diff -p -up StepMania-3.9-src/src/arch/MovieTexture/MovieTexture_FFMpeg.cpp.avcodec_namespace StepMania-3.9-src/src/arch/MovieTexture/MovieTexture_FFMpeg.cpp
--- StepMania-3.9-src/src/arch/MovieTexture/MovieTexture_FFMpeg.cpp.avcodec_namespace	2008-04-10 17:36:04.000000000 +0200
+++ StepMania-3.9-src/src/arch/MovieTexture/MovieTexture_FFMpeg.cpp	2008-04-10 17:38:55.000000000 +0200
@@ -24,7 +24,9 @@ namespace avcodec
 #if defined(_WIN32)
 #include "ffmpeg/include/ffmpeg/avformat.h"
 #else
+extern "C" {
 #include <ffmpeg/avformat.h>
+};
 #endif
 };