ffmpeg怎样移植到android

1、下载ffmpeg源码(我使用的2.7版本)
2、下载h264编码器
3、编译h264编码器静态库(build_h264.sh)
[cpp] view plain copy
export NDK=/home/juhaowangluo/ndk/android-ndk-r10d
export PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.6/prebuilt
export PLATFORM=$NDK/platforms/android-19/arch-arm
export PREFIX=/home/juhaowangluo/LiuCongkuan/ffmpeg/Android_ndk/android-x264
./configure --prefix=$PREFIX --cross-prefix=/home/juhaowangluo/ndk/android-ndk-r10d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi- --sysroot=/home/juhaowangluo/ndk/android-ndk-r10d/platforms/android-19/arch-arm --enable-static --enable-pic --disable-asm --disable-cli --host=arm-linux
编译成功后会在ffmpeg/Android_ndk/android-x264/lib目录中出现一个libx264.a文件
4、编译ffmpeg库(build_ffmepg.sh)
这一步问题最多，大家遇到了慢慢解决，我只把我遇到问题列一下。
网上编译脚本很多，但都很复杂，这个相对来说简单点(我对make file脚本不熟)。
[cpp] view plain copy
#!/bin/sh
NDK="/home/juhaowangluo/ndk/android-ndk-r10d"
PREBUILT="/home/juhaowangluo/ndk/android-ndk-r10d/toolchains/arm-linux-androideabi-4.6/prebuilt"
PLATFORM="/home/juhaowangluo/ndk/android-ndk-r10d/platforms/android-19/arch-arm"
PREFIX="/home/juhaowangluo/LiuCongkuan/ffmpeg/Android_ndk/android-x264"
build_one(){
./configure --target-os=linux --prefix=/home/juhaowangluo/LiuCongkuan/ffmpeg/Android_ndk/android-x264 \
--enable-cross-compile \
--enable-runtime-cpudetect \
--disable-asm \
--arch=arm \
--cc=/home/juhaowangluo/ndk/android-ndk-r10d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc \
--cross-prefix=/home/juhaowangluo/ndk/android-ndk-r10d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi- \
--disable-stripping \
--nm=/home/juhaowangluo/ndk/android-ndk-r10d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi-nm \
--sysroot=/home/juhaowangluo/ndk/android-ndk-r10d/platforms/android-19/arch-arm \
--enable-nonfree \
--enable-version3 \
--disable-everything \
--enable-gpl \
--disable-doc \
--enable-avresample \
--enable-demuxers \
--enable-muxers \
--disable-ffplay \
--disable-ffserver \
--disable-ffmpeg \
--disable-ffprobe \
--disable-devices \
--disable-avdevice \
--enable-encoders \
--enable-decoders \
--enable-libx264 \
--enable-encoder=libx264 \
--enable-decoder=h264 \
--enable-protocols \
--enable-hwaccels \
--enable-zlib \
--enable-decoder=flv \
--enable-encoder=flv \
--enable-decoder=rawvideo \
--enable-decoder=h263 \
--enable-parser=h263 \
--enable-demuxer=h263 \
--extra-cflags="-I/home/juhaowangluo/LiuCongkuan/ffmpeg/Android_ndk/android-x264/include -fPIC -DANDROID -D__thumb__ -mthumb -Wfatal-errors -Wno-deprecated -mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=armv7-a" \
--extra-ldflags="-L/home/juhaowangluo/LiuCongkuan/ffmpeg/Android_ndk/android-x264/lib"
make -j4 install

/home/juhaowangluo/ndk/android-ndk-r10d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ar d libavcodec/libavcodec.a inverse.o

/home/juhaowangluo/ndk/android-ndk-r10d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld -rpath-link=${PLATFORM}/usr/lib -L${PLATFORM}/usr/lib -L${PREFIX}/lib -soname libffmpeg.so -shared -nostdlib -z noexecstack -Bsymbolic --whole-archive --no-undefined -o ${PREFIX}/libffmpeg.so libavcodec/libavcodec.a libavfilter/libavfilter.a libavresample/libavresample.a libavformat/libavformat.a libavutil/libavutil.a libswscale/libswscale.a libswresample/libswresample.a -lc -lm -lz -ldl -llog -lx264 --dynamic-linker=/system/bin/linker ${PREBUILT}/linux-x86_64/lib/gcc/arm-linux-androideabi/4.6/libgcc.a
}

build_one

编译成功后会在Android_ndk\android-x264下面生成一个libffmpeg.so文件，到此带h264编码的ffmepg库编译完成。