1.下載安裝MSYS2軟件饿肺，用來模擬linux環(huán)境唧喉，可以在官網(wǎng)https://www.msys2.org/下載
2.下載NDKr20,解壓
3.下載ffmpeg最新源碼，當(dāng)前最新版本是4.2.2箱叁，官網(wǎng)地址http://ffmpeg.org/download.html
4.解壓ffmpeg壓縮包到任意目錄
5.替換最終生成的so文件名

# 將ffmpeg-4.2.2目錄中configure 文件中的：
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)'

#替換為：
SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
SLIB_INSTALL_LINKS='$(SLIBNAME)'

6.進(jìn)入ffmpeg根目錄虱而，創(chuàng)建編譯腳本build_android.sh
7.將以下shell代碼復(fù)制到build_android.sh中

#!/bin/bash
#export TMPDIR=D:/msys64/home/Lanxumit/ffmpeg-4.2.2/temp #設(shè)置編譯中臨時文件目錄氨肌，不然會報錯 unable to create temporary file

# NDK的路徑，根據(jù)實際安裝位置設(shè)置
NDK=E:/Sdk/android-ndk-r20b

# 工具鏈的路徑廓鞠，arm-linux-androideabi-4.9與上面設(shè)置的PLATFORM對應(yīng)帚稠，4.9為工具的版本號
TOOLCHAIN=$NDK/toolchains/llvm/prebuilt/windows-x86_64
API=29

function build_android
{
echo "Compiling FFmpeg for $CPU"
./configure \
    --prefix=$PREFIX \
    --disable-neon \
    --disable-hwaccels \
    --disable-gpl \
    --disable-postproc \
    --enable-shared \
    --enable-jni \
    --disable-mediacodec \
    --disable-decoder=h264_mediacodec \
    --disable-static \
    --disable-doc \
    --disable-ffmpeg \
    --disable-ffplay \
    --disable-ffprobe \
    --disable-avdevice \
    --disable-doc \
    --disable-symver \
    --cross-prefix=$CROSS_PREFIX \
    --target-os=android \
    --arch=$ARCH \
    --cpu=$CPU \
    --cc=$CC
    --cxx=$CXX
    --enable-cross-compile \
    --sysroot=$SYSROOT \
    --extra-cflags="-Os -fpic $OPTIMIZE_CFLAGS" \
    --extra-ldflags="$ADDI_LDFLAGS" \
    $ADDITIONAL_CONFIGURE_FLAG
make clean
make
make install
echo "The Compilation of FFmpeg for $CPU is completed"
}

#armv8-a
ARCH=arm64
CPU=armv8-a
CC=$TOOLCHAIN/bin/aarch64-linux-android$API-clang
CXX=$TOOLCHAIN/bin/aarch64-linux-android$API-clang++
SYSROOT=$NDK/toolchains/llvm/prebuilt/windows-x86_64/sysroot
CROSS_PREFIX=$TOOLCHAIN/bin/aarch64-linux-android-
PREFIX=$(pwd)/android/$CPU
OPTIMIZE_CFLAGS="-march=$CPU"
build_android

#armv7-a
ARCH=arm
CPU=armv7-a
CC=$TOOLCHAIN/bin/armv7a-linux-androideabi$API-clang
CXX=$TOOLCHAIN/bin/armv7a-linux-androideabi$API-clang++
SYSROOT=$NDK/toolchains/llvm/prebuilt/windows-x86_64/sysroot
CROSS_PREFIX=$TOOLCHAIN/bin/arm-linux-androideabi-
PREFIX=$(pwd)/android/$CPU
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU "
build_android

#x86
ARCH=x86
CPU=x86
CC=$TOOLCHAIN/bin/i686-linux-android$API-clang
CXX=$TOOLCHAIN/bin/i686-linux-android$API-clang++
SYSROOT=$NDK/toolchains/llvm/prebuilt/windows-x86_64/sysroot
CROSS_PREFIX=$TOOLCHAIN/bin/i686-linux-android-
PREFIX=$(pwd)/android/$CPU
OPTIMIZE_CFLAGS="-march=i686 -mtune=intel -mssse3 -mfpmath=sse -m32"
build_android

#x86_64
ARCH=x86_64
CPU=x86-64
CC=$TOOLCHAIN/bin/x86_64-linux-android$API-clang
CXX=$TOOLCHAIN/bin/x86_64-linux-android$API-clang++
SYSROOT=$NDK/toolchains/llvm/prebuilt/windows-x86_64/sysroot
CROSS_PREFIX=$TOOLCHAIN/bin/x86_64-linux-android-
PREFIX=$(pwd)/android/$CPU
OPTIMIZE_CFLAGS="-march=$CPU -msse4.2 -mpopcnt -m64 -mtune=intel"
build_android

6.打開MSYS2編譯工具，進(jìn)入ffmpeg目錄
7.執(zhí)行sh文件床佳，./build_android.sh開始編譯
8.編譯完成查看文件,在/ffmpeg-4.2.2/android/目錄下