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Merge remote-tracking branch 'joar/audio+sniffing'

Browse Source 
Conflicts:
	mediagoblin/media_types/image/processing.py
	mediagoblin/media_types/video/__init__.py
	mediagoblin/media_types/video/processing.py
	mediagoblin/tests/test_submission.py
This commit is contained in:
Joar Wandborg
2012-03-27 12:05:09 +02:00
parent d0cb752992 c56d4b55a1
commit deea3f6661
22 changed files with 1536 additions and 90 deletions
Download Patch File Download Diff File Expand all files Collapse all files

60
mediagoblin/media_types/__init__.py
View File

@@ -16,10 +16,13 @@
import os
import sys
import logging
import tempfile
from mediagoblin import mg_globals
from mediagoblin.tools.translate import lazy_pass_to_ugettext as _
_log = logging.getLogger(__name__)
class FileTypeNotSupported(Exception):
pass
@@ -28,6 +31,35 @@ class InvalidFileType(Exception):
pass
def sniff_media(media):
'''
Iterate through the enabled media types and find those suited
for a certain file.
'''
try:
return get_media_type_and_manager(media.filename)
except FileTypeNotSupported:
_log.info('No media handler found by file extension. Doing it the expensive way...')
# Create a temporary file for sniffers suchs as GStreamer-based
# Audio video
media_file = tempfile.NamedTemporaryFile()
media_file.write(media.file.read())
media.file.seek(0)
for media_type, manager in get_media_managers():
_log.info('Sniffing {0}'.format(media_type))
if manager['sniff_handler'](media_file, media=media):
_log.info('{0} accepts the file'.format(media_type))
return media_type, manager
else:
_log.debug('{0} did not accept the file'.format(media_type))
raise FileTypeNotSupported(
# TODO: Provide information on which file types are supported
_(u'Sorry, I don\'t support that file type :('))
def get_media_types():
"""
Generator, yields the available media types
@@ -42,7 +74,7 @@ def get_media_managers():
'''
for media_type in get_media_types():
__import__(media_type)
yield media_type, sys.modules[media_type].MEDIA_MANAGER
@@ -67,22 +99,22 @@ def get_media_manager(_media_type):
def get_media_type_and_manager(filename):
'''
Get the media type and manager based on a filename
Try to find the media type based on the file name, extension
specifically. This is used as a speedup, the sniffing functionality
then falls back on more in-depth bitsniffing of the source file.
'''
if filename.find('.') > 0:
# Get the file extension
ext = os.path.splitext(filename)[1].lower()
else:
raise InvalidFileType(
_(u'Could not extract any file extension from "{filename}"').format(
filename=filename))
for media_type, manager in get_media_managers():
# Omit the dot from the extension and match it against
# the media manager
if ext[1:] in manager['accepted_extensions']:
return media_type, manager
for media_type, manager in get_media_managers():
# Omit the dot from the extension and match it against
# the media manager
if ext[1:] in manager['accepted_extensions']:
return media_type, manager
else:
raise FileTypeNotSupported(
# TODO: Provide information on which file types are supported
_(u'Sorry, I don\'t support that file type :('))
_log.info('File {0} has no file extension, let\'s hope the sniffers get it.'.format(
filename))
raise FileTypeNotSupported(
_(u'Sorry, I don\'t support that file type :('))

4
mediagoblin/media_types/ascii/__init__.py
View File

@@ -14,13 +14,15 @@
# 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/>.
from mediagoblin.media_types.ascii.processing import process_ascii
from mediagoblin.media_types.ascii.processing import process_ascii, \
sniff_handler
MEDIA_MANAGER = {
"human_readable": "ASCII",
"processor": process_ascii, # alternately a string,
# 'mediagoblin.media_types.image.processing'?
"sniff_handler": sniff_handler,
"display_template": "mediagoblin/media_displays/ascii.html",
"default_thumb": "images/media_thumbs/ascii.jpg",
"accepted_extensions": [

1
mediagoblin/media_types/ascii/asciitoimage.py
View File

@@ -23,6 +23,7 @@ import os
_log = logging.getLogger(__name__)
class AsciiToImage(object):
'''
Converter of ASCII art into image files, preserving whitespace

22
mediagoblin/media_types/ascii/processing.py
View File

@@ -19,11 +19,25 @@ import Image
import logging
from mediagoblin import mg_globals as mgg
from mediagoblin.processing import create_pub_filepath, THUMB_SIZE
from mediagoblin.processing import create_pub_filepath
from mediagoblin.media_types.ascii import asciitoimage
_log = logging.getLogger(__name__)
SUPPORTED_EXTENSIONS = ['txt', 'asc', 'nfo']
def sniff_handler(media_file, **kw):
if kw.get('media') is not None:
name, ext = os.path.splitext(kw['media'].filename)
clean_ext = ext[1:].lower()
if clean_ext in SUPPORTED_EXTENSIONS:
return True
return False
def process_ascii(entry):
'''
Code to process a txt file
@@ -69,7 +83,10 @@ def process_ascii(entry):
queued_file.read())
with file(tmp_thumb_filename, 'w') as thumb_file:
thumb.thumbnail(THUMB_SIZE, Image.ANTIALIAS)
thumb.thumbnail(
(mgg.global_config['media:thumb']['max_width'],
mgg.global_config['media:thumb']['max_height']),
Image.ANTIALIAS)
thumb.save(thumb_file)
_log.debug('Copying local file to public storage')
@@ -84,7 +101,6 @@ def process_ascii(entry):
as original_file:
original_file.write(queued_file.read())
queued_file.seek(0) # Rewind *again*
unicode_filepath = create_pub_filepath(entry, 'ascii-portable.txt')

25
mediagoblin/media_types/audio/__init__.py Normal file
View File

@@ -0,0 +1,25 @@
# GNU MediaGoblin -- federated, autonomous media hosting
# Copyright (C) 2011, 2012 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/>.
from mediagoblin.media_types.audio.processing import process_audio, \
sniff_handler
MEDIA_MANAGER = {
'human_readable': 'Audio',
'processor': process_audio,
'sniff_handler': sniff_handler,
'display_template': 'mediagoblin/media_displays/audio.html',
'accepted_extensions': ['mp3', 'flac', 'ogg', 'wav', 'm4a']}

1
mediagoblin/media_types/audio/audioprocessing.py Symbolic link
View File

@@ -0,0 +1 @@
../../../extlib/freesound/audioprocessing.py

131
mediagoblin/media_types/audio/processing.py Normal file
View File

@@ -0,0 +1,131 @@
# GNU MediaGoblin -- federated, autonomous media hosting
# Copyright (C) 2011, 2012 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 logging
import tempfile
import os
from mediagoblin import mg_globals as mgg
from mediagoblin.processing import create_pub_filepath, BadMediaFail
from mediagoblin.media_types.audio.transcoders import AudioTranscoder, \
AudioThumbnailer
_log = logging.getLogger(__name__)
def sniff_handler(media_file, **kw):
try:
transcoder = AudioTranscoder()
data = transcoder.discover(media_file.name)
except BadMediaFail:
_log.debug('Audio discovery raised BadMediaFail')
return False
if data.is_audio == True and data.is_video == False:
return True
return False
def process_audio(entry):
audio_config = mgg.global_config['media_type:mediagoblin.media_types.audio']
workbench = mgg.workbench_manager.create_workbench()
queued_filepath = entry.queued_media_file
queued_filename = workbench.localized_file(
mgg.queue_store, queued_filepath,
'source')
ogg_filepath = create_pub_filepath(
entry,
'{original}.webm'.format(
original=os.path.splitext(
queued_filepath[-1])[0]))
transcoder = AudioTranscoder()
with tempfile.NamedTemporaryFile() as ogg_tmp:
transcoder.transcode(
queued_filename,
ogg_tmp.name,
quality=audio_config['quality'])
data = transcoder.discover(ogg_tmp.name)
_log.debug('Saving medium...')
mgg.public_store.get_file(ogg_filepath, 'wb').write(
ogg_tmp.read())
entry.media_files['ogg'] = ogg_filepath
entry.media_data['audio'] = {
u'length': int(data.audiolength)}
if audio_config['create_spectrogram']:
spectrogram_filepath = create_pub_filepath(
entry,
'{original}-spectrogram.jpg'.format(
original=os.path.splitext(
queued_filepath[-1])[0]))
with tempfile.NamedTemporaryFile(suffix='.wav') as wav_tmp:
_log.info('Creating WAV source for spectrogram')
transcoder.transcode(
queued_filename,
wav_tmp.name,
mux_string='wavenc')
thumbnailer = AudioThumbnailer()
with tempfile.NamedTemporaryFile(suffix='.jpg') as spectrogram_tmp:
thumbnailer.spectrogram(
wav_tmp.name,
spectrogram_tmp.name,
width=mgg.global_config['media:medium']['max_width'])
_log.debug('Saving spectrogram...')
mgg.public_store.get_file(spectrogram_filepath, 'wb').write(
spectrogram_tmp.read())
entry.media_files['spectrogram'] = spectrogram_filepath
with tempfile.NamedTemporaryFile(suffix='.jpg') as thumb_tmp:
thumbnailer.thumbnail_spectrogram(
spectrogram_tmp.name,
thumb_tmp.name,
(mgg.global_config['media:thumb']['max_width'],
mgg.global_config['media:thumb']['max_height']))
thumb_filepath = create_pub_filepath(
entry,
'{original}-thumbnail.jpg'.format(
original=os.path.splitext(
queued_filepath[-1])[0]))
mgg.public_store.get_file(thumb_filepath, 'wb').write(
thumb_tmp.read())
entry.media_files['thumb'] = thumb_filepath
else:
entry.media_files['thumb'] = ['fake', 'thumb', 'path.jpg']
mgg.queue_store.delete_file(queued_filepath)
entry.save()
# clean up workbench
workbench.destroy_self()

237
mediagoblin/media_types/audio/transcoders.py Normal file
View File

@@ -0,0 +1,237 @@
# GNU MediaGoblin -- federated, autonomous media hosting
# Copyright (C) 2011, 2012 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 pdb
import logging
from PIL import Image
from mediagoblin.processing import BadMediaFail
from mediagoblin.media_types.audio import audioprocessing
_log = logging.getLogger(__name__)
CPU_COUNT = 2 # Just assuming for now
# IMPORT MULTIPROCESSING
try:
import multiprocessing
try:
CPU_COUNT = multiprocessing.cpu_count()
except NotImplementedError:
_log.warning('multiprocessing.cpu_count not implemented!\n'
'Assuming 2 CPU cores')
except ImportError:
_log.warning('Could not import multiprocessing, assuming 2 CPU cores')
# IMPORT GOBJECT
try:
import gobject
gobject.threads_init()
except ImportError:
raise Exception('gobject could not be found')
# IMPORT PYGST
try:
import pygst
# We won't settle for less. For now, this is an arbitrary limit
# as we have not tested with > 0.10
pygst.require('0.10')
import gst
import gst.extend.discoverer
except ImportError:
raise Exception('gst/pygst >= 0.10 could not be imported')
import numpy
class AudioThumbnailer(object):
def __init__(self):
_log.info('Initializing {0}'.format(self.__class__.__name__))
def spectrogram(self, src, dst, **kw):
width = kw['width']
height = int(kw.get('height', float(width) * 0.3))
fft_size = kw.get('fft_size', 2048)
callback = kw.get('progress_callback')
processor = audioprocessing.AudioProcessor(
src,
fft_size,
numpy.hanning)
samples_per_pixel = processor.audio_file.nframes / float(width)
spectrogram = audioprocessing.SpectrogramImage(width, height, fft_size)
for x in range(width):
if callback and x % (width / 10) == 0:
callback((x * 100) / width)
seek_point = int(x * samples_per_pixel)
(spectral_centroid, db_spectrum) = processor.spectral_centroid(
seek_point)
spectrogram.draw_spectrum(x, db_spectrum)
if callback:
callback(100)
spectrogram.save(dst)
def thumbnail_spectrogram(self, src, dst, thumb_size):
'''
Takes a spectrogram and creates a thumbnail from it
'''
if not (type(thumb_size) == tuple and len(thumb_size) == 2):
raise Exception('thumb_size argument should be a tuple(width, height)')
im = Image.open(src)
im_w, im_h = [float(i) for i in im.size]
th_w, th_h = [float(i) for i in thumb_size]
wadsworth_position = im_w * 0.3
start_x = max((
wadsworth_position - ((im_h * (th_w / th_h)) / 2.0),
0.0))
stop_x = start_x + (im_h * (th_w / th_h))
th = im.crop((
int(start_x), 0,
int(stop_x), int(im_h)))
if th.size[0] > th_w or th.size[1] > th_h:
th.thumbnail(thumb_size, Image.ANTIALIAS)
th.save(dst)
class AudioTranscoder(object):
def __init__(self):
_log.info('Initializing {0}'.format(self.__class__.__name__))
# Instantiate MainLoop
self._loop = gobject.MainLoop()
self._failed = None
def discover(self, src):
self._src_path = src
_log.info('Discovering {0}'.format(src))
self._discovery_path = src
self._discoverer = gst.extend.discoverer.Discoverer(
self._discovery_path)
self._discoverer.connect('discovered', self.__on_discovered)
self._discoverer.discover()
self._loop.run() # Run MainLoop
if self._failed:
raise self._failed
# Once MainLoop has returned, return discovery data
return getattr(self, '_discovery_data', False)
def __on_discovered(self, data, is_media):
if not is_media:
self._failed = BadMediaFail()
_log.error('Could not discover {0}'.format(self._src_path))
self.halt()
_log.debug('Discovered: {0}'.format(data.__dict__))
self._discovery_data = data
# Gracefully shut down MainLoop
self.halt()
def transcode(self, src, dst, **kw):
_log.info('Transcoding {0} into {1}'.format(src, dst))
self._discovery_data = kw.get('data', self.discover(src))
self.__on_progress = kw.get('progress_callback')
quality = kw.get('quality', 0.3)
mux_string = kw.get(
'mux_string',
'vorbisenc quality={0} ! webmmux'.format(quality))
# Set up pipeline
self.pipeline = gst.parse_launch(
'filesrc location="{src}" ! '
'decodebin2 ! queue ! audiorate tolerance={tolerance} ! '
'audioconvert ! audio/x-raw-float,channels=2 ! '
'{mux_string} ! '
'progressreport silent=true ! '
'filesink location="{dst}"'.format(
src=src,
tolerance=80000000,
mux_string=mux_string,
dst=dst))
self.bus = self.pipeline.get_bus()
self.bus.add_signal_watch()
self.bus.connect('message', self.__on_bus_message)
self.pipeline.set_state(gst.STATE_PLAYING)
self._loop.run()
def __on_bus_message(self, bus, message):
_log.debug(message)
if (message.type == gst.MESSAGE_ELEMENT
and message.structure.get_name() == 'progress'):
data = dict(message.structure)
if self.__on_progress:
self.__on_progress(data)
_log.info('{0}% done...'.format(
data.get('percent')))
elif message.type == gst.MESSAGE_EOS:
_log.info('Done')
self.halt()
def halt(self):
if getattr(self, 'pipeline', False):
self.pipeline.set_state(gst.STATE_NULL)
del self.pipeline
_log.info('Quitting MainLoop gracefully...')
gobject.idle_add(self._loop.quit)
if __name__ == '__main__':
import sys
logging.basicConfig()
_log.setLevel(logging.INFO)
#transcoder = AudioTranscoder()
#data = transcoder.discover(sys.argv[1])
#res = transcoder.transcode(*sys.argv[1:3])
thumbnailer = AudioThumbnailer()
thumbnailer.spectrogram(*sys.argv[1:], width=640)
pdb.set_trace()

4
mediagoblin/media_types/image/__init__.py
View File

@@ -14,13 +14,15 @@
# 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/>.
from mediagoblin.media_types.image.processing import process_image
from mediagoblin.media_types.image.processing import process_image, \
sniff_handler
MEDIA_MANAGER = {
"human_readable": "Image",
"processor": process_image, # alternately a string,
# 'mediagoblin.media_types.image.processing'?
"sniff_handler": sniff_handler,
"display_template": "mediagoblin/media_displays/image.html",
"default_thumb": "images/media_thumbs/image.jpg",
"accepted_extensions": ["jpg", "jpeg", "png", "gif", "tiff"]}

55
mediagoblin/media_types/image/processing.py
View File

@@ -16,14 +16,18 @@
import Image
import os
import logging
from mediagoblin import mg_globals as mgg
from mediagoblin.processing import BadMediaFail, \
create_pub_filepath, THUMB_SIZE, MEDIUM_SIZE, FilenameBuilder
create_pub_filepath, FilenameBuilder
from mediagoblin.tools.exif import exif_fix_image_orientation, \
extract_exif, clean_exif, get_gps_data, get_useful, \
exif_image_needs_rotation
_log = logging.getLogger(__name__)
def resize_image(entry, filename, new_path, exif_tags, workdir, new_size,
size_limits=(0, 0)):
"""Store a resized version of an image and return its pathname.
@@ -35,18 +39,13 @@ def resize_image(entry, filename, new_path, exif_tags, workdir, new_size,
exif_tags -- EXIF data for the original image
workdir -- directory path for storing converted image files
new_size -- 2-tuple size for the resized image
size_limits (optional) -- image is only resized if it exceeds this size
"""
try:
resized = Image.open(filename)
except IOError:
raise BadMediaFail()
resized = exif_fix_image_orientation(resized, exif_tags) # Fix orientation
if ((resized.size[0] > size_limits[0]) or
(resized.size[1] > size_limits[1])):
resized.thumbnail(new_size, Image.ANTIALIAS)
resized.thumbnail(new_size, Image.ANTIALIAS)
# Copy the new file to the conversion subdir, then remotely.
tmp_resized_filename = os.path.join(workdir, new_path[-1])
@@ -54,6 +53,33 @@ def resize_image(entry, filename, new_path, exif_tags, workdir, new_size,
resized.save(resized_file)
mgg.public_store.copy_local_to_storage(tmp_resized_filename, new_path)
SUPPORTED_FILETYPES = ['png', 'gif', 'jpg', 'jpeg']
def sniff_handler(media_file, **kw):
if kw.get('media') is not None: # That's a double negative!
name, ext = os.path.splitext(kw['media'].filename)
clean_ext = ext[1:].lower() # Strip the . from ext and make lowercase
_log.debug('name: {0}\next: {1}\nlower_ext: {2}'.format(
name,
ext,
clean_ext))
if clean_ext in SUPPORTED_FILETYPES:
_log.info('Found file extension in supported filetypes')
return True
else:
_log.debug('Media present, extension not found in {0}'.format(
SUPPORTED_FILETYPES))
else:
_log.warning('Need additional information (keyword argument \'media\')'
' to be able to handle sniffing')
return False
def process_image(entry):
"""
Code to process an image
@@ -77,19 +103,24 @@ def process_image(entry):
thumb_filepath = create_pub_filepath(
entry, name_builder.fill('{basename}.thumbnail{ext}'))
resize_image(entry, queued_filename, thumb_filepath,
exif_tags, conversions_subdir, THUMB_SIZE)
exif_tags, conversions_subdir,
(mgg.global_config['media:thumb']['max_width'],
mgg.global_config['media:thumb']['max_height']))
# If the size of the original file exceeds the specified size of a `medium`
# file, a `.medium.jpg` files is created and later associated with the media
# entry.
medium = Image.open(queued_filename)
if medium.size[0] > MEDIUM_SIZE[0] or medium.size[1] > MEDIUM_SIZE[1] \
or exif_image_needs_rotation(exif_tags):
if medium.size[0] > mgg.global_config['media:medium']['max_width'] \
or medium.size[1] > mgg.global_config['media:medium']['max_height'] \
or exif_image_needs_rotation(exif_tags):
medium_filepath = create_pub_filepath(
entry, name_builder.fill('{basename}.medium{ext}'))
resize_image(
entry, queued_filename, medium_filepath,
exif_tags, conversions_subdir, MEDIUM_SIZE, MEDIUM_SIZE)
exif_tags, conversions_subdir,
(mgg.global_config['media:medium']['max_width'],
mgg.global_config['media:medium']['max_height']))
else:
medium_filepath = None
@@ -99,7 +130,7 @@ def process_image(entry):
with queued_file:
original_filepath = create_pub_filepath(
entry, name_builder.fill('{basename}{ext}') )
entry, name_builder.fill('{basename}{ext}'))
with mgg.public_store.get_file(original_filepath, 'wb') \
as original_file:

12
mediagoblin/media_types/video/__init__.py
View File

@@ -14,16 +14,16 @@
# 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/>.
from mediagoblin.media_types.video.processing import process_video
from mediagoblin.media_types.video.processing import process_video, \
sniff_handler
MEDIA_MANAGER = {
"human_readable": "Video",
"processor": process_video, # alternately a string,
# 'mediagoblin.media_types.image.processing'?
"processor": process_video, # alternately a string,
# 'mediagoblin.media_types.image.processing'?
"sniff_handler": sniff_handler,
"display_template": "mediagoblin/media_displays/video.html",
"default_thumb": "images/media_thumbs/video.jpg",
# TODO: This list should be autogenerated based on gst plugins
"accepted_extensions": [
"mp4", "mov", "webm", "avi", "3gp", "3gpp", "mkv", "ogv", "ogg",
"m4v"]}
"mp4", "mov", "webm", "avi", "3gp", "3gpp", "mkv", "ogv", "m4v"]}

33
mediagoblin/media_types/video/processing.py
View File

@@ -20,7 +20,7 @@ import os
from mediagoblin import mg_globals as mgg
from mediagoblin.processing import mark_entry_failed, \
THUMB_SIZE, MEDIUM_SIZE, create_pub_filepath, FilenameBuilder
create_pub_filepath, FilenameBuilder
from . import transcoders
logging.basicConfig()
@@ -29,17 +29,27 @@ _log = logging.getLogger(__name__)
_log.setLevel(logging.DEBUG)
def sniff_handler(media_file, **kw):
transcoder = transcoders.VideoTranscoder()
data = transcoder.discover(media_file.name)
_log.debug('Discovered: {0}'.format(data))
if not data:
_log.error('Could not discover {0}'.format(
kw.get('media')))
return False
if data['is_video'] == True:
return True
return False
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.
Process a video entry, transcode the queued media files (originals) and
create a thumbnail for the entry.
"""
video_config = mgg.global_config['media_type:mediagoblin.media_types.video']
@@ -62,7 +72,8 @@ def process_video(entry):
with tmp_dst:
# Transcode queued file to a VP8/vorbis file that fits in a 640x640 square
transcoder = transcoders.VideoTranscoder(queued_filename, tmp_dst.name)
transcoder = transcoders.VideoTranscoder()
transcoder.transcode(queued_filename, tmp_dst.name)
# Push transcoded video to public storage
_log.debug('Saving medium...')

82
mediagoblin/media_types/video/transcoders.py
View File

@@ -21,12 +21,9 @@ os.putenv('GST_DEBUG_DUMP_DOT_DIR', '/tmp')
import sys
import logging
import pdb
import urllib
_log = logging.getLogger(__name__)
logging.basicConfig()
_log.setLevel(logging.DEBUG)
CPU_COUNT = 2
try:
@@ -38,17 +35,16 @@ try:
pass
except ImportError:
_log.warning('Could not import multiprocessing, defaulting to 2 CPU cores')
pass
try:
import gtk
except:
except ImportError:
raise Exception('Could not find pygtk')
try:
import gobject
gobject.threads_init()
except:
except ImportError:
raise Exception('gobject could not be found')
try:
@@ -56,7 +52,7 @@ try:
pygst.require('0.10')
import gst
from gst.extend import discoverer
except:
except ImportError:
raise Exception('gst/pygst 0.10 could not be found')
@@ -270,7 +266,7 @@ class VideoThumbnailer:
return 0
try:
return pipeline.query_duration(gst.FORMAT_TIME)[0]
return pipeline.query_duration(gst.FORMAT_TIME)[0]
except gst.QueryError:
return self._get_duration(pipeline, retries + 1)
@@ -320,12 +316,11 @@ class VideoThumbnailer:
self.bus.disconnect(self.watch_id)
self.bus = None
def __halt_final(self):
_log.info('Done')
if self.errors:
_log.error(','.join(self.errors))
self.loop.quit()
@@ -341,10 +336,15 @@ class VideoTranscoder:
that it was refined afterwards and therefore is done more
correctly.
'''
def __init__(self, src, dst, **kwargs):
def __init__(self):
_log.info('Initializing VideoTranscoder...')
self.loop = gobject.MainLoop()
def transcode(self, src, dst, **kwargs):
'''
Transcode a video file into a 'medium'-sized version.
'''
self.source_path = src
self.destination_path = dst
@@ -358,6 +358,34 @@ class VideoTranscoder:
self._setup()
self._run()
def discover(self, src):
'''
Discover properties about a media file
'''
_log.info('Discovering {0}'.format(src))
self.source_path = src
self._setup_discover(discovered_callback=self.__on_discovered)
self.discoverer.discover()
self.loop.run()
if hasattr(self, '_discovered_data'):
return self._discovered_data.__dict__
else:
return None
def __on_discovered(self, data, is_media):
_log.debug('Discovered: {0}'.format(data))
if not is_media:
self.__stop()
raise Exception('Could not discover {0}'.format(self.source_path))
self._discovered_data = data
self.__stop_mainloop()
def _setup(self):
self._setup_discover()
self._setup_pipeline()
@@ -370,12 +398,14 @@ class VideoTranscoder:
_log.debug('Initializing MainLoop()')
self.loop.run()
def _setup_discover(self):
def _setup_discover(self, **kw):
_log.debug('Setting up discoverer')
self.discoverer = discoverer.Discoverer(self.source_path)
# Connect self.__discovered to the 'discovered' event
self.discoverer.connect('discovered', self.__discovered)
self.discoverer.connect(
'discovered',
kw.get('discovered_callback', self.__discovered))
def __discovered(self, data, is_media):
'''
@@ -422,7 +452,7 @@ class VideoTranscoder:
self.ffmpegcolorspace = gst.element_factory_make(
'ffmpegcolorspace', 'ffmpegcolorspace')
self.pipeline.add(self.ffmpegcolorspace)
self.videoscale = gst.element_factory_make('ffvideoscale', 'videoscale')
#self.videoscale.set_property('method', 2) # I'm not sure this works
#self.videoscale.set_property('add-borders', 0)
@@ -516,7 +546,6 @@ class VideoTranscoder:
# Setup the message bus and connect _on_message to the pipeline
self._setup_bus()
def _on_dynamic_pad(self, dbin, pad, islast):
'''
Callback called when ``decodebin2`` has a pad that we can connect to
@@ -561,11 +590,11 @@ class VideoTranscoder:
t = message.type
if t == gst.MESSAGE_EOS:
if message.type == gst.MESSAGE_EOS:
self._discover_dst_and_stop()
_log.info('Done')
elif t == gst.MESSAGE_ELEMENT:
elif message.type == gst.MESSAGE_ELEMENT:
if message.structure.get_name() == 'progress':
data = dict(message.structure)
@@ -587,7 +616,6 @@ class VideoTranscoder:
self.dst_discoverer.discover()
def __dst_discovered(self, data, is_media):
self.dst_data = data
@@ -596,8 +624,9 @@ class VideoTranscoder:
def __stop(self):
_log.debug(self.loop)
# Stop executing the pipeline
self.pipeline.set_state(gst.STATE_NULL)
if hasattr(self, 'pipeline'):
# Stop executing the pipeline
self.pipeline.set_state(gst.STATE_NULL)
# This kills the loop, mercifully
gobject.idle_add(self.__stop_mainloop)
@@ -615,14 +644,15 @@ class VideoTranscoder:
if __name__ == '__main__':
os.nice(19)
logging.basicConfig()
from optparse import OptionParser
parser = OptionParser(
usage='%prog [-v] -a [ video | thumbnail ] SRC DEST')
usage='%prog [-v] -a [ video | thumbnail | discover ] SRC [ DEST ]')
parser.add_option('-a', '--action',
dest='action',
help='One of "video" or "thumbnail"')
help='One of "video", "discover" or "thumbnail"')
parser.add_option('-v',
dest='verbose',
@@ -646,13 +676,17 @@ if __name__ == '__main__':
_log.debug(args)
if not len(args) == 2:
if not len(args) == 2 and not options.action == 'discover':
parser.print_help()
sys.exit()
transcoder = VideoTranscoder()
if options.action == 'thumbnail':
VideoThumbnailer(*args)
elif options.action == 'video':
def cb(data):
print('I\'m a callback!')
transcoder = VideoTranscoder(*args, progress_callback=cb)
transcoder.transcode(*args, progress_callback=cb)
elif options.action == 'discover':
print transcoder.discover(*args).__dict__