Source Code for Module flumotion.component.encoders.theora.theora

 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 Fluendo, S.L. (www.fluendo.com). 
 6  # All rights reserved. 
 7   
 8  # This file may be distributed and/or modified under the terms of 
 9  # the GNU General Public License version 2 as published by 
10  # the Free Software Foundation. 
11  # This file is distributed without any warranty; without even the implied 
12  # warranty of merchantability or fitness for a particular purpose. 
13  # See "LICENSE.GPL" in the source distribution for more information. 
14   
15  # Licensees having purchased or holding a valid Flumotion Advanced 
16  # Streaming Server license may use this file in accordance with the 
17  # Flumotion Advanced Streaming Server Commercial License Agreement. 
18  # See "LICENSE.Flumotion" in the source distribution for more information. 
19   
20  # Headers in this file shall remain intact. 
21   
22  from flumotion.component import feedcomponent 
23  from flumotion.common import messages 
24   
25  from flumotion.common.messages import N_ 
26  T_ = messages.gettexter('flumotion') 
27   
28 -class Theora(feedcomponent.ParseLaunchComponent): 
29      checkTimestamp = True 
30      checkOffset = True 
31   
32 -    def do_check(self): 
33          self.debug('running Theora check') 
34          from flumotion.worker.checks import encoder 
35          d = encoder.checkTheora() 
36   
37          d.addCallback(self._checkCallback) 
38   
39          return d 
40   
41 -    def _checkCallback(self, result): 
42          for m in result.messages: 
43              self.addMessage(m) 
44   
45 -    def get_pipeline_string(self, properties): 
46          return "ffmpegcolorspace ! theoraenc name=encoder" 
47   
48 -    def configure_pipeline(self, pipeline, properties): 
49          element = pipeline.get_by_name('encoder') 
50   
51          props = ('bitrate', 
52                   'quality', 
53                   'keyframe-threshold', 
54                   'keyframe-mindistance',  
55                   ('quick-compress', 'quick'), 
56                   ('keyframe-maxdistance', 'keyframe-freq'), 
57                   ('keyframe-maxdistance', 'keyframe-force'), 
58                   'noise-sensitivity') 
59   
60          # F0.6: remove this code 
61          # before 0.3.2, bitrate was interpreted as kbps, inconsistent 
62          # with other flumotion components 
63          # safe to assume that nobody will want less than 10 kbit/sec 
64          # also, MikeS *requires* a kbit/sec to be seen as 1000 bit/sec 
65          if 'bitrate' in properties: 
66              if properties['bitrate'] < 10000: 
67                  self.addMessage( 
68                      messages.Warning(T_(N_( 
69                          "Your configuration uses 'bitrate' expressed in " 
70                          "kbit/sec.  Please convert it to a value in bit/sec by " 
71                          "multiplying the value by 1000.")), id='bitrate')) 
72                  properties['bitrate'] *= 1000 
73   
74          for p in props: 
75              pproperty = isinstance(p, tuple) and p[0] or p 
76              eproperty = isinstance(p, tuple) and p[1] or p 
77   
78              if pproperty in properties: 
79                  self.debug('Setting GStreamer property %s to %r' % ( 
80                      eproperty, properties[pproperty])) 
81                  # FIXME: GStreamer 0.10 has bitrate in kbps, inconsistent 
82                  # with all other elements, so fix it up 
83                  if pproperty == 'bitrate': 
84                      element.set_property(eproperty,  
85                          int(properties[pproperty]/1000)) 
86                  else: 
87                      element.set_property(eproperty, properties[pproperty]) 
88