[原]ffmpeg編譯android 硬解碼支援庫 libstagefright

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最近花了一天時間將ffmpeg/tools/build_stagefright執行成功，主要是交叉編譯所需要的各種動態庫的支援沒連結上，導致各種報錯，基本上網路上問到的問題我都碰到了，特此記錄下來。

 

編譯環境：Ubuntu 14.04 + Android NDK + FFmpeg源碼。

第一步：將ffmpeg/tools/build_stagefright移動到ffmpeg下面，修改執行許可權。

　　

chmod u+x build_stagefright

 

第二步：開啟build_stagefright檔案，配置Android NDK路徑。

#!/bin/bash  export NDK=/to/your/ndk/pathif [ "$NDK" = "" ]; then      echo NDK variable not set, assuming ${HOME}/android-ndk-r8d      export NDK=${HOME}/android-ndk-r8d  fi  

 

第三步：build_stagefright中的http://download.cyanogenmod.com/get/update-cm-7.0.3-N1-signed.zip失效了，所以得手動下載update-cm-7.0.3-N1-signed.zip，附一個可以下載的地址http://sourceforge.net/projects/nexusoneandroid/files/update-cm-7.0.3-N1-signed.zip/stats/timeline

 

第四步：修改TOOLCHAIN=`echo $NDK/toolchains/arm-linux-androideabi-4.3.3/prebuilt/*-x86 ` 為 TOOLCHAIN=`echo $NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64 ` ，否則會出現arm-linux-androideabi-gcc is unable to create an executable file. C compiler test failed.這樣的錯誤

 

第五步：vim configure 將enabled libstagefright_h264  && require_cpp libstagefright_h264 改為 enabled libstagefright && require_cpp libstagefright_h264，否則會出現ERROR: libstagefright_h264 not found

 

第六步：將build_stagefright中的EXTRA_CFLAGS="$EXTRA_CFLAGS -I$NDK/sources/cxx-stl/gnu-libstdc++/include -I$NDK/sources/cxx-stl/gnu-libstdc++/libs/$ABI/include"改為EXTRA_CFLAGS="$EXTRA_CFLAGS -I$NDK/sources/cxx-stl/gnu-libstdc++/4.8/include -I$NDK/sources/cxx-stl/gnu-libstdc++/4.8/libs/$ABI/include"

 

第七步：將build_stagefright中的EXTRA_LDFLAGS="-Wl,--fix-cortex-a8 -L$ANDROID_LIBS -Wl,-rpath-link,$ANDROID_LIBS -L$NDK/sources/cxx-stl/gnu-libstdc++/libs/$ABI"更改為EXTRA_LDFLAGS="-Wl,--fix-cortex-a8 -L$ANDROID_LIBS -Wl,-rpath-link,$ANDROID_LIBS -L$NDK/sources/cxx-stl/gnu-libstdc++/4.8/libs/$ABI"

 

第八步：將build_stagefright中的EXTRA_LDFLAGS="-Wl,--fix-cortex-a8 -L$ANDROID_LIBS -Wl,-rpath-link,$ANDROID_LIBS -L$NDK/sources/cxx-stl/gnu-libstdc++/libs/$ABI"繼續修改添加交叉編譯所需要的外部庫。最終修改為：

EXTRA_LDFLAGS="-Wl,--fix-cortex-a8 -L$ANDROID_LIBS -Wl,-rpath-link,$ANDROID_LIBS -L$NDK/sources/cxx-stl/gnu-libstdc++/4.8/libs/$ABI -lstagefright     -lstdc++ -lutils -lbinder -lgnustl_static -lgnustl_shared"

第八步能解決大多數交叉編譯沒有連結相應的庫導致的問題。

最終修改完成的build_stagefright內容如下：

#!/bin/bashexport NDK=$ANDROID_NDKif [ "$NDK" = "" ]; then    echo NDK variable not set, assuming ${HOME}/android-ndk    export NDK=${HOME}/android-ndkfiecho "Fetching Android system headers"git clone --depth=1 --branch gingerbread-release git://github.com/CyanogenMod/android_frameworks_base.git ../android-source/frameworks/basegit clone --depth=1 --branch gingerbread-release git://github.com/CyanogenMod/android_system_core.git ../android-source/system/coreecho "Fetching Android libraries for linking"# Libraries from any froyo/gingerbread device/emulator should work# fine, since the symbols used should be available on most of them.if [ ! -d "../android-libs" ]; then    if [ ! -f "../update-cm-7.0.3-N1-signed.zip" ]; then        wget http://download.cyanogenmod.com/get/update-cm-7.0.3-N1-signed.zip -P../    fi    unzip ../update-cm-7.0.3-N1-signed.zip system/lib/* -d../    mv ../system/lib ../android-libs    rmdir ../systemfiSYSROOT=$NDK/platforms/android-9/arch-arm# Expand the prebuilt/* path into the correct oneTOOLCHAIN=`echo $NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64`export PATH=$TOOLCHAIN/bin:$PATHANDROID_SOURCE=../android-sourceANDROID_LIBS=../android-libsABI="armeabi-v7a"rm -rf ../build/stagefrightmkdir -p ../build/stagefrightDEST=../build/stagefrightFLAGS="--target-os=linux --cross-prefix=arm-linux-androideabi- --arch=arm --cpu=armv7-a"FLAGS="$FLAGS --sysroot=$SYSROOT"FLAGS="$FLAGS --disable-avdevice --disable-decoder=h264 --disable-decoder=h264_vdpau --enable-libstagefright-h264"EXTRA_CFLAGS="-I$ANDROID_SOURCE/frameworks/base/include -I$ANDROID_SOURCE/system/core/include"EXTRA_CFLAGS="$EXTRA_CFLAGS -I$ANDROID_SOURCE/frameworks/base/media/libstagefright"EXTRA_CFLAGS="$EXTRA_CFLAGS -I$ANDROID_SOURCE/frameworks/base/include/media/stagefright/openmax"EXTRA_CFLAGS="$EXTRA_CFLAGS -I$NDK/sources/cxx-stl/gnu-libstdc++/4.8/include -I$NDK/sources/cxx-stl/gnu-libstdc++/4.8/libs/$ABI/include"EXTRA_CFLAGS="$EXTRA_CFLAGS -march=armv7-a -mfloat-abi=softfp -mfpu=neon"EXTRA_LDFLAGS="-Wl,--fix-cortex-a8 -L$ANDROID_LIBS -Wl,-rpath-link,$ANDROID_LIBS -L$NDK/sources/cxx-stl/gnu-libstdc++/4.8/libs/$ABI -lstagefright -lstdc++ -lutils -lbinder -lgnustl_static -lgnustl_shared"#EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lcutils -ldl -lstlport -lc -lm -lz -ldl -llog -lstdc++ -lstagefright -lbinder  -lstlport -lstdc++ -lstl"EXTRA_CXXFLAGS="-Wno-multichar -fno-exceptions -fno-rtti"DEST="$DEST/$ABI"FLAGS="$FLAGS --prefix=$DEST"mkdir -p $DESTecho $FLAGS --extra-cflags="$EXTRA_CFLAGS" --extra-ldflags="$EXTRA_LDFLAGS" --extra-cxxflags="$EXTRA_CXXFLAGS" > $DEST/info.txt./configure $FLAGS --extra-cflags="$EXTRA_CFLAGS" --extra-ldflags="$EXTRA_LDFLAGS" --extra-cxxflags="$EXTRA_CXXFLAGS" | tee $DEST/configuration.txt[ $PIPESTATUS == 0 ] || exit 1make cleanmake -j4 || exit 1

 

第九步，執行./build_stagefright編譯,最終輸出如下內容則表示編譯成功：

CC    ffprobe.oCC    ffserver.oAR    libavfilter/libavfilter.aAR    libavformat/libavformat.aAR    libavcodec/libavcodec.aAR    libswresample/libswresample.aAR    libswscale/libswscale.aAR    libavutil/libavutil.aHOSTLD    doc/print_optionsGENTEXI    doc/avoptions_format.texiGENTEXI    doc/avoptions_codec.texiPOD    doc/ffmpeg.podPOD    doc/ffprobe.podPOD    doc/ffserver.podPOD    doc/ffmpeg-all.podPOD    doc/ffprobe-all.podPOD    doc/ffserver-all.podPOD    doc/ffmpeg-utils.podPOD    doc/ffmpeg-scaler.podPOD    doc/ffmpeg-resampler.podPOD    doc/ffmpeg-codecs.podPOD    doc/ffmpeg-bitstream-filters.podPOD    doc/ffmpeg-formats.podPOD    doc/ffmpeg-protocols.podPOD    doc/ffmpeg-filters.podPOD    doc/libavutil.podPOD    doc/libswscale.podPOD    doc/libswresample.podPOD    doc/libavcodec.podPOD    doc/libavformat.podPOD    doc/libavfilter.podMAN    doc/ffmpeg.1MAN    doc/ffprobe.1MAN    doc/ffserver.1MAN    doc/ffmpeg-all.1MAN    doc/ffprobe-all.1MAN    doc/ffserver-all.1MAN    doc/ffmpeg-utils.1MAN    doc/ffmpeg-scaler.1MAN    doc/ffmpeg-resampler.1MAN    doc/ffmpeg-codecs.1MAN    doc/ffmpeg-bitstream-filters.1MAN    doc/ffmpeg-formats.1MAN    doc/ffmpeg-protocols.1MAN    doc/ffmpeg-filters.1MAN    doc/libavutil.3MAN    doc/libswscale.3MAN    doc/libswresample.3MAN    doc/libavcodec.3MAN    doc/libavformat.3MAN    doc/libavfilter.3LD    ffmpeg_gLD    ffprobe_gLD    ffserver_gCP    ffprobeCP    ffmpegSTRIP    ffprobeSTRIP    ffmpegCP    ffserverSTRIP    ffserver

 

[原]ffmpeg編譯android 硬解碼支援庫 libstagefright