diff -urN mythplugins-0.22.orig/mytharchive/mytharchivehelper/main.cpp mythplugins-0.22/mytharchive/mytharchivehelper/main.cpp
--- mythplugins-0.22.orig/mytharchive/mytharchivehelper/main.cpp	2009-02-12 13:53:35.000000000 +0100
+++ mythplugins-0.22/mytharchive/mytharchivehelper/main.cpp	2009-02-12 18:00:33.000000000 +0100
@@ -39,6 +39,10 @@
 // mytharchive headers
 #include "../mytharchive/archiveutil.h"
 
+#ifndef INT64_C    // Used in ffmpeg headers to define some constants
+#define INT64_C(v)   (v ## LL)
+#endif
+
 class NativeArchive
 {
   public: