Ubuntu下ndk編譯ffmpeng
下載和配置ndk
1.獲取資源
獲取sdkmanager可下載資源路徑 sdkmanager --list --sdk_root=${ANDROID_HOME}
2.找到ndk下可下載文件位置
ndk-bundle| 21.2.6472646 | NDK
ndk;16.1.4479499| 16.1.4479499 | NDK (Side by side) 16.1.4479499
ndk;17.2.4988734| 17.2.4988734 | NDK (Side by side) 17.2.4988734
ndk;18.1.5063045| 18.1.5063045 | NDK (Side by side) 18.1.5063045
ndk;19.2.5345600| 19.2.5345600 | NDK (Side by side) 19.2.5345600
ndk;20.0.5594570| 20.0.5594570 | NDK (Side by side) 20.0.5594570
ndk;20.1.5948944| 20.1.5948944 | NDK (Side by side) 20.1.5948944
ndk;21.0.6113669| 21.0.6113669 | NDK (Side by side) 21.0.6113669
ndk;21.1.6352462| 21.1.6352462 | NDK (Side by side) 21.1.6352462
ndk;21.2.6472646| 21.2.6472646 | NDK (Side by side) 21.2.6472646
3.下載 sdkmanager "ndk;17.2.4988734" --sdk_root=${ANDROID_HOME}
重要以上編譯版本都編譯不成功，各種問題，只能使用低版本了，我選用的 14b
ndk 15c - wget https://dl.google.com/android/repository/android-ndk-r15c-linux-x86_64.zip
ndk 14b - wget https://dl.google.com/android/repository/android-ndk-r14b-linux-x86_64.zip
ndk 13b - wget https://dl.google.com/android/repository/android-ndk-r13b-linux-x86_64.zip
ndk 13 - wget https://dl.google.com/android/repository/android-ndk-r13-linux-x86_64.zip
ndk 12b - wget https://dl.google.com/android/repository/android-ndk-r12b-linux-x86_64.zip
4.配置環境變量
// 打開/etc/profile文件
export NDK_HOME=ndk絕對路徑
export PATH=$NDK_HOME:$PATH
source /etc/profile
5.查看ndk配置是否成功
// 執行命令
echo $NDK_HOME // 查看路徑
// 查看ndK版本
ndk-build -v
// 顯示內容如下：
GNU Make 3.81
Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
This program built for x86_64-pc-linux-gnu
獲取ffmpeg
1.下載
wget http://ffmpeg.org/releases/ffmpeg-3.1.11.tar.gz
2.解壓
tar -zxvf ffmpeg-3.1.11.tar.gz
3.安裝make程序
sudo apt install make
sudo apt install make-guile
4.創建執行編譯的腳本文件 build_android.sh
執行文件放在 /home/用戶/ffmpeg-3.1.11/ 目錄下
執行 ./build_android.sh
#!/bin/sh
make clean
MY_LIBS_NAME=ffmpeg-3.1.11
MY_DIR=/home/用戶/ffmpeg-3.1.11
# cd ./${MY_DIR}
#編譯的過程中產生的中間件的存放目錄，爲了區分編譯目錄，源碼目錄，install目錄
MY_BUILD_DIR=binary
NDK_PATH=/home/用戶/android_sdk/ndk/android-ndk-r14b
BUILD_PLATFORM=linux-x86_64
TOOLCHAIN_VERSION=4.9
ANDROID_VERSION=21
ANDROID_ARMV5_CFLAGS="-march=armv5te"
ANDROID_ARMV7_CFLAGS="-march=armv7-a -mfloat-abi=softfp -mfpu=neon" #-mfloat-abi=hard -mfpu=vfpv3-d16 #-mfloat-abi=hard -mfpu=vfp
ANDROID_ARMV8_CFLAGS="-march=armv8-a"
ANDROID_X86_CFLAGS="-march=i686 -mtune=intel -mssse3 -mfpmath=sse -m32"
ANDROID_X86_64_CFLAGS="-march=x86-64 -msse4.2 -mpopcnt -m64 -mtune=intel"
# params($1:arch,$2:arch_abi,$3:host,$4:cross_prefix,$5:cflags)
build_bin() {
echo "-------------------start build $2-------------------------"
ARCH=$1 # arm arm64 x86 x86_64
ANDROID_ARCH_ABI=$2 # armeabi armeabi-v7a x86 mips
PREFIX=$(pwd)/dist/${MY_LIBS_NAME}/${ANDROID_ARCH_ABI}/ # 輸出路徑
HOST=$3
SYSROOT=${NDK_PATH}/platforms/android-${ANDROID_VERSION}/arch-${ARCH}
CFALGS=$5
TOOLCHAIN=${NDK_PATH}/toolchains/${HOST}-${TOOLCHAIN_VERSION}/prebuilt/${BUILD_PLATFORM}
CROSS_PREFIX=${TOOLCHAIN}/bin/$4-
# build 中間件
BUILD_DIR=./${MY_BUILD_DIR}/${ANDROID_ARCH_ABI}
echo "pwd==$(pwd)"
echo "ARCH==${ARCH}"
echo "PREFIX==${PREFIX}"
echo "HOST==${HOST}"
echo "SYSROOT=${SYSROOT}"
echo "CFALGS=$5"
echo "CFALGS=${CFALGS}"
echo "TOOLCHAIN==${TOOLCHAIN}"
echo "CROSS_PREFIX=${CROSS_PREFIX}"
#echo "-------------------------按任意鍵繼續---------------------"
#read -n 1
#echo "-------------------------繼續執行-------------------------"
mkdir -p ${BUILD_DIR} #創建當前arch_abi的編譯目錄,比如:binary/armeabi-v7a
cd ${BUILD_DIR} #此處 進了當前arch_abi的2級編譯目錄
sh ${MY_DIR}/configure \
--prefix=${PREFIX} \
--target-os=linux \
--arch=${ARCH} \
--sysroot=$SYSROOT \
--enable-cross-compile \
--cross-prefix=${CROSS_PREFIX} \
--extra-cflags="$CFALGS -Os -fPIC -DANDROID -Wfatal-errors -Wno-deprecated" \
--extra-cxxflags="-D__thumb__ -fexceptions -frtti" \
--extra-ldflags="-L${SYSROOT}/usr/lib" \
--enable-shared \
--enable-asm \
--enable-neon \
--disable-encoders \
--enable-encoder=aac \
--enable-encoder=mjpeg \
--enable-encoder=png \
--disable-decoders \
--enable-decoder=aac \
--enable-decoder=aac_latm \
--enable-decoder=h264 \
--enable-decoder=mpeg4 \
--enable-decoder=mjpeg \
--enable-decoder=png \
--disable-demuxers \
--enable-demuxer=image2 \
--enable-demuxer=h264 \
--enable-demuxer=aac \
--disable-parsers \
--enable-parser=aac \
--enable-parser=ac3 \
--enable-parser=h264 \
--enable-gpl \
--disable-doc \
--disable-ffmpeg \
--disable-ffplay \
--disable-ffprobe \
--disable-symver \
--disable-debug \
--enable-small
make clean
make
make install
#從當前arch_abi編譯目錄跳出，對應上面的cd ${BUILD_DIR},以便function多次執行
cd ../../
echo "-------------------$2 build end-------------------------"
}
# build armeabi
build_bin arm armeabi arm-linux-androideabi arm-linux-androideabi "$ANDROID_ARMV5_CFLAGS"
#build armeabi-v7a
build_bin arm armeabi-v7a arm-linux-androideabi arm-linux-androideabi "$ANDROID_ARMV7_CFLAGS"
#build arm64-v8a
build_bin arm64 arm64-v8a aarch64-linux-android aarch64-linux-android "$ANDROID_ARMV8_CFLAGS"
#build x86
build_bin x86 x86 x86 i686-linux-android "$ANDROID_X86_CFLAGS"
#build x86_64
build_bin x86_64 x86_64 x86_64 x86_64-linux-android "$ANDROID_X86_64_CFLAGS"
5.修改configure文件
文件路徑 /home/用戶/ffmpeg-3.1.11/configure
# SLIBNAME_WITH_MAJOR='$(SLIBNAME).$(LIBMAJOR)'
# LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
# SLIB_INSTALL_NAME='$(SLIBNAME_WITH_VERSION)'
# SLIB_INSTALL_LINKS='$(SLIBNAME_WITH_MAJOR) $(SLIBNAME)'
#修改爲以下內容
SLIBNAME_WITH_MAJOR='$(SLIBPREF)$(FULLNAME)-$(LIBMAJOR)$(SLIBSUF)'
LIB_INSTALL_EXTRA_CMD='$$(RANLIB) "$(LIBDIR)/$(LIBNAME)"'
SLIB_INSTALL_NAME='$(SLIBNAME_WITH_MAJOR)'
SLIB_INSTALL_LINKS='$(SLIBNAME)'
6.編譯最終生成所需要的文件
/home/用戶/ffmpeg-3.1.11/dist
資源下載