ubuntu 编译 ffmpeg For Android

1. 安装虚拟机，然后 ubuntu 18.04.4 (不知道为啥 20 不能用... yum 一直失败)

2. sudo apt-get install gcc

3. sudo apt-get install yasm

4. sudo apt-get install pkg-config

5. chmod 777 configure

./configure (WARNING: pkg-config not found, library detection may fail. ???)

6. sudo apt-get install update. 再 sudo apt-get install pkg-config

7. ./configure （这次成功了）

8. chmod 777 build_android.sh

./build_android.sh

附录：修改 configure

#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)’

SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'

LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'

SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'

SLIB_INSTALL_LINKS='$(SLIBNAME)'

写build_android.sh

#!/bin/bash
export NDK_HOME=/home/matt/Downloads/android-ndk-r14b
export PLATFORM_VERSION=android-9
function build
{
   echo "start build ffmpeg for $ARCH"
   ./configure --target-os=linux \
   --prefix=$PREFIX --arch=$ARCH \
   --disable-doc \
   --enable-shared \
   --disable-static \
   --disable-yasm \
   --disable-asm \
   --disable-symver \
   --enable-gpl \
   --disable-ffmpeg \
   --disable-ffplay \
   --disable-ffprobe \
   --disable-ffserver \
   --cross-prefix=$CROSS_COMPILE \
   --enable-cross-compile \
   --sysroot=$SYSROOT \
   --enable-small \
   --extra-cflags="-Os -fpic $ADDI_CFLAGS" \
   --extra-ldflags="$ADDI_LDFLAGS" \
   $ADDITIONAL_CONFIGURE_FLAG
   make clean
   make
   make install
   echo "build ffmpeg for $ARCH finished"
}

#arm
ARCH=arm
CPU=arm
PREFIX=$(pwd)/android/$ARCH
TOOLCHAIN=$NDK_HOME/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64
CROSS_COMPILE=$TOOLCHAIN/bin/arm-linux-androideabi-
ADDI_CFLAGS="-marm"
SYSROOT=$NDK_HOME/platforms/$PLATFORM_VERSION/arch-$ARCH/
build

#x86
ARCH=x86
CPU=x86
PREFIX=$(pwd)/android/$ARCH
TOOLCHAIN=$NDK_HOME/toolchains/x86-4.9/prebuilt/linux-x86_64
CROSS_COMPILE=$TOOLCHAIN/bin/i686-linux-android-
ADDI_CFLAGS="-march=i686 -mtune=intel -mssse3 -mfpmath=sse -m32"
SYSROOT=$NDK_HOME/platforms/$PLATFORM_VERSION/arch-$ARCH/
build

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