diff --git a/.gitmodules b/.gitmodules
index adcac5915..2916841b5 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -25,3 +25,12 @@
 [submodule "submodules/msamr"]
 	path = submodules/msamr
 	url = git://git.linphone.org/msamr.git
+[submodule "submodules/externals/ffmpeg"]
+	path = submodules/externals/ffmpeg
+	url = git://git.videolan.org/ffmpeg
+[submodule "submodules/externals/x264"]
+	path = submodules/externals/x264
+	url = git://git.videolan.org/x264.git
+[submodule "submodules/msx264"]
+	path = submodules/msx264
+	url = git://git.linphone.org/msx264.git
diff --git a/README b/README
index c846c7a2a..edf5247c9 100644
--- a/README
+++ b/README
@@ -8,6 +8,7 @@ Linphone for iPhone depends on liblinphone sdk. To build this sdk, you must inst
 -intltool
 -wget
 -pkgconfig
+-gas-preposessor.pl  (http://github.com/yuvi/gas-preprocessor/ )
 
 Link macport libtoolize to glibtoolize (sudo ln -s /opt/local/bin/glibtoolize /opt/local/bin/libtoolize)
 
diff --git a/submodules/build/builders.d/ffmpeg.mk b/submodules/build/builders.d/ffmpeg.mk
new file mode 100644
index 000000000..7bc7cf12e
--- /dev/null
+++ b/submodules/build/builders.d/ffmpeg.mk
@@ -0,0 +1,38 @@
+ffmpeg_configure_options=\
+	--disable-mmx \
+	--enable-cross-compile \
+	--disable-ffprobe --disable-ffserver  --disable-avdevice \
+	--disable-avfilter  --disable-network \
+	--disable-everything  --enable-decoder=mpeg4 --enable-encoder=mpeg4 \
+	--enable-decoder=h264 --disable-avformat --enable-armv6 --enable-armv6t2 \
+	--enable-armvfp --enable-neon \
+	--source-path=$(BUILDER_SRC_DIR)/$(ffmpeg_dir) \
+	--cross-prefix=$$SDK_BIN_PATH/ \
+	--sysroot=$$SYSROOT_PATH --arch=$$ARCH \
+	--enable-static   --disable-shared --target-os=darwin \
+	--cpu=cortex-a8 --extra-cflags="-arch $$ARCH " --extra-ldflags="-arch $$ARCH -Wl,-syslibroot,$$SYSROOT_PATH " \
+#	--as=$(BUILDER_SRC_DIR)/externals/x264/extras/gas-preprocessor.pl
+
+#--sysinclude=PATH        location of cross-build system headers
+
+ffmpeg_dir?=externals/ffmpeg
+
+$(BUILDER_BUILD_DIR)/$(ffmpeg_dir)/Makefile: $(BUILDER_SRC_DIR)/$(ffmpeg_dir)/configure
+	mkdir -p $(BUILDER_BUILD_DIR)/$(ffmpeg_dir)
+	cd $(BUILDER_BUILD_DIR)/$(ffmpeg_dir)/ \
+	&&  host_alias=${host} . $(BUILDER_SRC_DIR)/build/$(config_site) \
+	&& $(BUILDER_SRC_DIR)/$(ffmpeg_dir)/configure --prefix=$(prefix) 	$(ffmpeg_configure_options)
+
+build-ffmpeg: $(BUILDER_BUILD_DIR)/$(ffmpeg_dir)/Makefile
+	cd $(BUILDER_BUILD_DIR)/$(ffmpeg_dir) && PKG_CONFIG_PATH=$(prefix)/lib/pkgconfig CONFIG_SITE=$(BUILDER_SRC_DIR)/build/$(config_site)  make && make install
+
+clean-ffmpeg:
+	cd  $(BUILDER_BUILD_DIR)/$(ffmpeg_dir) && make clean
+
+veryclean-ffmpeg:
+	cd $(BUILDER_BUILD_DIR)/$(ffmpeg_dir) && make distclean
+	cd $(BUILDER_SRC_DIR)/$(ffmpeg_dir) && rm -f configure
+
+clean-makefile-ffmpeg:
+	cd $(BUILDER_BUILD_DIR)/$(ffmpeg_dir) && rm -f Makefile
+
diff --git a/submodules/externals/ffmpeg b/submodules/externals/ffmpeg
new file mode 160000
index 000000000..907783f22
--- /dev/null
+++ b/submodules/externals/ffmpeg
@@ -0,0 +1 @@
+Subproject commit 907783f221ad9594a528681e30777705f11bf0b5
diff --git a/submodules/externals/x264 b/submodules/externals/x264
new file mode 160000
index 000000000..08d04a4d3
--- /dev/null
+++ b/submodules/externals/x264
@@ -0,0 +1 @@
+Subproject commit 08d04a4d30b452faed3b763528611737d994b30b
diff --git a/submodules/msx264 b/submodules/msx264
new file mode 160000
index 000000000..2e10820e9
--- /dev/null
+++ b/submodules/msx264
@@ -0,0 +1 @@
+Subproject commit 2e10820e9c32fe75f049308d69e4164b46bc0d1a