Xcode5编译ffmpeg

1. 命令行安装FFmpeg：git clone git://source.ffmpeg.org/ffmpeg.git ffmpeg(或：到https://github.com/gabriel/ffmpeg-iphone-build下载ffmpeg-iphone-build)

2. 安装命令行工具(Command Line Tools)

   打开终端，输入命令：xcode-select --install

   

   选择“安装”，然后同意安装协议。

   

   

3. 下载gas-preprocessor：https://github.com/mansr/gas-preprocessor， 先将gas-preprocessor.pl拷贝到/usr/sbin/目录中。

   然后修改gas-preprocessor.pl文件的权限。注:需要有读，写和执行的权限。具体操作为，首先在命令行下进入/usr/bin目录，然后执行chmod命令，如下图所示:

   

4. 运行build-ffmpeg.sh文件：

   1、cd  /build-ffmpeg.sh 脚本的所在目录下

   2、sh build-ffmpeg.sh

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   #!/bin/bash ########################################################################### #  Choose your ffmpeg version and your currently-installed iOS SDK version: # VERSION="2.0.2" SDKVERSION="7.0" # # ########################################################################### # # 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" 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-${VERSION}.tar.bz2" ]; then     echo "Downloading ffmpeg-${VERSION}.tar.bz2"     curl -LO http://ffmpeg.org/releases/ffmpeg-${VERSION}.tar.bz2 else     echo "Using ffmpeg-${VERSION}.tar.bz2" fi tar jxf ffmpeg-${VERSION}.tar.bz2 -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}/${ARCH}"     ./configure --prefix="${INTERDIR}/${ARCH}" --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-iconv --disable-bzlib --enable-avresample --sysroot="${DEVELOPER}/Platforms/${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDKVERSION}.sdk" --cc="${DEVELOPER}/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang" --as='/usr/local/bin/gas-preprocessor.pl' --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 && make install && make clean                                                                                                                              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."

5. 把/build/built/universal目录下的 lib 和 include 文件导入工程，并在header search path 配置 include文件 路径。

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