diff -urp -x .svn ../ffmpeg_orig/libavformat/asfdec.c ./libavformat/asfdec.c
--- ../ffmpeg_orig/libavformat/asfdec.c	2009-04-23 16:43:08.000000000 +0400
+++ ./libavformat/asfdec.c	2009-04-23 16:44:40.000000000 +0400
@@ -29,7 +29,9 @@
 void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
 
 #undef NDEBUG
-#include <assert.h>
+//#include <assert.h>
+#undef assert
+#define assert(e)	{if (!(e)) {av_log(NULL, AV_LOG_ERROR, "assert failed:(%s), %s:%d\n", #e, __FILE__, __LINE__);return -1;}}
 
 #define FRAME_HEADER_SIZE 17
 // Fix Me! FRAME_HEADER_SIZE may be different.