFiles will be created for each transcoding generated by this
method.
:type media_file: :class:`~mediacore.model.media.MediaFile`
:param media_file: The MediaFile object to transcode.
:raises CannotTranscode: If this storage engine can't or won't transcode the file.
:rtype: NoneType
:returns: Nothing
"""
if isinstance(media_file.storage, PandaStorage):
return
profile_names = self._data[PANDA_PROFILES]
if not profile_names \
or media_file.type != VIDEO \
or not download_uri(media_file):
raise CannotTranscode
panda_helper = self.panda_helper()
state_update_url = url_for(
controller='/panda/admin/media',
action='panda_update',
file_id=media_file.id,
qualified=True
)
# We can only tell panda to encode this video once the transaction has
# been committed, otherwise panda get's a 404 when they try to download
# the file from us.
def transcode():
try:
panda_helper.transcode_media_file(media_file, profile_names,
state_update_url=state_update_url)
except PandaException, e:
log.exception(e)
def transcode_media_file(self, media_file, profile_ids, state_update_url=None):
uri = download_uri(media_file)
if not uri:
raise PandaException('Cannot transcode because no download URL exists.')
transcode_details = self.client.transcode_file(str(uri), profile_ids, state_update_url)
self.associate_video_id(media_file, transcode_details['id'])
