diff --git a/build-ffmpeg.sh b/build-ffmpeg.sh
new file mode 100755
index 0000000..fac9bc6
--- /dev/null
+++ b/build-ffmpeg.sh
@@ -0,0 +1,104 @@
+#!/bin/bash
+
+SYSROOT_iPHONE="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.1.sdk"
+SYSROOT_SIMULATOR="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.1.sdk"
+CC_IPHONE="xcrun -sdk iphoneos clang"
+CC_SIMULATOR="xcrun -sdk iphonesimulator clang"
+function build_one {
+    ./configure \
+        --prefix=$PREFIX \
+        --disable-ffmpeg \
+        --disable-ffplay \
+        --disable-ffprobe \
+        --disable-ffserver \
+        --disable-armv5te \
+        --disable-armv6 \
+        --disable-doc \
+        --disable-everything \
+        --disable-debug \
+        --enable-decoder=h264 \
+        --enable-avresample \
+        --enable-cross-compile \
+        --sysroot=$SYSROOT \
+        --target-os=darwin \
+        --cc="$CC" \
+        --extra-cflags="$CFLAGS" \
+        --extra-ldflags="$LDFLAGS" \
+        --enable-pic \
+        $ADDI_FLAGS
+    make clean && make -j4 && make install
+}
+
+
+# armv7
+function build_armv7 {
+    PREFIX="armv7"
+    SYSROOT=$SYSROOT_iPHONE
+    CC=$CC_IPHONE
+    CFLAGS="-arch armv7 -mfpu=neon -miphoneos-version-min=7.1 -fpic"
+    LDFLAGS="-arch armv7 -isysroot $SYSROOT_iPHONE -miphoneos-version-min=7.1"
+    ADDI_FLAGS="--arch=arm --cpu=cortex-a9"
+    build_one
+}
+
+# armv7s
+function build_armv7s {
+    PREFIX="armv7s"
+    SYSROOT=$SYSROOT_iPHONE
+    CC=$CC_IPHONE
+    CFLAGS="-arch armv7s -mfpu=neon -miphoneos-version-min=7.1"
+    LDFLAGS="-arch armv7s -isysroot $SYSROOT_iPHONE -miphoneos-version-min=7.1"
+    ADDI_FLAGS="--arch=arm --cpu=cortex-a9"
+    build_one
+}
+
+# i386
+function build_i386 {
+    PREFIX="i386"
+    SYSROOT=$SYSROOT_SIMULATOR
+    CC=$CC_SIMULATOR
+    CFLAGS="-arch i386"
+    LDFLAGS="-arch i386 -isysroot $SYSROOT_SIMULATOR -mios-simulator-version-min=7.1"
+    ADDI_FLAGS="--arch=i386 --cpu=i386 --disable-asm"
+    build_one
+}
+
+
+# create fat library
+function build_universal {
+    cd armv7/lib
+    for file in *.a
+    do
+        cd ../..
+        xcrun -sdk iphoneos lipo -output universal/lib/$file  -create \
+        -arch armv7 armv7/lib/$file \
+        -arch armv7s armv7s/lib/$file \
+        -arch i386 i386/lib/$file
+        echo "Universal $file created."
+        cd -
+    done
+    cd ../..
+}
+
+echo "FFmpeg directory?"
+read SOURCE
+
+cd $SOURCE
+
+if [ "$1" = "clean" ]
+    then
+        rm -r armv7 armv7s i386 universal
+        make clean
+        exit 0
+fi
+mkdir armv7
+mkdir armv7s
+mkdir i386
+mkdir -p universal/lib
+
+build_armv7
+build_armv7s
+build_i386
+build_universal
+echo "Ouput files in $SOURCE/armv7 $SOURCE/armv7s $SOURCE/i386 $SOURCE/universal"
+