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先申明本機環境
dev-mini:ffmpeg devone$ sw_vers
ProductName: Mac OS X
ProductVersion: 10.9.2
BuildVersion: 13C1021
dev-mini:ffmpeg devone$ xcodebuild -version
Xcode 5.1.1
Build version 5B1008
## IOS7.1
http://ffmpeg.org/releases/ffmpeg-2.2.2.tar.bz2
sudo wget http://ffmpeg.org/releases/ffmpeg-2.2.2.tar.bz2
sudo wget https://github.com/yuvi/gas-preprocessor/blob/master/gas-preprocessor.pl
sudo cp gas-preprocessor.pl /usr/bin/
sudo chmod a+rwx /usr/bin/gas-preprocessor.pl
Xcode path
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.1.sdk/
參考編譯選項
http://www.cnblogs.com/gugupluto/p/3404512.html 特此感謝
## 這裡是模擬器I386版本編譯
## 完美通過
sudo ./configure --prefix=../i386 --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-mmx --enable-cross-compile --sysroot="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.1.sdk" --target-os=darwin --cc="/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc" --extra-cflags="-arch i386 -mfpu=neon -miphoneos-version-min=7.0" --extra-ldflags="-arch i386 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.1.sdk -miphoneos-version-min=7.0" --arch=i386 --cpu=i386 --disable-asm --disable-everything --enable-decoder=h264 --enable-decoder=rv40 --enable-decoder=aac
sudo make
sudo make install
## 編譯ffmpeg armv7（iPhone 3GS以上）
## 完美通過
sudo ./configure --prefix=../armv7 --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --enable-cross-compile --sysroot="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.1.sdk" --target-os=darwin --cc="/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc" --extra-cflags="-arch armv7" --extra-ldflags="-arch armv7" --extra-ldflags=-L/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.1.sdk/usr/lib/system --arch=arm --cpu=cortex-a8 --enable-pic --disable-asm --disable-everything --enable-decoder=h264 --enable-decoder=rv40 --enable-decoder=aac
## 編譯ffmpeg armv7s（iPhone5）
## 完美通過
sudo ./configure --prefix=../armv7s --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --enable-cross-compile --sysroot="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.1.sdk" --target-os=darwin --cc="/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc" --extra-cflags="-arch armv7s -mfpu=neon -miphoneos-version-min=7.0" --extra-ldflags="-arch armv7s -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.1.sdk -miphoneos-version-min=7.0" --arch=arm --cpu=cortex-a9 --enable-pic --disable-asm --disable-everything --enable-decoder=h264 --enable-decoder=rv40 --enable-decoder=aac
## 說明
1. 以前需要gas-preprocessor.pl這個檔案，但經過測試，在XCode4環境下是需要的，XCode5環境下已經不需要了。
2. /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc 這裡cc c++ clang++ 都是clang的軟串連
3. 多了一個-miphoneos-version-min=7.0，沒有這個欄位會出一個動態庫錯誤，具體可以自己試試。
## to do
## 參數最佳化
## http://blog.csdn.net/whf727/article/details/18089261
