--- source/blender/blenkernel/intern/writeffmpeg.c	2012-02-09 18:29:54.000000000 -0700
+++ source/blender/blenkernel/intern/writeffmpeg.c	2012-02-09 18:29:05.000000000 -0700
@@ -44,6 +44,8 @@
 #include <libavutil/rational.h>
 #include <libavutil/samplefmt.h>
 #include <libswscale/swscale.h>
+#include <libavutil/mathematics.h>
+#include <libavutil/avstring.h>
 
 #include "MEM_guardedalloc.h"
 
--- intern/ffmpeg/ffmpeg_compat.h	2012-02-09 19:53:30.000000000 -0700
+++ intern/ffmpeg/ffmpeg_compat.h	2012-02-09 20:08:02.000000000 -0700
@@ -36,6 +36,7 @@
 #include <libavcodec/avcodec.h>
 #include <libavutil/rational.h>
 #include <libavutil/opt.h>
+#include <libavutil/mathematics.h>
 
 #if (LIBAVFORMAT_VERSION_MAJOR > 52) || ((LIBAVFORMAT_VERSION_MAJOR >= 52) && (LIBAVFORMAT_VERSION_MINOR >= 101))
 #define FFMPEG_HAVE_PARSE_UTILS 1

--- intern/audaspace/ffmpeg/AUD_FFMPEGWriter.cpp	2011-10-24 20:09:01.000000000 +0200
+++ intern/audaspace/ffmpeg/AUD_FFMPEGWriter.cpp	2011-11-13 12:34:01.000000000 +0100
@@ -40,6 +40,8 @@
 #include <libavcodec/avcodec.h>
 #include <libavformat/avformat.h>
 #include <libavformat/avio.h>
+#include <libavutil/mathematics.h>
+#include <libavutil/avstring.h>
 #include "ffmpeg_compat.h"
 }
 
@@ -57,10 +58,15 @@
 {
 	static const char* formats[] = { NULL, "ac3", "flac", "matroska", "mp2", "mp3", "ogg", "wav" };
 
-	if(avformat_alloc_output_context2(&m_formatCtx, NULL, formats[format], filename.c_str()))
-		AUD_THROW(AUD_ERROR_FFMPEG, context_error);
+	m_formatCtx = avformat_alloc_context();
+        if (!m_formatCtx) AUD_THROW(AUD_ERROR_FFMPEG, context_error);
 
-	m_outputFmt = m_formatCtx->oformat;
+	av_strlcpy(m_formatCtx->filename, filename.c_str(), sizeof(m_formatCtx->filename));
+	m_outputFmt = m_formatCtx->oformat = av_guess_format(formats[format], filename.c_str(), NULL);
+	if (!m_outputFmt) {
+            avformat_free_context(m_formatCtx);
+            AUD_THROW(AUD_ERROR_FFMPEG, context_error);
+        }
 
 	switch(codec)
 	{