ios下编译ffmpeg：Mac OS X 10.9.2 + XCode 5.1 + iOS7.1 + ffmpeg 2.1

echo "install gas-preproccesor.pr"
git clone git://github.com/mansr/gas-preprocessor.git

echo "copy gas-preprocessor.pl to /usr/sbin"
sudo cp -f gas-preprocessor/gas-preprocessor.pl /usr/sbin/

echo "set execute right"
chmod a+rwx /usr/sbin/gas-preprocessor.pl

echo "install finished."

#!/bin/bash

###########################################################################
#  Choose your ffmpeg version and your currently-installed iOS SDK version:
#
VERSION="2.1"
SDKVERSION="7.1"

echo "install gas-* perl script"
./install-gas.sh

#
#
###########################################################################
#
# Don‘t change anything under this line!
#
###########################################################################

# No need to change this since xcode build will only compile in the
# necessary bits from the libraries we create
ARCHS="armv7 armv7s i386"
#ARCHS="i386"

DEVELOPER=`xcode-select -print-path`

cd "`dirname \"$0\"`"
REPOROOT=$(pwd)

# Where we‘ll end up storing things in the end
OUTPUTDIR="${REPOROOT}/dependencies"
mkdir -p ${OUTPUTDIR}/include
mkdir -p ${OUTPUTDIR}/lib
mkdir -p ${OUTPUTDIR}/bin


BUILDDIR="${REPOROOT}/build"
mkdir -p $BUILDDIR

# where we will keep our sources and build from.
SRCDIR="${BUILDDIR}/src"
mkdir -p $SRCDIR
# where we will store intermediary builds
INTERDIR="${BUILDDIR}/built"
mkdir -p $INTERDIR

########################################

cd $SRCDIR

# Exit the script if an error happens
set -e

if [ ! -e "${SRCDIR}/ffmpeg-${VERSION}.tar.bz2" ]; thenecho "Downloading ffmpeg-${VERSION}.tar.bz2"
    curl -LO http://ffmpeg.org/releases/ffmpeg-${VERSION}.tar.bz2
elseecho "Using ffmpeg-${VERSION}.tar.bz2"fi

tar zxf ffmpeg-${VERSION}.tar.gz -C $SRCDIR
cd "${SRCDIR}/ffmpeg-${VERSION}"

set +e # don‘t bail out of bash script if ccache doesn‘t exist
CCACHE=`which ccache`
if [ $? == "0" ]; then
    echo "Building with ccache: $CCACHE"
    CCACHE="${CCACHE} "
else
    echo "Building without ccache"
    CCACHE=""
fi
set -e # back to regular "bail out on error" mode

for ARCH in ${ARCHS}
do
    if [ "${ARCH}" == "i386" ];
    then
        PLATFORM="iPhoneSimulator"
        EXTRA_CONFIG="--arch=i386 --disable-asm --enable-cross-compile --target-os=darwin --cpu=i386"
        EXTRA_CFLAGS="-arch i386"
        EXTRA_LDFLAGS="-I${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDKVERSION}.sdk/usr/lib -mfpu=neon"
    else
        PLATFORM="iPhoneOS"
        EXTRA_CONFIG="--arch=arm --target-os=darwin --enable-cross-compile --cpu=cortex-a9 --disable-armv5te"
        EXTRA_CFLAGS="-w -arch ${ARCH} -mfpu=neon"
        EXTRA_LDFLAGS="-mfpu=neon"
    fi

    mkdir -p "${INTERDIR}/${ARCH}"
    LOG="${INTERDIR}/${ARCH}/build-ffmpeg-${VERSION}.log"

export CROSS_TOP="${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer"
export CROSS_SDK="${PLATFORM}${SDKVERSION}.sdk"
export RANLIB=${CROSS_TOP}/usr/bin/ranlib

echo "Building ffmpeg-${VERSION} for ${PLATFORM} ${SDKVERSION} ${ARCH}"
echo "Please stand by..."


    ./configure --prefix="${INTERDIR}/${ARCH}" --cc="${DEVELOPER}/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang" --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-iconv --disable-bzlib --enable-avresample --disable-armv6 \
--disable-armv6t2 --sysroot="${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDKVERSION}.sdk" --extra-cflags="${EXTRA_CFLAGS} -miphoneos-version-min=${SDKVERSION} -I${OUTPUTDIR}/include" --extra-ldflags="-arch ${ARCH} ${EXTRA_LDFLAGS} -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDKVERSION}.sdk -miphoneos-version-min=${SDKVERSION} -L${OUTPUTDIR}/lib" ${EXTRA_CONFIG} --enable-pic --extra-cxxflags="$CPPFLAGS -I${OUTPUTDIR}/include -isysroot ${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDKVERSION}.sdk"

    make -j16 && make install && make clean


#make >> "${LOG}" 2>&1
#make install >> "${LOG}" 2>&1
#make clean >> "${LOG}" 2>&1

     
done

#mkdir -p "${INTERDIR}/universal/lib"

#cd "${INTERDIR}/armv7/lib"
#for file in *.a
#do

#cd ${INTERDIR}
#xcrun -sdk iphoneos lipo -output universal/lib/$file  -create -arch armv7 armv7/lib/$file -arch armv7s armv7s/lib/$file -arch i386 i386/lib/$file
#echo "Universal $file created."

#done
#cp -r ${INTERDIR}/armv7/include ${INTERDIR}/universal/

echo "Done."

echo "create universal ..."

REPOROOT=$(pwd)

BUILDDIR="${REPOROOT}/build"

INTERDIR="${BUILDDIR}/built"

mkdir -p "${INTERDIR}/universal/lib"

cd "${INTERDIR}/armv7/lib"
for file in *.a
do

cd ${INTERDIR}
xcrun -sdk iphoneos lipo -output universal/lib/$file  -create -arch armv7 armv7/lib/$file -arch armv7s armv7s/lib/$file -arch i386 i386/lib/$file
echo "Universal $file created."

done
cp -r ${INTERDIR}/armv7/include ${INTERDIR}/universal/

echo "install finished."