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1 # -*- Mode: Python -*- 2 # vi:si:et:sw=4:sts=4:ts=4 3 4 # Flumotion - a streaming media server 5 # Copyright (C) 2004,2005,2006,2007,2008,2009 Fluendo, S.L. 6 # Copyright (C) 2010,2011 Flumotion Services, S.A. 7 # All rights reserved. 8 # 9 # This file may be distributed and/or modified under the terms of 10 # the GNU Lesser General Public License version 2.1 as published by 11 # the Free Software Foundation. 12 # This file is distributed without any warranty; without even the implied 13 # warranty of merchantability or fitness for a particular purpose. 14 # See "LICENSE.LGPL" in the source distribution for more information. 15 # 16 # Headers in this file shall remain intact. 17 18 import gettext 19 import os 20 21 from zope.interface import implements 22 23 from flumotion.admin.assistant.interfaces import IEncoderPlugin 24 from flumotion.admin.assistant.models import VideoEncoder 25 from flumotion.common.fraction import fractionAsFloat 26 from flumotion.admin.gtk.basesteps import VideoEncoderStep 27 28 __version__ = "$Rev$" 29 _ = gettext.gettext 30 3133 """ 34 @ivar framerate: number of frames per second; to be set by view 35 @type framerate: float 36 """ 37 componentType = 'theora-encoder' 3873 7440 super(TheoraVideoEncoder, self).__init__() 41 self.has_quality = False 42 self.has_bitrate = True 43 self.framerate = 25.0 44 45 self.properties.keyframe_delta = 2.0 46 self.properties.bitrate = 400 47 self.properties.quality = 16 48 self.properties.speed = 34951 properties = super(TheoraVideoEncoder, self).getProperties() 52 if self.has_bitrate: 53 del properties.quality 54 properties.bitrate *= 1000 55 elif self.has_quality: 56 del properties.bitrate 57 else: 58 raise AssertionError 59 60 # convert the human-friendly delta to maxdistance 61 # FIXME: I think the theora-encoder component should not expose 62 # the theora element properties directly, but just have keyframe-delta 63 # directly and calculate GStreamer element properties. But that's a 64 # property change. 65 properties.keyframe_maxdistance = int(properties.keyframe_delta * 66 self.framerate) 67 del properties.keyframe_delta 68 69 self.debug('keyframe_maxdistance: %r', 70 properties.keyframe_maxdistance) 71 72 return properties76 name = 'TheoraEncoder' 77 title = _('Theora Encoder') 78 sidebarName = _('Theora') 79 gladeFile = os.path.join(os.path.dirname(os.path.abspath(__file__)), 80 'wizard.glade') 81 componentType = 'theora' 82 icon = 'xiphfish.png' 83 docSection = 'help-configuration-assistant-encoder-theora' 84 docAnchor = '' 85 docVersion = 'local' 86 87 # WizardStep 88123 124 # Callbacks 125 133 134 14490 self.bitrate.data_type = int 91 self.quality.data_type = int 92 self.keyframe_delta.data_type = float 93 self.speed_type = int 94 self.has_quality.data_type = bool 95 self.has_bitrate.data_type = bool 96 97 self.add_proxy(self.model, 98 ['has_quality', 'has_bitrate']) 99 self.add_proxy(self.model.properties, 100 ['bitrate', 'quality', 'keyframe_delta', 'speed']) 101 102 # we specify keyframe_delta in seconds, but theora expects 103 # a number of frames, so we need the framerate and calculate 104 # we need to go through the Step (which is the view) because models 105 # don't have references to other models 106 producer = self.wizard.getScenario().getVideoProducer(self.wizard) 107 self.model.framerate = fractionAsFloat(producer.getFramerate()) 108 self.debug('Framerate of video producer: %r' % self.model.framerate) 109 step = 1 / self.model.framerate 110 page = 1.0 111 self.keyframe_delta.set_increments(step, page)112114 self.model.worker = worker 115 116 def hasTheora(unused, worker): 117 self.wizard.runInWorker( 118 worker, 'flumotion.worker.checks.encoder', 'checkTheora')119 120 self.wizard.debug('running Theora checks') 121 d = self.wizard.requireElements(worker, 'theoraenc') 122 d.addCallback(hasTheora, worker)
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