使用NDK编译ffmpeg库

来源：互联网发布：linux查看snmp团体名编辑：程序博客网时间：2024/05/29 03:16

1、在 http://developer.android.com/tools/sdk/ndk/index.html
下载 android-ndk-r10e-linux-x86_64.bin
然后热行如下命令安装NDK，我是在ubuntu 14.04下安装的，在WIN下要装cygwin,会麻烦很多，不推荐。

它官方的安装提示如下:
On Linux and Mac OS X (Darwin):
1. Download the appropriate package from this page.
2. Open a terminal window.
3. Go to the directory to which you downloaded the package.
4. Run chmod a+x on the downloaded package.
5. Execute the package. For example:

ndk$ chmod a+x android-ndk-r10e-linux-x86_64.bin
ndk$ ./android-ndk-r10e-linux-x86_64.bin

更具体的安装与配置见《Ubuntu14.04下最新Android NDK安装》

2. 进入ffmpeg官网，http://ffmpeg.org/ 下载最新版的ffmpgeg压缩包。
我下的是 ffmpeg-2.8.1
（1）修改 configure 文件

将该文件中的如下四行：
SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
LIB_INSTALL_EXTRA_CMD='$$(RANLIB)"$(LIBDIR)/$(LIBNAME)"'
SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR)$(SLIBNAME)'
替换为：
SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
LIB_INSTALL_EXTRA_CMD='$$(RANLIB)"$(LIBDIR)/$(LIBNAME)"'
SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
SLIB_INSTALL_LINKS='$(SLIBNAME)'

（2）在源码目录下创建,ndk_build_config.sh
#!/bin/bash
NDK=/home/cxx/ndk/android-ndk-r10c
SYSROOT=$NDK/platforms/android-19/arch-arm/
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64

function build_one
{
./configure \
--prefix=$PREFIX \
--enable-shared \
--disable-static \
--disable-doc \
--disable-ffserver \
--enable-gpl\
--enable-libx264 \
--enable-encoder=libx264 \
--enable-decoder=h264 \
--enable-cross-compile \
--cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
--target-os=linux \
--arch=arm \
--sysroot=$SYSROOT \
--extra-cflags="-Os -fpic $ADDI_CFLAGS" \
--extra-ldflags="$ADDI_LDFLAGS" \
$ADDITIONAL_CONFIGURE_FLAG
}
CPU=arm
PREFIX=$(pwd)/android/$CPU
ADDI_CFLAGS="-marm -I../x264/android/arm/include -DANDROID "
ADDI_LDFLAGS="-L../x264/android/arm/lib"
build_one

编译运行
$ chmod a+x ndk_build_config.sh
$ ./ndk_build_config.sh
$ make
$ make install

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