FFmpeg编译：Linux下使用NDK编译FFmpeg

#!/bin/bash
echo "进入编译ffmpeg脚本"
NDK=/home/yongdaimi/Android/android-ndk-r14b
#5.0
PLATFORM=$NDK/platforms/android-21/arch-arm
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64
CPU=armv7-a
#输出路径
PREFIX=./android/$CPU
function buildFF
{
    echo "开始编译ffmpeg"
    ./configure     --prefix=$PREFIX     --target-os=android     --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi-     --arch=arm     --cpu=$CPU      --sysroot=$PLATFORM     --extra-cflags="$CFLAG"     --cc=$TOOLCHAIN/bin/arm-linux-androideabi-gcc     --nm=$TOOLCHAIN/bin/arm-linux-androideabi-nm     --enable-shared     --enable-runtime-cpudetect     --enable-gpl     --enable-small     --enable-cross-compile     --disable-debug     --disable-static     --disable-doc     --disable-ffmpeg     --disable-ffplay     --disable-ffprobe     --disable-ffserver     --disable-postproc     --disable-avdevice     --disable-symver     --disable-stripping     $ADD 
    make -j16
    make install
    echo "编译结束！"
}
###########################################################
echo "编译支持neon和硬解码"
CPU=armv7-a
PREFIX=./android/armv7-a-neon-hard
CFLAG="-I$PLATFORM/usr/include -fPIC -DANDROID -mfpu=neon -mfloat-abi=softfp "
ADD="--enable-asm \
    --enable-neon     --enable-jni     --enable-mediacodec     --enable-decoder=h264_mediacodec     --enable-hwaccel=h264_mediacodec "
buildFF

###########################################################
#echo "编译不支持neon和硬解码"
#CPU=armv7-a
#PREFIX=./android/$CPU
#CFLAG="-I$PLATFORM/usr/include -fPIC -DANDROID -mfpu=vfp -mfloat-abi=softfp "
#ADD=
#buildFF