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Multimedia refractoring, and added video thumbnail support

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This commit is contained in:
Joar Wandborg 2011-10-05 22:58:42 +02:00
parent 62be795e91
commit 26729e0277
6 changed files with 213 additions and 85 deletions
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3
mediagoblin/media_types/__init__.py
View File

@ -17,6 +17,9 @@
import os
import sys
from mediagoblin.util import lazy_pass_to_ugettext as _
class FileTypeNotSupported(Exception):
pass

168
mediagoblin/media_types/video/processing.py
View File

@ -17,16 +17,17 @@
import Image
import tempfile
import pkg_resources
import os
from celery.task import Task
from celery import registry
from mediagoblin.db.util import ObjectId
from mediagoblin import mg_globals as mgg
from mediagoblin.util import lazy_pass_to_ugettext as _
import mediagoblin.media_types.video
from mediagoblin.process_media.errors import BaseProcessingFail, BadMediaFail
from mediagoblin.process_media import mark_entry_failed
from . import transcoders
import gobject
gobject.threads_init()
@ -39,10 +40,12 @@ from arista.transcoder import TranscoderOptions
THUMB_SIZE = 180, 180
MEDIUM_SIZE = 640, 640
ARISTA_DEVICE_KEY = 'web'
ARISTA_DEVICE = 'devices/web-advanced.json'
ARISTA_PRESET = None
loop = None # Is this even used?
loop = None
logger = logging.getLogger(__name__)
logging.basicConfig()
logger.setLevel(logging.DEBUG)
@ -51,10 +54,20 @@ logger.setLevel(logging.DEBUG)
def process_video(entry):
"""
Code to process a video
Much of this code is derived from the arista-transcoder script in
the arista PyPI package and changed to match the needs of
MediaGoblin
This function sets up the arista video encoder in some kind of new thread
and attaches callbacks to that child process, hopefully, the
entry-complete callback will be called when the video is done.
"""
global loop
loop = None
''' Empty dict, will store data which will be passed to the callback
functions '''
info = {}
workbench = mgg.workbench_manager.create_workbench()
queued_filepath = entry['queued_media_file']
@ -62,29 +75,36 @@ def process_video(entry):
mgg.queue_store, queued_filepath,
'source')
''' Initialize arista '''
arista.init()
''' Loads a preset file which specifies the format of the output video'''
device = arista.presets.load(
pkg_resources.resource_filename(
__name__,
ARISTA_DEVICE))
web_advanced_preset = pkg_resources.resource_filename(
__name__,
'presets/web-advanced.json')
device = arista.presets.load(web_advanced_preset)
# FIXME: Is this needed since we only transcode one video?
queue = arista.queue.TranscodeQueue()
info['tmp_file'] = tmp_file = tempfile.NamedTemporaryFile()
info['tmp_file'] = tempfile.NamedTemporaryFile(delete=False)
info['medium_filepath'] = medium_filepath = create_pub_filepath(entry, 'video.webm')
info['medium_filepath'] = create_pub_filepath(
entry, 'video.webm')
output = tmp_file.name
info['thumb_filepath'] = create_pub_filepath(
entry, 'thumbnail.jpg')
uri = 'file://' + queued_filename
preset = device.presets[device.default]
# With the web-advanced.json device preset, this will select
# 480p WebM w/ OGG Vorbis
preset = device.presets[ARISTA_PRESET or device.default]
logger.debug('preset: {0}'.format(preset))
opts = TranscoderOptions(uri, preset, output)
opts = TranscoderOptions(
'file://' + queued_filename, # Arista did it this way, IIRC
preset,
info['tmp_file'].name)
queue.append(opts)
@ -95,68 +115,78 @@ def process_video(entry):
queue.connect("entry-error", _transcoding_error, info)
queue.connect("entry-complete", _transcoding_complete, info)
info['loop'] = loop = gobject.MainLoop()
# Add data to the info dict, making it available to the callbacks
info['loop'] = gobject.MainLoop()
info['queued_filename'] = queued_filename
info['queued_filepath'] = queued_filepath
info['workbench'] = workbench
info['preset'] = preset
info['loop'].run()
logger.debug('info: {0}'.format(info))
loop.run()
def __create_thumbnail(info):
thumbnail = tempfile.NamedTemporaryFile()
logger.info('thumbnailing...')
transcoders.VideoThumbnailer(info['tmp_file'].name, thumbnail.name)
logger.debug('Done thumbnailing')
os.remove(info['tmp_file'].name)
mgg.public_store.get_file(info['thumb_filepath'], 'wb').write(
thumbnail.read())
info['entry']['media_files']['thumb'] = info['thumb_filepath']
info['entry'].save()
def __close_processing(queue, qentry, info, **kwargs):
'''
try:
#thumb = Image.open(mediagoblin.media_types.video.MEDIA_MANAGER['default_thumb'])
except IOError:
raise BadMediaFail()
thumb.thumbnail(THUMB_SIZE, Image.ANTIALIAS)
# ensure color mode is compatible with jpg
if thumb.mode != "RGB":
thumb = thumb.convert("RGB")
thumb_filepath = create_pub_filepath(entry, 'thumbnail.jpg')
thumb_file = mgg.public_store.get_file(thumb_filepath, 'w')
with thumb_file:
thumb.save(thumb_file, "JPEG", quality=90)
Updates MediaEntry, moves files, handles errors
'''
if not kwargs.get('error'):
logger.info('Transcoding successful')
def __close_processing(queue, qentry, info, error=False):
'''
Update MediaEntry, move files, handle errors
'''
if not error:
qentry.transcoder.stop()
gobject.idle_add(info['loop'].quit)
info['loop'].quit()
info['loop'].quit() # Do I have to do this again?
print('\n-> Saving video...\n')
logger.info('Saving files...')
# Write the transcoded media to the storage system
with info['tmp_file'] as tmp_file:
mgg.public_store.get_file(info['medium_filepath'], 'wb').write(
tmp_file.read())
info['entry']['media_files']['medium'] = info['medium_filepath']
print('\n=== DONE! ===\n')
# we have to re-read because unlike PIL, not everything reads
# things in string representation :)
queued_file = file(info['queued_filename'], 'rb')
with queued_file:
original_filepath = create_pub_filepath(info['entry'], info['queued_filepath'][-1])
original_filepath = create_pub_filepath(
info['entry'],
info['queued_filepath'][-1])
with mgg.public_store.get_file(original_filepath, 'wb') as original_file:
with mgg.public_store.get_file(original_filepath, 'wb') as \
original_file:
original_file.write(queued_file.read())
mgg.queue_store.delete_file(info['queued_filepath'])
logger.debug('...Done')
info['entry']['queued_media_file'] = []
media_files_dict = info['entry'].setdefault('media_files', {})
media_files_dict['original'] = original_filepath
# media_files_dict['thumb'] = thumb_filepath
info['entry']['state'] = u'processed'
info['entry']['media_data'][u'preset'] = info['preset'].name
__create_thumbnail(info)
info['entry'].save()
else:
@ -174,17 +204,20 @@ def _transcoding_start(queue, qentry, info):
logger.info('-> Starting transcoding')
logger.debug(queue, qentry, info)
def _transcoding_complete(*args):
__close_processing(*args)
print(args)
def _transcoding_error(*args):
logger.info('-> Error')
__close_processing(*args, error=True)
logger.debug(*args)
def _transcoding_error(queue, qentry, info):
logger.info('Error')
__close_processing(queue, qentry, info, error=True)
logger.debug(queue, quentry, info)
def _transcoding_pass_setup(queue, qentry, options):
logger.info('-> Pass setup')
logger.info('Pass setup')
logger.debug(queue, qentry, options)
@ -212,34 +245,6 @@ def create_pub_filepath(entry, filename):
filename])
class BaseProcessingFail(Exception):
"""
Base exception that all other processing failure messages should
subclass from.
You shouldn't call this itself; instead you should subclass it
and provid the exception_path and general_message applicable to
this error.
"""
general_message = u''
@property
def exception_path(self):
return u"%s:%s" % (
self.__class__.__module__, self.__class__.__name__)
def __init__(self, **metadata):
self.metadata = metadata or {}
class BadMediaFail(BaseProcessingFail):
"""
Error that should be raised when an inappropriate file was given
for the media type specified.
"""
general_message = _(u'Invalid file given for media type.')
################################
# Media processing initial steps
################################
@ -311,4 +316,3 @@ def mark_entry_failed(entry_id, exc):
{'$set': {u'state': u'failed',
u'fail_error': None,
u'fail_metadata': {}}})

113
mediagoblin/media_types/video/transcoders.py Normal file
View File

@ -0,0 +1,113 @@
# GNU MediaGoblin -- federated, autonomous media hosting
# Copyright (C) 2011 MediaGoblin contributors. See AUTHORS.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import sys
import logging
_log = logging.getLogger(__name__)
logging.basicConfig()
_log.setLevel(logging.INFO)
try:
import gobject
except:
_log.error('Could not import gobject')
try:
import pygst
pygst.require('0.10')
import gst
except:
_log.error('pygst could not be imported')
class VideoThumbnailer:
def __init__(self, src, dst):
self._set_up_pass(src, dst)
self.loop = gobject.MainLoop()
self.loop.run()
def _set_up_pass(self, src, dst):
self.pipeline = gst.Pipeline('TranscodingPipeline')
_log.debug('Pipeline: {0}'.format(self.pipeline))
self.filesrc = gst.element_factory_make('filesrc', 'filesrc')
self.filesrc.set_property('location', src)
self.pipeline.add(self.filesrc)
self.decoder = gst.element_factory_make('decodebin2', 'decoder')
self.decoder.connect('new-decoded-pad', self._on_dynamic_pad)
self.pipeline.add(self.decoder)
self.ffmpegcolorspace = gst.element_factory_make('ffmpegcolorspace', 'ffmpegcolorspace')
self.pipeline.add(self.ffmpegcolorspace)
self.videoscale = gst.element_factory_make('videoscale', 'videoscale')
self.pipeline.add(self.videoscale)
self.capsfilter = gst.element_factory_make('capsfilter', 'capsfilter')
self.capsfilter.set_property('caps', gst.caps_from_string('video/x-raw-rgb, width=180, height=100'))
self.pipeline.add(self.capsfilter)
self.jpegenc = gst.element_factory_make('jpegenc', 'jpegenc')
self.pipeline.add(self.jpegenc)
self.filesink = gst.element_factory_make('filesink', 'filesink')
self.filesink.set_property('location', dst)
self.pipeline.add(self.filesink)
# Link all the elements together
self.filesrc.link(self.decoder)
self.ffmpegcolorspace.link(self.videoscale)
self.videoscale.link(self.capsfilter)
self.capsfilter.link(self.jpegenc)
self.jpegenc.link(self.filesink)
bus = self.pipeline.get_bus()
bus.add_signal_watch()
bus.connect('message', self._on_message)
self.pipeline.set_state(gst.STATE_PLAYING)
def _on_message(self, bus, message):
_log.info((bus, message))
t = message.type
if t == gst.MESSAGE_EOS:
self.__shutdown()
def _on_dynamic_pad(self, dbin, pad, islast):
'''
Callback called when ``decodebin2`` has a pad that we can connect to
'''
pad.link(
self.ffmpegcolorspace.get_pad('sink'))
def __shutdown(self):
_log.debug(self.loop)
self.pipeline.set_state(gst.STATE_NULL)
gobject.idle_add(self.loop.quit)
if __name__ == '__main__':
VideoThumbnailer('/home/joar/Dropbox/Public/blender/fluid-box.mp4', '/tmp/dest.jpg')
VideoThumbnailer('/home/joar/Dropbox/iPhone/Video 2011-10-05 21 58 03.mov', '/tmp/dest2.jpg')

8
mediagoblin/views.py
View File

@ -14,10 +14,14 @@
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import sys
from mediagoblin import mg_globals
from mediagoblin.util import render_to_response, Pagination
from mediagoblin.db.util import DESCENDING
from mediagoblin.decorators import uses_pagination
from mediagoblin import media_types
@uses_pagination
def root_view(request, page):
@ -26,12 +30,12 @@ def root_view(request, page):
pagination = Pagination(page, cursor)
media_entries = pagination()
return render_to_response(
request, 'mediagoblin/root.html',
{'media_entries': media_entries,
'allow_registration': mg_globals.app_config["allow_registration"],
'pagination': pagination})
'pagination': pagination,
'sys': sys})
def simple_template_render(request):

5
mediagoblin/workbench.py
View File

@ -45,7 +45,10 @@ class Workbench(object):
def __str__(self):
return str(self.dir)
def __repr__(self):
return repr(self.dir)
try:
return str(self)
except AttributeError:
return 'None'
def joinpath(self, *args):
return os.path.join(self.dir, *args)

1
setup.py
View File

@ -66,6 +66,7 @@ setup(
## their package managers.
# 'lxml',
],
requires=['gst'],
test_suite='nose.collector',
entry_points = """\
[console_scripts]