remove dependancy on mpegts... just won't get audio filtering if

it doesn't exist.. (not even sure how good audio filtering is..)

[git-p4: depot-paths = "//depot/": change = 840]

dvd.py

@@ -9,7 +9,12 @@ import sets
 
 import sys
 sys.path.append('/Users/jgurney/p4/bktrau/info')
-import mpegts
+try:
+	import mpegts
+	audiofilter = lambda x, y: mpegts.DVDAudioFilter(x, y)
+except ImportError:
+	print >>sys.stderr, 'module mpegts could not be loaded, not filtering audio'
+	audiofilter = lambda x, y: x
 
 from pydvdread import *
 
@@ -105,8 +110,8 @@ class DVDChapter(VideoItem):
 		del kwargs['dvdtitle'], kwargs['chapter']
 
 		audio = self.dvdtitle.selectaudio(default_audio_lang)
-		kwargs['content'] = DVDChapterResource(mpegts.DVDAudioFilter(
-		    self.chapter, 0x80 + audio.pos))
+		kwargs['content'] = DVDChapterResource(
+		    audiofilter(self.chapter, 0x80 + audio.pos))
 		VideoItem.__init__(self, *args, **kwargs)
 
 		self.url = '%s/%s' % (self.cd.urlbase, self.id)