# -*- coding: utf-8 -*-
#
# Copyright (c) 2010 Paul Brossier <piem@piem.org>
# Copyright (c) 2010 Guillaume Pellerin <yomguy@parisson.com>
# This file is part of TimeSide.
# 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 timeside.core import implements, interfacedoc
from timeside.core.encoder import GstEncoder
from timeside.core.api import IEncoder
[docs]class WebMEncoder(GstEncoder):
"""WebM encoder based on Gstreamer"""
implements(IEncoder)
def __init__(self, output, streaming=False, overwrite=False, video=False):
super(WebMEncoder, self).__init__(output, streaming, overwrite)
self.video = video
[docs] @interfacedoc
def setup(self, channels=None, samplerate=None, blocksize=None,
totalframes=None):
super(WebMEncoder, self).setup(channels, samplerate, blocksize,
totalframes)
from numpy import ceil
framerate = 30
num_buffers = ceil(self.mediainfo()['duration'] *
framerate).astype(int)
self.pipe = ''
if self.video:
self.pipe += '''videotestsrc pattern=black num_buffers=%d ! videoconvert ! queue ! vp8enc ! queue ! mux.
''' % num_buffers
self.pipe += '''
appsrc name=src ! queue ! audioconvert ! vorbisenc quality=0.9 ! queue ! mux.
webmmux streamable=true name=mux
'''
if self.filename and self.streaming:
self.pipe += ''' ! tee name=t
! queue ! filesink location=%s
t. ! queue ! appsink name=app sync=False
''' % self.filename
elif self.filename:
self.pipe += '! filesink location=%s async=False sync=False ' % self.filename
else:
self.pipe += '! queue ! appsink name=app sync=False '
self.start_pipeline(channels, samplerate)
[docs] @staticmethod
@interfacedoc
def id():
return "webm_encoder"
[docs] @staticmethod
@interfacedoc
def version():
return "1.0"
[docs] @staticmethod
@interfacedoc
def file_extension():
return "webm"
[docs] @staticmethod
@interfacedoc
def mime_type():
return "video/webm"
if __name__ == "__main__":
import doctest
doctest.testmod()