IOS平台上使用FFmpeg解码H264的例子
https://github.com/lajos/iFrameExtractor
Xcode4.5 安装路径变了的缘故吧，修改了下build_armv6 build_armv7 build_i386 三个编译脚本

build_armv6

#!/bin/tcsh -f

 if (! -d armv6) mkdir armv6
 if (! -d lib) mkdir lib

 rm armv6/*.a

 make clean

 ./configure --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffserver --enable-cross-compile --arch=arm --target-os=darwin --cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc --as='gas-preprocessor/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/iPhoneOS6.0.sdk --cpu=arm1176jzf-s --extra-cflags='-arch armv6' --extra-ldflags='-arch armv6  -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk'

 make -j4

 mv libavcodec/libavcodec.a armv6/
 mv libavdevice/libavdevice.a armv6/
 mv libavformat/libavformat.a armv6/
 mv libavutil/libavutil.a armv6/
 mv libswscale/libswscale.a armv6/

 rm lib/*.a

 cp armv6/*.a lib/

 

build_armv7

#!/bin/tcsh -f

 if (! -d armv7) mkdir armv7
 if (! -d lib) mkdir lib

 rm armv7/*.a

 make clean

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

 make -j4

 mv libavcodec/libavcodec.a armv7/
 mv libavdevice/libavdevice.a armv7/
 mv libavformat/libavformat.a armv7/
 mv libavutil/libavutil.a armv7/
 mv libswscale/libswscale.a armv7/

 rm lib/*.a

 cp armv7/*.a lib/

 

build_i386

#!/bin/tcsh -f

 if (! -d i386) mkdir i386
 if (! -d lib) mkdir lib

 rm i386/*.a

 make clean

 ./configure --disable-bzlib --disable-mmx --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffserver --cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc --as="gas-preprocessor/gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc" --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk --extra-ldflags="-arch i386 -L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk/usr/lib/system" --extra-cflags="-arch i386 -fmessage-length=0 -pipe -Wno-trigraphs -fpascal-strings -O0 -fasm-blocks -Wreturn-type -Wunused-variable -D__IPHONE_OS_VERSION_MIN_REQUIRED=40000 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk -fvisibility=hidden -mmacosx-version-min=10.5 -gdwarf-2"

 make -j4

 mv libavcodec/libavcodec.a i386/
 mv libavdevice/libavdevice.a i386/
 mv libavformat/libavformat.a i386/
 mv libavutil/libavutil.a i386/
 mv libswscale/libswscale.a i386/

 rm lib/*.a

 cp i386/*.a lib/

没有真机，模拟器就使用i386编译出来的库。
用xcode打开项目，编译运行。

接下来 学习Objective-C，移植rtmpdump，能直接使用FFmpeg里的rtmp协议处理最好