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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