编译模拟器版本
1 到https://github.com/yuvi/gas-preprocessor下载gas-preprocessor.p并拷贝到/usr/sbin目录中
2 下载ffmpeg源码。
http://ffmpeg.org/download.html
https://github.com/FFmpeg/FFmpeg
3 解压源码，cd到源码目录下
4 创建文件config_i386.sh，其内容如下
#!/bin/tcsh -f set targetDir="../ffmpeg-libs/i386" if (! -d $targetDir ) mkdir $targetDir rm -f $targetDir/*.a make clean #./configure --arch=i386 --extra-cflags='-arch i386' --extra-ldflags='-arch i386' --disable-encoders --disable-debug --disable-mmx ./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' --nm="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/nm" --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk --target-os=darwin --arch=i386 --cpu=i386 --extra-cflags='-arch i386 -miphoneos-version-min=4.3 -mdynamic-no-pic' --extra-ldflags='-arch i386 -miphoneos-version-min=4.3 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk' --prefix=compiled/i386 --enable-cross-compile --enable-nonfree --enable-gpl --disable-armv5te --disable-swscale-alpha --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-asm --disable-debug make mv libavcodec/libavcodec.a $targetDir mv libavdevice/libavdevice.a $targetDir mv libavformat/libavformat.a $targetDir mv libavutil/libavutil.a $targetDir mv libswscale/libswscale.a $targetDir
5 执行config_i386.sh进行配置和编译
编译完成后，可以在$targetDir找到相应的静态库文件
编译真机版
前3步同上
第4步：创建文件config_armv7，其内容如下
#!/bin/tcsh -f set targetDir="../ffmpeg-libs/armv7" if (! -d $targetDir ) mkdir $targetDir rm -f $targetDir/*.a 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' --nm="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/nm" --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk --target-os=darwin --arch=arm --cpu=cortex-a8 --extra-cflags='-arch armv7 -miphoneos-version-min=4.3 -mdynamic-no-pic' --extra-ldflags='-arch armv7 -miphoneos-version-min=4.3 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk' --prefix=compiled/armv7 --enable-cross-compile --enable-nonfree --enable-gpl --disable-armv5te --disable-swscale-alpha --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-asm --disable-debug make mv libavcodec/libavcodec.a $targetDir mv libavformat/libavformat.a $targetDir mv libavutil/libavutil.a $targetDir mv libswscale/libswscale.a $targetDir
第5步：
执行config_armv7进行配置和编译，编译完成后可以在$targetDir找到相应的静态库文件