--- mplayer.orig/libmpdemux/asf.h	2009-03-29 16:23:31.000000000 +0200
+++ mplayer/libmpdemux/asf.h	2009-03-29 16:24:03.000000000 +0200
@@ -50,7 +50,7 @@
   uint64_t unk1; // Unknown, maybe reserved ( usually contains 0 ) UINT64 8
   uint32_t type_size; //Total size of type-specific data UINT32 4
   uint32_t stream_size; //Size of stream-specific data UINT32 4
-  uint16_t flags; //Stream number UINT16 2
+  uint16_t flags; // Stream number (7 bits), reserved (8 bits), encrypted flag (1 bit) UINT16 2
   uint32_t unk2; //Unknown UINT32 4
 } ASF_stream_header_t;