Source Code for Module conduit.datatypes.Video

 1  import conduit 
 2  import conduit.datatypes.File as File 
 3   
 4  #The preset encodings must be robust. That means, in the case of ffmpeg, 
 5  #you must be explicit with the options, otherwise it tries to retain sample 
 6  #rates between the input and output files, leading to invalid rates in the output 
 7  PRESET_ENCODINGS = { 
 8      "divx":{"vcodec":"mpeg4","acodec":"ac3","arate":44100,"abitrate":"64k","format":"avi","vtag":"DIVX","file_extension":"avi", "fps":15}, 
 9      #breaks on single channel audio files because ffmpeg vorbis encoder only suuport stereo 
10      "ogg":{"vcodec":"theora","acodec":"vorbis","format":"ogg","file_extension":"ogg"}, 
11      #needs mencoder or ffmpeg compiled with mp3 support 
12      "flv":{"arate":22050,"abitrate":32,"format":"flv","acodec":"mp3","mencoder":True,"file_extension":"flv"}    
13      } 
14   
15 -def mimetype_is_video(mimetype): 
16      """ 
17      @returns: True if the given mimetype string represents a video file 
18      """ 
19      if mimetype.startswith("video/"): 
20          return True 
21      elif mimetype == "application/ogg": 
22          return True 
23      else: 
24          return False 
25   
26 -class Video(File.File): 
27   
28      _name_ = "file/video" 
29   
30 -    def __init__(self, URI, **kwargs): 
31          File.File.__init__(self, URI, **kwargs) 
32          self._title = None 
33          self._description = None 
34   
35 -    def get_video_duration(self): 
36          return None 
37   
38 -    def get_video_size(self): 
39          return None,None 
40   
41 -    def get_description(self): 
42          """ 
43          @returns: the video's description 
44          """ 
45          return self._description 
46   
47 -    def set_description(self, description): 
48          self._description = description 
49           
50 -    def __getstate__(self): 
51          data = File.File.__getstate__(self) 
52          data["description"] = self._description 
53          return data 
54   
55 -    def __setstate__(self, data): 
56          self.pb = None 
57          self._description = data["description"] 
58          File.File.__setstate__(self, data) 
59