Compile FFmpeg/Libav for iOS

build-ffmpeg.sh

# configure for armv7 build
./configure \
--cc=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc \
--as='/usr/local/bin/gas-preprocessor.pl /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' \
--sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk \
--target-os=darwin \
--arch=arm \
--cpu=cortex-a8 \
--extra-cflags='-arch armv7' \
--extra-ldflags='-arch armv7 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk' \
--prefix=compiled/armv7 \
--enable-cross-compile \
--enable-nonfree \
--enable-gpl \
--enable-postproc \
--enable-avfilter \
--disable-armv5te \
--disable-ffmpeg \
--disable-ffplay \
--disable-ffserver \
--disable-ffprobe \
--disable-doc \
--disable-debug \
--disable-encoders \
--disable-muxers

# build for armv7
make clean
make && make install

# configure for armv6 build
./configure \
--cc=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc \
--as='/usr/local/bin/gas-preprocessor.pl /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' \
--sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk \
--target-os=darwin \
--arch=arm \
--cpu=arm1176jzf-s \
--extra-cflags='-arch armv6' \
--extra-ldflags='-arch armv6 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk' \
--prefix=compiled/armv6 \
--enable-cross-compile \
--enable-nonfree \
--enable-gpl \
--enable-postproc \
--enable-avfilter \
--disable-armv5te \
--disable-ffmpeg \
--disable-ffplay \
--disable-ffserver \
--disable-ffprobe \
--disable-doc \
--disable-debug \
--disable-encoders \
--disable-muxers

# build for i386
make clean
make && make install

# configure for i386 build
./configure \
--cc=/Developer/usr/bin/gcc-4.2 \
--as='/usr/local/bin/gas-preprocessor.pl /Developer/usr/bin/gcc-4.2' \
--sysroot=/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.3.sdk \
--target-os=darwin \
--arch=i386 \
--cpu=i386 \
--extra-cflags='-arch i386' \
--extra-ldflags='-arch i386 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.3.sdk' \
--prefix=compiled/i386 \
--enable-cross-compile \
--enable-nonfree \
--enable-gpl \
--enable-postproc \
--enable-avfilter \
--disable-armv5te \
--disable-ffmpeg \
--disable-ffplay \
--disable-ffserver \
--disable-ffprobe \
--disable-doc \
--disable-debug \
--disable-encoders \
--disable-muxers \
--disable-neon \
--disable-pic

# build for i386
make clean
make && make install

# make fat (universal) libs
mkdir -p ./compiled/fat/lib

lipo -output ./compiled/fat/lib/libavcodec.a  -create \
-arch armv6 ./compiled/armv6/lib/libavcodec.a \
-arch armv7 ./compiled/armv7/lib/libavcodec.a \
-arch i386 ./compiled/i386/lib/libavcodec.a

lipo -output ./compiled/fat/lib/libavdevice.a  -create \
-arch armv6 ./compiled/armv6/lib/libavdevice.a \
-arch armv7 ./compiled/armv7/lib/libavdevice.a \
-arch i386 ./compiled/i386/lib/libavdevice.a

lipo -output ./compiled/fat/lib/libavfilter.a  -create \
-arch armv6 ./compiled/armv6/lib/libavfilter.a \
-arch armv7 ./compiled/armv7/lib/libavfilter.a \
-arch i386 ./compiled/i386/lib/libavfilter.a

lipo -output ./compiled/fat/lib/libavformat.a  -create \
-arch armv6 ./compiled/armv6/lib/libavformat.a \
-arch armv7 ./compiled/armv7/lib/libavformat.a \
-arch i386 ./compiled/i386/lib/libavformat.a

lipo -output ./compiled/fat/lib/libavutil.a  -create \
-arch armv6 ./compiled/armv6/lib/libavutil.a \
-arch armv7 ./compiled/armv7/lib/libavutil.a \
-arch i386 ./compiled/i386/lib/libavutil.a

lipo -output ./compiled/fat/lib/libpostproc.a  -create \
-arch armv6 ./compiled/armv6/lib/libpostproc.a \
-arch armv7 ./compiled/armv7/lib/libpostproc.a \
-arch i386 ./compiled/i386/lib/libpostproc.a

lipo -output ./compiled/fat/lib/libswscale.a  -create \
-arch armv6 ./compiled/armv6/lib/libswscale.a \
-arch armv7 ./compiled/armv7/lib/libswscale.a \
-arch i386 ./compiled/i386/lib/libswscale.a