ubuntu 编译ffmpeg 小记

使用ndk 14 和ffmpeg 3.3.9

https://developer.android.google.cn/ndk/downloads/older_releases

http://ffmpeg.org/olddownload.html

 

1.修改configure

# SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
# LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
# SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
# SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
#
# 将上面四个变量的值改成如下：
SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'  
LIB_INSTALL_EXTRA_CMD='$$(RANLIB)"$(LIBDIR)/$(LIBNAME)"'  
SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'  
SLIB_INSTALL_LINKS='$(SLIBNAME)'

2.编写编译用的sh文件，名字随便，在ffmpeg目录下

linux是linux-x86_64,苹果的是darwin-x86_64

#!/bin/bash

# ndk环境    
export NDK=/home/ma/sss/NDK/android-ndk-r14b
export SYSROOT=$NDK/platforms/android-21/arch-arm
export TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64
CPU=armv7-a

# 要保存动态库的目录，这里保存在源码根目录下的android/armv7-a
export PREFIX=$(pwd)/android/$CPU
ADDI_CFLAGS="-marm"

function build_android
{
    echo "开始编译ffmpeg"

    ./configure \
        --target-os=linux \
        --prefix=$PREFIX \
        --enable-cross-compile \
        --enable-shared \
        --disable-static \
        --disable-doc \
        --disable-ffmpeg \
        --disable-ffplay \
        --disable-ffprobe \
        --disable-avdevice \
        --disable-doc \
        --disable-symver \
        --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
        --arch=arm \
        --sysroot=$SYSROOT \
        --extra-cflags="-Os -fpic $ADDI_CFLAGS" \
        --extra-ldflags="$ADDI_LDFLAGS" \
        $ADDITIONAL_CONFIGURE_FLAG

    make clean

    make -j16
    make install

    echo "编译结束！"
}

build_android

参考：Android NDK交叉编译FFmpeg

 

Android调用

参考：

问题

1.cmdutils.h:212:40: error: expected ')'

class是关键字不能作为参数名，将这个和cmdutil.c里的这个参数名修改一下就可以