Multiplex support fixes; basic functions test OK on single stream files  now, time to test chains and multiplexing.
Multiplex support fixes; basic functions test OK on single stream files 
now, time to test chains and multiplexing.



git-svn-id: 03f0f1727258f1959b7b485b30a676bafdb78148@13214 0101bb08-14d6-0310-b084-bc0e0c8e3800

soundcloud/vorbis,soundcloud/vorbis,fcoulombe/vorbis,fcoulombe/vorbis,fcoulombe/vorbis,soundcloud/vorbis,fcoulombe/vorbis