最近在研究IOS视频播放器，需要使用到ffmpeg4ios，所以整理编译过程。
需要使用到Git，Linux Shell脚本执行install-ffmpeg.sh即可。
下述Linux Shell脚本下载地址:http://ishare.iask.sina.com.cn/f/37135883.html
install-ffmpeg.sh
SRCDIR=`pwd` VERSION="1.2.1" echo "install gas-* perl script" ./install-gas.sh echo "download ffmpeg" set -e if [ ! -e ffmpeg-${VERSION}.tar.bz2 ]; then echo "Downloading ffmpeg-${VERSION}.tar.bz2" curl -O http://ffmpeg.org/releases/ffmpeg-${VERSION}.tar.bz2 else echo "Using ffmpeg-${VERSION}.tar.bz2" fi tar jxvf ffmpeg-${VERSION}.tar.bz2 echo "copy install shell script to ffmpeg" cp ./compile-*.sh "ffmpeg-${VERSION}" cd "ffmpeg-${VERSION}" if [ -d x264 ] then (cd $SRCDIR/ffmpeg-${VERSION}/x264; git pull) else git clone git://git.videolan.org/x264.git x264 fi echo "compile armv7s ..." ./compile-armv7s.sh echo "compile armv7 ..." ./compile-armv7.sh echo "compile i386 for Simulator ..." ./compile-i386.sh echo "packaging universal version ..." ./compile-universal.sh
install-gas.sh
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 +x /usr/sbin/gas-preprocessor.pl echo "install finished."
compile-armv7s.sh
SRCDIR=`pwd` SDKVERSION="6.1" cd $SRCDIR/x264 make clean CC=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc ./configure --host=arm-apple-darwin --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${SDKVERSION}.sdk --prefix=build/armv7s --extra-cflags='-arch armv7s' --extra-ldflags="-L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${SDKVERSION}.sdk/usr/lib/system -arch armv7s" --enable-pic --disable-shared --enable-static make && make install cd $SRCDIR make clean ./configure --prefix=armv7s --cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc --as='gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${SDKVERSION}.sdk --extra-ldflags=-L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${SDKVERSION}.sdk/usr/lib/system --target-os=darwin --arch=arm --cpu=cortex-a9 --extra-cflags='-I./x264/build/armv7s/include -arch armv7s' --extra-ldflags='-L./x264/build/armv7s/lib -arch armv7s' --enable-pic --enable-cross-compile --enable-gpl --enable-libx264 --disable-ffmpeg --disable-ffplay --disable-ffserver --disable-doc # build for armv7s make clean make # copy out the armv7s libs mkdir -p ./build/armv7s cp -f ./libavcodec/libavcodec.a ./build/armv7s/libavcodec.a cp -f ./libavdevice/libavdevice.a ./build/armv7s/libavdevice.a cp -f ./libavfilter/libavfilter.a ./build/armv7s/libavfilter.a cp -f ./libavformat/libavformat.a ./build/armv7s/libavformat.a cp -f ./libavutil/libavutil.a ./build/armv7s/libavutil.a cp -f ./libswscale/libswscale.a ./build/armv7s/libswscale.a
compile-armv7.sh
SRCDIR=`pwd` SDKVERSION="6.1" cd $SRCDIR/x264 make clean CC=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc ./configure --host=arm-apple-darwin --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${SDKVERSION}.sdk --prefix=build/armv7 --extra-cflags='-arch armv7' --extra-ldflags="-L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${SDKVERSION}.sdk/usr/lib/system -arch armv7" --enable-pic --disable-shared --enable-static make && make install cd $SRCDIR make clean ./configure --cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc --as='gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${SDKVERSION}.sdk --extra-ldflags=-L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${SDKVERSION}.sdk/usr/lib/system --target-os=darwin --arch=arm --cpu=cortex-a8 --extra-cflags='-I./x264/build/armv7/include -arch armv7' --extra-ldflags='-L./x264/build/armv7/lib -arch armv7' --enable-pic --enable-cross-compile --enable-gpl --enable-libx264 --disable-ffmpeg --disable-ffplay --disable-ffserver --disable-doc # build for armv7 make clean make # copy out the armv7 libs mkdir -p ./build/armv7 cp -f ./libavcodec/libavcodec.a ./build/armv7/libavcodec.a cp -f ./libavdevice/libavdevice.a ./build/armv7/libavdevice.a cp -f ./libavfilter/libavfilter.a ./build/armv7/libavfilter.a cp -f ./libavformat/libavformat.a ./build/armv7/libavformat.a cp -f ./libavutil/libavutil.a ./build/armv7/libavutil.a cp -f ./libswscale/libswscale.a ./build/armv7/libswscale.a
compile-i386.sh
SRCDIR=`pwd` SDKVERSION="6.1" cd $SRCDIR/x264 echo "compile x264 i386 ..." make clean CC=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc ./configure --host=i386-apple-darwin --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator${SDKVERSION}.sdk --prefix=build/i386 --extra-cflags='-arch i386' --extra-ldflags="-L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator${SDKVERSION}.sdk/usr/lib/system -arch i386" --enable-pic --disable-shared --enable-static --disable-asm make && make install cd $SRCDIR echo "compile ffmpeg i386 ..." make clean ./configure --cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc --as='gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc' --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator${SDKVERSION}.sdk --extra-ldflags=-L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator${SDKVERSION}.sdk/usr/lib/system --target-os=darwin --arch=i386 --cpu=i386 --extra-cflags='-I./x264/build/i386/include -arch i386' --extra-ldflags='-L./x264/build/i386/lib -arch i386' --enable-pic --enable-cross-compile --enable-gpl --enable-libx264 --disable-ffmpeg --disable-ffplay --disable-ffserver --disable-doc --disable-asm # build for i386 make clean make # copy out the i386 libs mkdir -p ./build/i386 cp -f ./libavcodec/libavcodec.a ./build/i386/libavcodec.a cp -f ./libavdevice/libavdevice.a ./build/i386/libavdevice.a cp -f ./libavfilter/libavfilter.a ./build/i386/libavfilter.a cp -f ./libavformat/libavformat.a ./build/i386/libavformat.a cp -f ./libavutil/libavutil.a ./build/i386/libavutil.a cp -f ./libswscale/libswscale.a ./build/i386/libswscale.a
compile-universal.sh
# make fat (universal) libs xcrun -sdk iphoneos lipo -output ./build/libavcodec.a -create -arch armv7s ./build/armv7s/libavcodec.a -arch armv7 ./build/armv7/libavcodec.a -arch i386 ./build/i386/libavcodec.a xcrun -sdk iphoneos lipo -output ./build/libavdevice.a -create -arch armv7s ./build/armv7s/libavdevice.a -arch armv7 ./build/armv7/libavdevice.a -arch i386 ./build/i386/libavdevice.a xcrun -sdk iphoneos lipo -output ./build/libavfilter.a -create -arch armv7s ./build/armv7s/libavfilter.a -arch armv7 ./build/armv7/libavfilter.a -arch i386 ./build/i386/libavfilter.a xcrun -sdk iphoneos lipo -output ./build/libavformat.a -create -arch armv7s ./build/armv7s/libavformat.a -arch armv7 ./build/armv7/libavformat.a -arch i386 ./build/i386/libavformat.a xcrun -sdk iphoneos lipo -output ./build/libavutil.a -create -arch armv7s ./build/armv7s/libavutil.a -arch armv7 ./build/armv7/libavutil.a -arch i386 ./build/i386/libavutil.a xcrun -sdk iphoneos lipo -output ./build/libswscale.a -create -arch armv7s ./build/armv7s/libswscale.a -arch armv7 ./build/armv7/libswscale.a -arch i386 ./build/i386/libswscale.a xcrun -sdk iphoneos lipo -output ./x264/build/libx264.a -create -arch armv7s ./x264/build/armv7s/lib/libx264.a -arch armv7 ./x264/build/armv7/lib/libx264.a -arch i386 ./x264/build/i386/lib/libx264.a
编译出来的文件为:
libavcodec.a
用于各种类型声音/图像编解码；
libavdevice.a
libavfilter.a
libavformat.a
用于各种音视频封装格式的生成和解析，包括获取解码所需信息以生成解码上下文结构
和读取音视频帧等功能；
libavutil.a
包含一些公共的工具函数；
libswscale.a
用于视频场景比例缩放、色彩映射转换；
libx264.a
开源示例iFrameExtractor
git clone git://github.com/lajos/iFrameExtractor.git
这是一个iOS下利用ffmpeg解码播放的例子。不过这个例子是利用贴图的方式来显示，效果不是很好，而且没有加入声音解码。
要想项目顺利运行需要添加支持库
Project References -> Targets -> Build Phases -> Link Binary With Librarys
- libbz.dylib
- libz.dylib
- libiconv.2.4.0.dylib
修改头文件搜索路径（头文件下载地址:http://www.ffmpeg4ios.org/releases/ffmpeg4ios-1.0-include.zip）
Project References -> Targets -> Build Settings -> Header Search Paths
修改库文件搜索路径（编译出来.a文件的路径）
Project References -> Targets -> Build Settings -> Library Search Paths