Android音视频开发 六.编译FFMPEG

当前NDK版本为r21b, ffmpeg版本为4.3.1

在原作者基础上有修改

1. API等级是21

2. 4.3.1 版本并不需要手动修改ffmpeg的configure文件,因为打出来的so文件是没有版本号的

3. ffmpeg 目录结构有修改, 所以有一个cd的过程

目录结构

tree -L 1

.

├── android # 输出目录

├── build_ffmpeg_android.sh # 脚本

├── config-env.sh # 选项

└── ffmpeg-4.3.1 # ffmpeg 目录

编译选项可以使用 ./configure -h 查看, 可以根据自己的需求开启或关闭编解码支持, 会显著降低so大小

本选项编译出的文件文件尺寸如下:

ll android/libs/arm64-v8a

total 11624

-rwxr-xr-x 1 caijinglong staff 3.9M 7 26 16:28 libavcodec.so

-rwxr-xr-x 1 caijinglong staff 106K 7 26 16:28 libavfilter.so

-rwxr-xr-x 1 caijinglong staff 771K 7 26 16:28 libavformat.so

-rwxr-xr-x 1 caijinglong staff 443K 7 26 16:28 libavutil.so

-rwxr-xr-x 1 caijinglong staff 82K 7 26 16:28 libswresample.so

-rwxr-xr-x 1 caijinglong staff 398K 7 26 16:28 libswscale.so

#!/bin/bash

NDK=/Users/yaozhipeng/android-ndk-r21b
TOOLCHAIN=$NDK/toolchains/llvm/prebuilt/darwin-x86_64
API=21

function build_android() {
    cd ffmpeg-4.3.1
    echo "Compiling FFmpeg for $CPU"
    ./configure \
        --prefix=$PREFIX \
        --libdir=$LIB_DIR \
        --enable-shared \
        --disable-static \
        --enable-jni \
        --disable-doc \
        --disable-symver \
        --disable-programs \
        --target-os=android \
        --arch=$ARCH \
        --cpu=$CPU \
        --cc=$CC \
        --cxx=$CXX \
        --enable-cross-compile \
        --sysroot=$SYSROOT \
        --extra-cflags="-Os -fpic $OPTIMIZE_CFLAGS" \
        --extra-ldflags="$ADDI_LDFLAGS" \
        --disable-asm \
        $COMMON_FF_CFG_FLAGS
    make clean
    make -j8
    make install
    echo "The Compilation of FFmpeg for $CPU is completed"
    echo "Output library : $LIB_DIR"
    cd ..
}

## armv8-a
function v8() {
    source "config-env.sh"
    OUTPUT_FOLDER="arm64-v8a"
    ARCH=arm64
    CPU="armv8-a"
    TOOL_CPU_NAME=aarch64
    TOOL_PREFIX="$TOOLCHAIN/bin/$TOOL_CPU_NAME-linux-android"

    CC="$TOOL_PREFIX$API-clang"
    CXX="$TOOL_PREFIX$API-clang++"
    SYSROOT="$NDK/toolchains/llvm/prebuilt/darwin-x86_64/sysroot"
    PREFIX="${PWD}/android/$OUTPUT_FOLDER"
    LIB_DIR="${PWD}/android/libs/$OUTPUT_FOLDER"
    OPTIMIZE_CFLAGS="-march=$CPU"
    build_android
}

## armv7-a
function v7() {
    source "config-env.sh"
    OUTPUT_FOLDER="armeabi-v7a"
    ARCH="arm"
    CPU="armv7-a"
    TOOL_CPU_NAME=armv7a
    TOOL_PREFIX="$TOOLCHAIN/bin/arm-linux-androideabi"

    CC="$TOOLCHAIN/bin/armv7a-linux-androideabi$API-clang"
    CXX="$TOOLCHAIN/bin/armv7a-linux-androideabi$API-clang++"
    SYSROOT="$NDK/toolchains/llvm/prebuilt/darwin-x86_64/sysroot"
    PREFIX="${PWD}/android/$OUTPUT_FOLDER"
    LIB_DIR="${PWD}/android/libs/$OUTPUT_FOLDER"
    OPTIMIZE_CFLAGS="-march=$CPU"
    build_android
}

## x86
function x86() {
    source "config-env.sh"
    OUTPUT_FOLDER="x86"
    ARCH="x86"
    CPU="x86"
    TOOL_CPU_NAME="i686"
    TOOL_PREFIX="$TOOLCHAIN/bin/${TOOL_CPU_NAME}-linux-android"

    CC="$TOOL_PREFIX$API-clang"
    CXX="$TOOL_PREFIX$API-clang++"
    SYSROOT="$NDK/toolchains/llvm/prebuilt/darwin-x86_64/sysroot"
    PREFIX="${PWD}/android/$OUTPUT_FOLDER"
    LIB_DIR="${PWD}/android/libs/$OUTPUT_FOLDER"
    OPTIMIZE_CFLAGS="-march=i686 -mtune=intel -mssse3 -mfpmath=sse -m32"
    build_android
}

## x86_64
function x86_64() {
    source "config-env.sh"
    OUTPUT_FOLDER="x86_64"
    ARCH="x86_64"
    CPU="x86-64"
    TOOL_CPU_NAME="x86_64"
    TOOL_PREFIX="$TOOLCHAIN/bin/${TOOL_CPU_NAME}-linux-android"

    CC="$TOOL_PREFIX$API-clang"
    CXX="$TOOL_PREFIX$API-clang++"
    SYSROOT="$NDK/toolchains/llvm/prebuilt/darwin-x86_64/sysroot"
    PREFIX="${PWD}/android/$OUTPUT_FOLDER"
    LIB_DIR="${PWD}/android/libs/$OUTPUT_FOLDER"
    OPTIMIZE_CFLAGS="-march=$CPU"
    build_android
}

# 简单使用说明

if [ -z $1 ]; then
    echo "Usage:"
    echo "  $0 all"
    echo "  $0 armv8"
    echo "    all support cpu :armv7 armv8 x86 x86_64"
    exit -1
fi

# 检测构建全部

HAVE_ALL=0

for arg in $@; do

    if [ "$arg" == 'all' ]; then
        HAVE_ALL=1
    fi

done

if [ $HAVE_ALL -eq 1 ]; then

    x86
    x86_64
    v8
    v7
    exit 0

fi

# 根据输入参数检测构建哪种cpu

for arg in $@; do

    if [ "$arg" == 'x86' ]; then
        x86
    fi

    if [ "$arg" == 'x86_64' ]; then
        x86_64
    fi

    if [ "$arg" == 'armv8' ]; then
        v8
    fi

    if [ "$arg" == 'armv7' ]; then
        v7
    fi

done

如果想要和ijkplayer那样将所有so合并为一个libffmpeg.so库,可以看下面的说明

说是合并,实际上so是不支持合并的, 需要编译出.a静态库而不是so动态库, 然后将多个静态库合并为一个so, 然后用TOOLCHAIN中的gcc命令进行合并

gcc -shared -o -Wl --whole-archive avcodec.a avfilter.a other.a -Wl,--no-whole-archive

#! /usr/bin/env bash

# shell/config.sh
# 这个来自ijkplayer的ffmpeg配置, 会在上面的build脚本中被引入

#--------------------
# Standard options:
export COMMON_FF_CFG_FLAGS=
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --prefix=PREFIX"

# Licensing options:
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-gpl"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-version3"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-nonfree"

# Configuration options:
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-static"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-shared"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-small"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-runtime-cpudetect"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-gray"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-swscale-alpha"

# Program options:
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-programs"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-ffmpeg"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-ffplay"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-ffprobe"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-ffserver"

# Documentation options:
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-doc"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-htmlpages"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-manpages"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-podpages"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-txtpages"

# Component options:
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-avdevice"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-avcodec"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-avformat"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-avutil"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-swresample"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-swscale"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-postproc"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-avfilter"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-avresample"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-pthreads"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-w32threads"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-os2threads"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-network"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-dct"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-dwt"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-lsp"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-lzo"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-mdct"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-rdft"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-fft"

# Hardware accelerators:
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-d3d11va"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-dxva2"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-vaapi"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-vda"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-vdpau"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-videotoolbox"

# Individual component options:
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-everything"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-encoders"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-encoder=png"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-encoder=mjpeg"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-encoder=jpeg2000"

# ./configure --list-decoders
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-decoders"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-decoder=aac"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-decoder=aac_latm"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-decoder=flv"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-decoder=h264"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-decoder=mp3*"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-decoder=vp6f"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-decoder=flac"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-decoder=hevc"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-decoder=vp8"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-decoder=vp9"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-decoder=h263"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-decoder=h263i"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-decoder=h263p"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-decoder=mpeg4"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-decoder=mjpeg"

export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-hwaccels"

# ./configure --list-muxers
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-muxers"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-muxer=mp4"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-muxer=mjpeg"

# ./configure --list-demuxers
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-demuxers"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=aac"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=concat"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=data"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=flv"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=hls"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=live_flv"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=mov"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=mp3"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=mpegps"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=mpegts"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=mpegvideo"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=flac"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=hevc"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=webm_dash_manifest"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=mpeg4"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=rtsp"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=mjpeg"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=avi"

# ./configure --list-parsers
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-parsers"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-parser=aac"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-parser=aac_latm"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-parser=h264"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-parser=flac"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-parser=hevc"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-parser=mpeg4"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-parser=mpeg4video"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-parser=mpegvideo"

# ./configure --list-bsf
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-bsfs"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-bsf=chomp"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-bsf=dca_core"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-bsf=dump_extradata"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-bsf=hevc_mp4toannexb"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-bsf=imx_dump_header"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-bsf=mjpeg2jpeg"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-bsf=mjpega_dump_header"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-bsf=mov2textsub"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-bsf=mp3_header_decompress"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-bsf=mpeg4_unpack_bframes"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-bsf=noise"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-bsf=remove_extradata"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-bsf=text2movsub"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-bsf=vp9_superframe"

# ./configure --list-protocols
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-protocols"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-protocol=async"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-protocol=bluray"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-protocol=concat"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-protocol=crypto"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-protocol=ffrtmpcrypt"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-protocol=ffrtmphttp"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-protocol=gopher"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-protocol=icecast"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-protocol=librtmp*"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-protocol=libssh"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-protocol=md5"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-protocol=mmsh"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-protocol=mmst"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-protocol=rtmp*"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-protocol=rtmp"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-protocol=rtmpt"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-protocol=rtp"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-protocol=sctp"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-protocol=srtp"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-protocol=subfile"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-protocol=unix"

#
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-devices"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-filters"

# External library support:
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-iconv"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-audiotoolbox"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-videotoolbox"

# ...

# Advanced options (experts only):
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --cross-prefix=${FF_CROSS_PREFIX}-"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-cross-compile"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --sysroot=PATH"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --sysinclude=PATH"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --target-os=TAGET_OS"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --target-exec=CMD"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --target-path=DIR"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --toolchain=NAME"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --nm=NM"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --ar=AR"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --as=AS"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --yasmexe=EXE"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --cc=CC"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --cxx=CXX"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --dep-cc=DEPCC"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --ld=LD"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --host-cc=HOSTCC"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --host-cflags=HCFLAGS"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --host-cppflags=HCPPFLAGS"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --host-ld=HOSTLD"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --host-ldflags=HLDFLAGS"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --host-libs=HLIBS"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --host-os=OS"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --extra-cflags=ECFLAGS"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --extra-cxxflags=ECFLAGS"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --extra-ldflags=ELDFLAGS"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --extra-libs=ELIBS"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --extra-version=STRING"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --optflags=OPTFLAGS"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --build-suffix=SUFFIX"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --malloc-prefix=PREFIX"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --progs-suffix=SUFFIX"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --arch=ARCH"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --cpu=CPU"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-pic"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-sram"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-thumb"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-symver"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-hardcoded-tables"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-safe-bitstream-reader"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-memalign-hack"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-lto"

# Optimization options (experts only):
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-asm"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-altivec"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-amd3dnow"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-amd3dnowext"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-mmx"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-mmxext"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-sse"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-sse2"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-sse3"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-ssse3"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-sse4"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-sse42"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-avx"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-fma4"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-armv5te"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-armv6"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-armv6t2"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-vfp"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-neon"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-vis"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-inline-asm"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-yasm"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-mips32r2"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-mipsdspr1"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-mipsdspr2"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-mipsfpu"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-fast-unaligned"

# Developer options (useful when working on FFmpeg itself):
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-coverage"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-debug"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-debug=LEVEL"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-optimizations"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-extra-warnings"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-stripping"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --assert-level=level"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-memory-poisoning"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --valgrind=VALGRIND"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-ftrapv"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --samples=PATH"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-xmm-clobber-test"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-random"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-random"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-random=LIST"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-random=LIST"
# export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --random-seed=VALUE"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-linux-perf"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --disable-bzlib"