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diff --git a/Game/Code/lib/ffmpeg/MATHEMATICS.pas b/Game/Code/lib/ffmpeg/MATHEMATICS.pas
new file mode 100644
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+++ b/Game/Code/lib/ffmpeg/MATHEMATICS.pas
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+unit MATHEMATICS;
+
+interface
+
+(*
+ * copyright (c) 2005 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *)
+
+(* This is a part of Pascal porting of ffmpeg.  Originally by Victor Zinetz for Delphi and Free Pascal on Windows.
+For Mac OS X, some modifications were made by The Creative CAT, denoted as CAT
+in the source codes *)
+ 
+{$MODE DELPHI} (* CAT *)
+{$PACKENUM 4}    (* every enum type variables uses 4 bytes, CAT *)
+{$PACKRECORDS C}    (* GCC compatible, Record Packing, CAT *)
+
+uses
+  rational; (* CAT *)
+
+const
+  av__util = 'libavutil.49'; (* CAT *)
+
+type
+  TAVRounding = (
+    AV_ROUND_ZERO     = 0, ///< round toward zero
+    AV_ROUND_INF      = 1, ///< round away from zero
+    AV_ROUND_DOWN     = 2, ///< round toward -infinity
+    AV_ROUND_UP       = 3, ///< round toward +infinity
+    AV_ROUND_NEAR_INF = 5, ///< round to nearest and halfway cases away from zero
+    AV_ROUND_FUCKING = $FFFFFF
+  );
+
+(** * rescale a 64bit integer with rounding to nearest.
+ * a simple a*b/c isn't possible as it can overflow *)
+function av_rescale (a, b, c: int64): int64;
+  cdecl; external av__util;
+
+(**
+ * rescale a 64bit integer with specified rounding.
+ * a simple a*b/c isn't possible as it can overflow *)
+function av_rescale_rnd (a, b, c: int64; enum: TAVRounding): int64;
+  cdecl; external av__util;
+
+(**
+ * rescale a 64bit integer by 2 rational numbers. *)
+function av_rescale_q (a: int64; bq, cq: TAVRational): int64;
+  cdecl; external av__util;
+
+implementation
+
+end.
+