linux下生成ffmpeg的so包用于android开发浅尝_linux下ffmpeg打包apk-优快云博客

本文详细介绍了在Linux环境下，如何使用NDK和FFmpeg生成适用于Android开发的so包。从安装虚拟机开始，逐步讲解了所需软件的下载与配置，包括git、unzip、vim等，并提供了具体的编译步骤和shell脚本示例。

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linux下生成ffmpeg的so包用于android开发浅尝

安装linux
下载ndk以及ffmpeg
修改配置文件
生产so包
首先，安装我是在windows里面安装的vwmware，然后安装的ubuntu虚拟机；
安装好以后，首先配置相关软件；

//1.创建ffmpeg文件
jianghp92@ubuntu:~/Desktop$ mkdir ffmpeg
jianghp92@ubuntu:~/Desktop$ 
//2.安装所需要的相关软件
//下载git
jianghp92@ubuntu:~/Desktop$ sudo apt-get install git
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following additional packages will be installed:
  git-man liberror-perl
Suggested packages:
  git-daemon-run | git-daemon-sysvinit git-doc git-el git-email git-gui gitk
  gitweb git-cvs git-mediawiki git-svn
The following NEW packages will be installed:
  git git-man liberror-perl
0 upgraded, 3 newly installed, 0 to remove and 15 not upgraded.
Need to get 4,733 kB of archives.
After this operation, 33.9 MB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Get:1 http://us.archive.ubuntu.com/ubuntu bionic/main amd64 liberror-perl all 0.17025-1 [22.8 kB]
Get:2 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 git-man all 1:2.17.1-1ubuntu0.4 [803 kB]
Get:3 http://us.archive.ubuntu.com/ubuntu bionic-updates/main amd64 git amd64 1:2.17.1-1ubuntu0.4 [3,907 kB]
Fetched 4,733 kB in 3s (1,437 kB/s)
Selecting previously unselected package liberror-perl.
(Reading database ... 126438 files and directories currently installed.)
Preparing to unpack .../liberror-perl_0.17025-1_all.deb ...
Unpacking liberror-perl (0.17025-1) ...
Selecting previously unselected package git-man.
Preparing to unpack .../git-man_1%3a2.17.1-1ubuntu0.4_all.deb ...
Unpacking git-man (1:2.17.1-1ubuntu0.4) ...
Selecting previously unselected package git.
Preparing to unpack .../git_1%3a2.17.1-1ubuntu0.4_amd64.deb ...
Unpacking git (1:2.17.1-1ubuntu0.4) ...
Setting up git-man (1:2.17.1-1ubuntu0.4) ...
Setting up liberror-perl (0.17025-1) ...
Processing triggers for man-db (2.8.3-2ubuntu0.1) ...
Setting up git (1:2.17.1-1ubuntu0.4) ...

同理下载其他的如unzip 还有vim等。
下载ndk以及ffmpeg

jianghp92@ubuntu:~/Desktop/ffmpeg$ ls
android-ndk-r10e  android-ndk-r10e-linux-x86_64.zip  ffmpeg-3.0  ffmpeg-3.0.tar.gz
jianghp92@ubuntu:~/Desktop/ffmpeg$ cd ffmpeg-3.0

修改ffmpeg中的configure文件:

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)'

替换成下面的
SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'  
LIB_INSTALL_EXTRA_CMD='$$(RANLIB)"$(LIBDIR)/$(LIBNAME)"'  
SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'  
SLIB_INSTALL_LINKS='$(SLIBNAME)'

接下来新建一个文件 build_android.sh

jianghp92@ubuntu:~/Desktop/ffmpeg/ffmpeg-3.0$ touch build_android.sh
jianghp92@ubuntu:~/Desktop/ffmpeg/ffmpeg-3.0$ chmod +x build_android.sh

编辑如下：

#!/bin/bash
export TMPDIR=/Users/hubin/Desktop/ffmpeg-3.0/ffmpegtemp #这句很重要，不然会报错 unable to create temporary file in

# NDK的路径，根据自己的安装位置进行设置
NDK=/home/jhp2019/Desktop/ffmpeg/android-ndk-r10e

# 编译针对的平台，可以根据自己的需求进行设置
# 这里选择最低支持android-14, arm架构，生成的so库是放在
# libs/armeabi文件夹下的，若针对x86架构，要选择arch-x86
PLATFORM=$NDK/platforms/android-14/arch-arm

# 工具链的路径，根据编译的平台不同而不同
# arm-linux-androideabi-4.9与上面设置的PLATFORM对应，4.9为工具的版本号，
# 根据自己安装的NDK版本来确定，一般使用最新的版本
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64

function build_one
{
./configure \
    --prefix=$PREFIX \
    --target-os=linux \
    --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
    --arch=arm \
    --sysroot=$PLATFORM \
    --extra-cflags="-I$PLATFORM/usr/include" \
    --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-asm \
    --disable-ffmpeg \
    --disable-ffplay \
    --disable-ffprobe \
    --disable-ffserver \
    --disable-postproc \
    --disable-avdevice \
    --disable-symver \
    --disable-stripping \

$ADDITIONAL_CONFIGURE_FLAG
sed -i '' 's/HAVE_LRINT 0/HAVE_LRINT 1/g' config.h
sed -i '' 's/HAVE_LRINTF 0/HAVE_LRINTF 1/g' config.h
sed -i '' 's/HAVE_ROUND 0/HAVE_ROUND 1/g' config.h
sed -i '' 's/HAVE_ROUNDF 0/HAVE_ROUNDF 1/g' config.h
sed -i '' 's/HAVE_TRUNC 0/HAVE_TRUNC 1/g' config.h
sed -i '' 's/HAVE_TRUNCF 0/HAVE_TRUNCF 1/g' config.h
sed -i '' 's/HAVE_CBRT 0/HAVE_CBRT 1/g' config.h
sed -i '' 's/HAVE_RINT 0/HAVE_RINT 1/g' config.h

make clean
make -j4
make install

}

# arm v7vfp
CPU=armv7-a
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU "
PREFIX=./android/$CPU-vfp
ADDITIONAL_CONFIGURE_FLAG=
build_one

# CPU=armv
# PREFIX=$(pwd)/android/$CPU
# ADDI_CFLAGS="-marm"
# build_one

#arm v6
#CPU=armv6
#OPTIMIZE_CFLAGS="-marm -march=$CPU"
#PREFIX=./android/$CPU 
#ADDITIONAL_CONFIGURE_FLAG=
#build_one

#arm v7vfpv3
# CPU=armv7-a
# OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=$CPU "
# PREFIX=./android/$CPU
# ADDITIONAL_CONFIGURE_FLAG=
# build_one

#arm v7n
#CPU=armv7-a
#OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=neon -marm -march=$CPU -mtune=cortex-a8"
#PREFIX=./android/$CPU 
#ADDITIONAL_CONFIGURE_FLAG=--enable-neon
#build_one

#arm v6+vfp
#CPU=armv6
#OPTIMIZE_CFLAGS="-DCMP_HAVE_VFP -mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU"
#PREFIX=./android/${CPU}_vfp 
#ADDITIONAL_CONFIGURE_FLAG=
#build_one

然后执行即可

jianghp92@ubuntu:~/Desktop/ffmpeg/ffmpeg-3.0$ ./build_android.sh