[xiph-commits] r7299 - trunk/py-ogg2/examples

[arc at dactyl.lonelymoon.com]

Author: arc
Date: Fri Jul 23 19:33:50 2004
New Revision: 7299

Added:
trunk/py-ogg2/examples/reserializer.py
Log:
Here's a really nifty tool.  Started out as test code to make sure my
changes to libogg2 were sound, but it's a tool the community has been
needing for a long time.  Can be easily modified for py-shout source
clients, automated stream archive repair tools, etc.



Added: trunk/py-ogg2/examples/reserializer.py
===================================================================
--- trunk/py-ogg2/examples/reserializer.py	2004-07-24 00:56:05 UTC (rev 7298)
+++ trunk/py-ogg2/examples/reserializer.py	2004-07-24 02:33:47 UTC (rev 7299)
@@ -0,0 +1,42 @@
+'''
+  function: Ogg ReSerializer
+  last mod: $Id: reserializer.py
+
+This is a useful tool for changing the serial number of an Ogg stream.
+Why is it useful?  Because you can't chain two logical streams together
+in the same physical stream which have the same serial numbers.
+
+'''
+
+import ogg2
+import random
+
+infilename = raw_input('Input File: ')
+outfilename = raw_input('Output File: ')
+
+inf=open(infilename, 'r')
+otf=open(outfilename, 'w')
+
+syncin=ogg2.OggSyncState()
+syncout=ogg2.OggSyncState()
+
+serials = {}
+
+while 1: # While there's data to input
+  if syncin.input(inf) == 0 : break
+  while 1: # While there are pages to output
+    page = syncin.pageout()
+    if page==None : break
+    if page.bos :
+      serials[page.serialno] = int(random.random()*2147483647)
+      print 'ReSerializing stream %d to %d' % (page.serialno,
+                                               serials[page.serialno])
+    if serials.has_key(page.serialno) :
+      page.serialno = serials[page.serialno]
+      syncout.pagein(page)
+      while 1:
+        if syncout.output(otf) == 0 : break
+    else :
+      print 'Headless stream %d found, skipping' % page.serialno
+
+print "Done."