FFmpeg fixed its rtsp mingw compatibility.

extras/contrib/src/Makefile

@@ -1051,9 +1051,6 @@ endif
 ifdef HAVE_DARWIN_OS
 	(cd $@; patch -p0 < ../Patches/ffmpeg-macosx-intel-mmx.patch)
 endif
-ifdef HAVE_WIN32
-	(cd $@; patch -p0 < ../Patches/ffmpeg-svn-win32.patch)
-endif
 ifdef NO_TEXT_RELOCATION
 	(cd $@; patch -p1 < ../Patches/ffmpeg-svn-mmx_removal-darwin9.patch)
 endif

extras/contrib/src/Patches/ffmpeg-svn-win32.patch

---- libavformat/rtsp_old.c	2008-03-28 21:47:00.614740700 -0400
-+++ libavformat/rtsp.c	2008-03-29 06:35:39.143600000 -0400
-@@ -1094,7 +1094,7 @@
-             goto fail;
-         protocol_mask &= ~(1 << protocol);
-         if (protocol_mask == 0 && err == 1) {
--            err = AVERROR(EPROTONOSUPPORT);
-+            err = AVERROR(AVERROR_NOTSUPP);
-             goto fail;
-         }
-     } while (err);