ffmpeg 编译IOS静态库

我使用的配置：xcode4.5,IOS6.0,ipad 1(4.3)

一、准备资源

1. 到https://github.com/gabriel/ffmpeg-iphone-build下载ffmpeg-iphone-build
2.先将gas-preprocessor.pl拷贝到/usr/sbin/目录中。
3.到这里下载最新的ffmpeg:http://ffmpeg.org/download.html 或者命令行安装：git clone git://source.ffmpeg.org/ffmpeg.git ffmpeg

二、编译

4.然后到命令行下到ffmpeg的目录下，执行：

下面的命令中，在mac10.8系统下把/Developer/Platforms/iPhoneOS.platform/这样的路径替换成/Applications/Xcode4_5.app/Contents/Developer/Platforms/iPhoneOS.platform/，也就是xcode安装路径。

./configure \

--cc=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc \

--as='gas-preprocessor.pl /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' \

--sysroot=/Applications/Xcode4_4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk \

--extra-ldflags=-L/Applications/Xcode4_4.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk/usr/lib/system \

--target-os=darwin \

--arch=arm \

--cpu=cortex-a8 \

--extra-cflags='-arch armv7' \

--extra-ldflags='-arch armv7' \

--enable-pic \

--enable-cross-compile \

--enable-ffmpeg \

--disable-ffplay \

--disable-ffserver \

--disable-asm \

--disable-doc \

--disable-encoders \

--disable-debug

//

./configure --cc=/Applications/Xcode4_5.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc --as='gas-preprocessor.pl /Applications/Xcode4_5.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' --sysroot=/Applications/Xcode4_5.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk --extra-ldflags=-L/Applications/Xcode4_5.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk/usr/lib/system --target-os=darwin --arch=arm --cpu=cortex-a8 --extra-cflags='-arch armv7' --extra-ldflags='-arch armv7' --enable-pic --enable-cross-compile --enable-ffmpeg --disable-ffplay --disable-ffserver --disable-asm --disable-doc --disable-encoders

//精简

./configure --cc=/Applications/Xcode4_5.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc --as='gas-preprocessor.pl /Applications/Xcode4_5.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc' --sysroot=/Applications/Xcode4_5.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk --extra-ldflags=-L/Applications/Xcode4_5.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk/usr/lib/system --target-os=darwin --arch=arm --cpu=cortex-a8 --extra-cflags='-arch armv7' --extra-ldflags='-arch armv7' --enable-cross-compile --disable-pic --disable-encoders --disable-decoders --disable-muxers --disable-demuxers --disable-debug --disable-doc --disable-asm --disable-ffserver --disable-ffplay --disable-avfilter --disable-avdevice --enable-decoder=mpeg4 --enable-decoder=aac --enable-decoder=h264 --enable-demuxer=mpegvideo --enable-demuxer=mov

5.执行sudo make,如果给代码做了修改，就先sudo make clean

6.执行sudo make install

三、使用

7.在你的工程根目录下创建一个叫ffmpeg的文件夹,把/usr/local/lib和/usr/local/include放进去

8.工程中设置header search path :"$(SRCROOT)/ffmpeg/include",library search path:"$(SRCROOT)/ffmpeg/lib"

9.添加libbz2.1.0和libz.1.2.5引用

网上实例：https://github.com/lajos/iFrameExtractor