Android 带有 libx264 的 ffmpeg - 未定义的引用
Android ffmpeg with libx264 - undefined references
我正在使用 Ubuntu 15.10 下的 appunite's project 使用 libx264 为 Android 构建 ffmpeg。我在没有 libx264 的情况下正确地构建了它，但是添加库总是给我 undefined reference to 'x264_picture_init' 和其他多个类似的错误。我通过邮寄 lists/other SO 问题尝试了各种可能的解决方案，但仍然没有帮助我解决问题。
我已经删除了 ffmpeg/libx264/libx264-dev 个包以避免系统中可能出现的重复库。我在 ffmpeg-build/ARCH/lib 中获得了 libx264.a 库，其他已构建的库位于此处。我也不认为这是由头文件与库不匹配引起的，因为系统中唯一的 x264.h 头文件是用于库构建的头文件。
这是我的build_android.sh。
set -x
if [ "$ANDROID_NDK_HOME" = "" ]; then
echo ANDROID_NDK_HOME variable not set, exiting
echo "Use: export ANDROID_NDK_HOME=/your/path/to/android-ndk"
exit 1
fi
# Get the newest arm-linux-androideabi version
if [ -z "$COMPILATOR_VERSION" ]; then
DIRECTORIES=$ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-*
for i in $DIRECTORIES; do
PROPOSED_NAME=${i#*$ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-}
if [[ $PROPOSED_NAME =~ ^[0-9\.]+$ ]] ; then
echo "Available compilator version: $PROPOSED_NAME"
COMPILATOR_VERSION=$PROPOSED_NAME
fi
done
fi
if [ -z "$COMPILATOR_VERSION" ]; then
echo "Could not find compilator"
exit 1
fi
if [ ! -d $ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-$COMPILATOR_VERSION ]; then
echo $ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-$COMPILATOR_VERSION does not exist
exit 1
fi
echo "Using compilator version: $COMPILATOR_VERSION"
OS_ARCH=`basename $ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-$COMPILATOR_VERSION/prebuilt/*`
echo "Using architecture: $OS_ARCH"
function setup_paths
{
export PLATFORM=$ANDROID_NDK_HOME/platforms/$PLATFORM_VERSION/arch-$ARCH/
if [ ! -d $PLATFORM ]; then
echo $PLATFORM does not exist
exit 1
fi
echo "Using platform: $PLATFORM"
export PATH=${PATH}:$PREBUILT/bin/
export CROSS_COMPILE=$PREBUILT/bin/$EABIARCH-
export CFLAGS=$OPTIMIZE_CFLAGS
export CPPFLAGS="$CFLAGS"
export CFLAGS="$CFLAGS"
export CXXFLAGS="$CFLAGS"
export CXX="${CROSS_COMPILE}g++ --sysroot=$PLATFORM"
export AS="${CROSS_COMPILE}gcc --sysroot=$PLATFORM"
export CC="${CROSS_COMPILE}gcc --sysroot=$PLATFORM"
export PKG_CONFIG="${CROSS_COMPILE}pkg-config"
export LD="${CROSS_COMPILE}ld"
export NM="${CROSS_COMPILE}nm"
export STRIP="${CROSS_COMPILE}strip"
export RANLIB="${CROSS_COMPILE}ranlib"
export AR="${CROSS_COMPILE}ar"
export LDFLAGS="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog"
export PKG_CONFIG_LIBDIR=$PREFIX/lib/pkgconfig/
export PKG_CONFIG_PATH=$PREFIX/lib/pkgconfig/
if [ ! -f "${CROSS_COMPILE}gcc" ]; then
echo "Gcc does not exists in path: ${CROSS_COMPILE}gcc"
exit 1;
fi
if [ ! -f "${PKG_CONFIG}" ]; then
echo "Pkg config does not exists in path: ${PKG_CONFIG} - Probably BUG in NDK but..."
set +e
SYS_PKG_CONFIG=$(which pkg-config)
if [ "$?" -ne 0 ]; then
echo "This system does not contain system pkg-config, so we can do anything"
exit 1
fi
set -e
cat > $PKG_CONFIG << EOF
#!/bin/bash
pkg-config $*
EOF
chmod u+x $PKG_CONFIG
echo "Because we have local pkg-config we will create it in ${PKG_CONFIG} directory using ${SYS_PKG_CONFIG}"
fi
}
function build_x264
{
echo "Starting build x264 for $ARCH"
cd x264
./configure --prefix=$PREFIX --host=$ARCH-linux --enable-static --disable-shared --enable-pic --disable-cli $ADDITIONAL_CONFIGURE_FLAG
make clean
make -j4 install
make clean
cd ..
echo "FINISHED x264 for $ARCH"
}
function build_amr
{
echo "Starting build amr for $ARCH"
cd vo-amrwbenc
./configure \
--prefix=$PREFIX \
--host=$ARCH-linux \
--disable-dependency-tracking \
--disable-shared \
--enable-static \
--with-pic \
$ADDITIONAL_CONFIGURE_FLAG
make clean
make -j4 install
make clean
cd ..
echo "FINISHED amr for $ARCH"
}
function build_aac
{
echo "Starting build aac for $ARCH"
cd vo-aacenc
./configure \
--prefix=$PREFIX \
--host=$ARCH-linux \
--disable-dependency-tracking \
--disable-shared \
--enable-static \
--with-pic \
$ADDITIONAL_CONFIGURE_FLAG
make clean
make -j4 install
make clean
cd ..
echo "FINISHED aac for $ARCH"
}
function build_freetype2
{
echo "Starting build freetype2 for $ARCH"
cd freetype2
./configure \
--prefix=$PREFIX \
--host=$ARCH-linux \
--disable-dependency-tracking \
--disable-shared \
--enable-static \
--with-pic \
$ADDITIONAL_CONFIGURE_FLAG
make clean
make -j4 install
make clean
cd ..
echo "FINISHED freetype2 for $ARCH"
}
function build_ass
{
echo "Starting build ass for $ARCH"
cd libass
./configure \
--prefix=$PREFIX \
--host=$ARCH-linux \
--disable-fontconfig \
--disable-dependency-tracking \
--disable-shared \
--enable-static \
--with-pic \
$ADDITIONAL_CONFIGURE_FLAG
make clean
make V=1 -j4 install
make clean
cd ..
echo "FINISHED ass for $ARCH"
}
function build_fribidi
{
echo "Starting build fribidi for $ARCH"
cd fribidi
./configure \
--prefix=$PREFIX \
--host=$ARCH-linux \
--disable-bin \
--disable-dependency-tracking \
--disable-shared \
--enable-static \
--with-pic \
$ADDITIONAL_CONFIGURE_FLAG
make clean
make -j4 install
make clean
cd ..
echo "FINISHED fribidi for $ARCH"
}
function build_ffmpeg
{
echo "Starting build ffmpeg for $ARCH"
cd ffmpeg
./configure --target-os=linux \
--prefix=$PREFIX \
--enable-cross-compile \
--extra-libs="-lgcc -L$PREFIX/lib/libx264.a" \
--arch=$ARCH \
--cc=$CC \
--cross-prefix=$CROSS_COMPILE \
--nm=$NM \
--sysroot=$PLATFORM \
--extra-cflags=" -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 $OPTIMIZE_CFLAGS" \
--disable-shared \
--enable-static \
--enable-runtime-cpudetect \
--pkg-config-flags="--static" \
--extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog -L$PREFIX/lib" \
--extra-cflags="-I$PREFIX/include" \
--disable-everything \
--enable-gpl \
--enable-pthreads \
--enable-libass \
--enable-libvo-aacenc \
--enable-libvo-amrwbenc \
--enable-hwaccel=h264_vaapi \
--enable-hwaccel=h264_vaapi \
--enable-hwaccel=h264_dxva2 \
--enable-hwaccel=mpeg4_vaapi \
--enable-libx264 \
--enable-demuxer=mov \
--enable-demuxer=h264 \
--enable-muxer=h264 \
--enable-demuxer=mpegvideo \
--enable-demuxer=h263 \
--enable-demuxer=mpegps \
--enable-demuxer=mjpeg \
--enable-demuxer=rtsp \
--enable-demuxer=rtp \
--enable-demuxer=hls \
--enable-demuxer=matroska \
--enable-muxer=rtsp \
--enable-muxer=mp4 \
--enable-muxer=mov \
--enable-muxer=mjpeg \
--enable-muxer=matroska \
--enable-protocol=crypto \
--enable-protocol=jni \
--enable-protocol=file \
--enable-protocol=rtp \
--enable-protocol=tcp \
--enable-protocol=udp \
--enable-protocol=applehttp \
--enable-protocol=hls \
--enable-protocol=http \
--enable-decoder=xsub \
--enable-decoder=jacosub \
--enable-decoder=dvdsub \
--enable-decoder=dvbsub \
--enable-decoder=subviewer \
--enable-decoder=rawvideo \
--enable-encoder=rawvideo \
--enable-decoder=mjpeg \
--enable-encoder=mjpeg \
--enable-decoder=h263 \
--enable-decoder=mpeg4 \
--enable-encoder=mpeg4 \
--enable-decoder=h264 \
--enable-encoder=h264 \
--enable-decoder=aac \
--enable-encoder=aac \
--enable-parser=h264 \
--enable-encoder=mp2 \
--enable-decoder=mp2 \
--enable-encoder=libvo_amrwbenc \
--enable-decoder=amrwb \
--enable-muxer=mp2 \
--enable-bsfs \
--enable-decoders \
--enable-encoders \
--enable-parsers \
--enable-hwaccels \
--enable-muxers \
--enable-avformat \
--enable-avcodec \
--enable-avresample \
--enable-zlib \
--disable-doc \
--disable-ffplay \
--disable-ffmpeg \
--disable-ffplay \
--disable-ffprobe \
--disable-ffserver \
--enable-avfilter \
--disable-avdevice \
--disable-opencl \
--enable-nonfree \
--enable-version3 \
--enable-memalign-hack \
--enable-asm \
$ADDITIONAL_CONFIGURE_FLAG
make clean
make -j4 install
make clean
cd ..
echo "FINISHED ffmpeg for $ARCH"
}
function build_one {
echo "Starting build one for $ARCH"
cd ffmpeg
${LD} -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -L$PREFIX/lib -soname $SONAME -shared -nostdlib -Bsymbolic --whole-archive --no-undefined -o $OUT_LIBRARY -lavformat -lavcodec -lavresample -lavutil -lswresample -lavfilter -lass -lfreetype -lfribidi -lswscale -lvo-aacenc -lvo-amrwbenc -lc -lm -lz -ldl -llog --dynamic-linker=/system/bin/linker -zmuldefs $PREBUILT/lib/gcc/$EABIARCH/$COMPILATOR_VERSION/libgcc.a
cd ..
echo "FINISHED one for $ARCH"
}
# enable additional architectures later on
#arm v5
#EABIARCH=arm-linux-androideabi
#ARCH=arm
#CPU=armv5
#OPTIMIZE_CFLAGS="-marm -march=$CPU"
#PREFIX=$(pwd)/ffmpeg-build/armeabi
#OUT_LIBRARY=$PREFIX/libffmpeg.so
#ADDITIONAL_CONFIGURE_FLAG=
#SONAME=libffmpeg.so
#PREBUILT=$ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-$COMPILATOR_VERSION/prebuilt/$OS_ARCH
#PLATFORM_VERSION=android-5
#setup_paths
#build_amr
#build_aac
#build_fribidi
#build_freetype2
#build_ass
#build_ffmpeg
#build_one
#x86
#EABIARCH=i686-linux-android
#ARCH=x86
#OPTIMIZE_CFLAGS="-m32"
#PREFIX=$(pwd)/ffmpeg-build/x86
#OUT_LIBRARY=$PREFIX/libffmpeg.so
#ADDITIONAL_CONFIGURE_FLAG=--disable-asm
#SONAME=libffmpeg.so
#PREBUILT=$ANDROID_NDK_HOME/toolchains/x86-$COMPILATOR_VERSION/prebuilt/$OS_ARCH
#PLATFORM_VERSION=android-9
#setup_paths
#build_amr
#build_aac
#build_fribidi
#build_freetype2
#build_ass
#build_ffmpeg
#build_one
#mips
#EABIARCH=mipsel-linux-android
#ARCH=mips
#OPTIMIZE_CFLAGS="-EL -march=mips32 -mips32 -mhard-float"
#PREFIX=$(pwd)/ffmpeg-build/mips
#OUT_LIBRARY=$PREFIX/libffmpeg.so
#ADDITIONAL_CONFIGURE_FLAG="--disable-mips32r2"
#SONAME=libffmpeg.so
#PREBUILT=$ANDROID_NDK_HOME/toolchains/mipsel-linux-android-$COMPILATOR_VERSION/prebuilt/$OS_ARCH
#PLATFORM_VERSION=android-9
#setup_paths
#build_amr
#build_aac
#build_fribidi
#build_freetype2
#build_ass
#build_ffmpeg
#build_one
#arm v7vfpv3
EABIARCH=arm-linux-androideabi
ARCH=arm
CPU=armv7-a
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=$CPU "
PREFIX=$(pwd)/ffmpeg-build/armeabi-v7a
OUT_LIBRARY=$PREFIX/libffmpeg.so
ADDITIONAL_CONFIGURE_FLAG=
SONAME=libffmpeg.so
PREBUILT=$ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-$COMPILATOR_VERSION/prebuilt/$OS_ARCH
PLATFORM_VERSION=android-5
setup_paths
build_x264
build_amr
build_aac
build_fribidi
build_freetype2
build_ass
build_ffmpeg
build_one
#arm v7 + neon (neon also include vfpv3-32)
EABIARCH=arm-linux-androideabi
ARCH=arm
CPU=armv7-a
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=neon -marm -march=$CPU -mtune=cortex-a8 -mthumb -D__thumb__ "
PREFIX=$(pwd)/ffmpeg-build/armeabi-v7a-neon
OUT_LIBRARY=../ffmpeg-build/armeabi-v7a/libffmpeg-neon.so
ADDITIONAL_CONFIGURE_FLAG=--enable-neon
SONAME=libffmpeg-neon.so
PREBUILT=$ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-$COMPILATOR_VERSION/prebuilt/$OS_ARCH
PLATFORM_VERSION=android-9
setup_paths
build_x264
build_amr
build_aac
build_fribidi
build_freetype2
build_ass
build_ffmpeg
build_one
echo "BUILD SUCCESS"
我暂时关闭了非arm架构。如果我可以提供任何其他信息来帮助找到问题，我将很乐意这样做。
我想知道问题是否可能是由脚本中缺少某些内容引起的，即 build_one 部分，虽然我试图直接在 --extra-ldflags 中指示 libx264.a，没有成功。
在build-one函数中，命令
${LD} -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -L$PREFIX/lib -soname $SONAME -shared -nostdlib -Bsymbolic --whole-archive --no-undefined -o $OUT_LIBRARY -lavformat -lavcodec -lavresample -lavutil -lswresample -lavfilter -lass -lfreetype -lfribidi -lswscale -lvo-aacenc -lvo-amrwbenc -lc -lm -lz -ldl -llog --dynamic-linker=/system/bin/linker -zmuldefs $PREBUILT/lib/gcc/$EABIARCH/$COMPILATOR_VERSION/libgcc.a
也应该使用-llx264.
您提到此库已放在 $PLATFORM/lib 中。使用 --whole-archive，库的顺序应该无关紧要，但为了安全起见，将此附魔紧跟在 -lavcodec 之后.如果您仍然有一些link错误，库的顺序可能会进行微调。
编辑
正如 Krzysztof Kansy 发现的那样，应该明确列出库文件，而不是使用 -l 符号。
我正在使用 Ubuntu 15.10 下的 appunite's project 使用 libx264 为 Android 构建 ffmpeg。我在没有 libx264 的情况下正确地构建了它，但是添加库总是给我 undefined reference to 'x264_picture_init' 和其他多个类似的错误。我通过邮寄 lists/other SO 问题尝试了各种可能的解决方案，但仍然没有帮助我解决问题。
我已经删除了 ffmpeg/libx264/libx264-dev 个包以避免系统中可能出现的重复库。我在 ffmpeg-build/ARCH/lib 中获得了 libx264.a 库，其他已构建的库位于此处。我也不认为这是由头文件与库不匹配引起的，因为系统中唯一的 x264.h 头文件是用于库构建的头文件。
这是我的build_android.sh。
set -x
if [ "$ANDROID_NDK_HOME" = "" ]; then
echo ANDROID_NDK_HOME variable not set, exiting
echo "Use: export ANDROID_NDK_HOME=/your/path/to/android-ndk"
exit 1
fi
# Get the newest arm-linux-androideabi version
if [ -z "$COMPILATOR_VERSION" ]; then
DIRECTORIES=$ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-*
for i in $DIRECTORIES; do
PROPOSED_NAME=${i#*$ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-}
if [[ $PROPOSED_NAME =~ ^[0-9\.]+$ ]] ; then
echo "Available compilator version: $PROPOSED_NAME"
COMPILATOR_VERSION=$PROPOSED_NAME
fi
done
fi
if [ -z "$COMPILATOR_VERSION" ]; then
echo "Could not find compilator"
exit 1
fi
if [ ! -d $ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-$COMPILATOR_VERSION ]; then
echo $ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-$COMPILATOR_VERSION does not exist
exit 1
fi
echo "Using compilator version: $COMPILATOR_VERSION"
OS_ARCH=`basename $ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-$COMPILATOR_VERSION/prebuilt/*`
echo "Using architecture: $OS_ARCH"
function setup_paths
{
export PLATFORM=$ANDROID_NDK_HOME/platforms/$PLATFORM_VERSION/arch-$ARCH/
if [ ! -d $PLATFORM ]; then
echo $PLATFORM does not exist
exit 1
fi
echo "Using platform: $PLATFORM"
export PATH=${PATH}:$PREBUILT/bin/
export CROSS_COMPILE=$PREBUILT/bin/$EABIARCH-
export CFLAGS=$OPTIMIZE_CFLAGS
export CPPFLAGS="$CFLAGS"
export CFLAGS="$CFLAGS"
export CXXFLAGS="$CFLAGS"
export CXX="${CROSS_COMPILE}g++ --sysroot=$PLATFORM"
export AS="${CROSS_COMPILE}gcc --sysroot=$PLATFORM"
export CC="${CROSS_COMPILE}gcc --sysroot=$PLATFORM"
export PKG_CONFIG="${CROSS_COMPILE}pkg-config"
export LD="${CROSS_COMPILE}ld"
export NM="${CROSS_COMPILE}nm"
export STRIP="${CROSS_COMPILE}strip"
export RANLIB="${CROSS_COMPILE}ranlib"
export AR="${CROSS_COMPILE}ar"
export LDFLAGS="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog"
export PKG_CONFIG_LIBDIR=$PREFIX/lib/pkgconfig/
export PKG_CONFIG_PATH=$PREFIX/lib/pkgconfig/
if [ ! -f "${CROSS_COMPILE}gcc" ]; then
echo "Gcc does not exists in path: ${CROSS_COMPILE}gcc"
exit 1;
fi
if [ ! -f "${PKG_CONFIG}" ]; then
echo "Pkg config does not exists in path: ${PKG_CONFIG} - Probably BUG in NDK but..."
set +e
SYS_PKG_CONFIG=$(which pkg-config)
if [ "$?" -ne 0 ]; then
echo "This system does not contain system pkg-config, so we can do anything"
exit 1
fi
set -e
cat > $PKG_CONFIG << EOF
#!/bin/bash
pkg-config $*
EOF
chmod u+x $PKG_CONFIG
echo "Because we have local pkg-config we will create it in ${PKG_CONFIG} directory using ${SYS_PKG_CONFIG}"
fi
}
function build_x264
{
echo "Starting build x264 for $ARCH"
cd x264
./configure --prefix=$PREFIX --host=$ARCH-linux --enable-static --disable-shared --enable-pic --disable-cli $ADDITIONAL_CONFIGURE_FLAG
make clean
make -j4 install
make clean
cd ..
echo "FINISHED x264 for $ARCH"
}
function build_amr
{
echo "Starting build amr for $ARCH"
cd vo-amrwbenc
./configure \
--prefix=$PREFIX \
--host=$ARCH-linux \
--disable-dependency-tracking \
--disable-shared \
--enable-static \
--with-pic \
$ADDITIONAL_CONFIGURE_FLAG
make clean
make -j4 install
make clean
cd ..
echo "FINISHED amr for $ARCH"
}
function build_aac
{
echo "Starting build aac for $ARCH"
cd vo-aacenc
./configure \
--prefix=$PREFIX \
--host=$ARCH-linux \
--disable-dependency-tracking \
--disable-shared \
--enable-static \
--with-pic \
$ADDITIONAL_CONFIGURE_FLAG
make clean
make -j4 install
make clean
cd ..
echo "FINISHED aac for $ARCH"
}
function build_freetype2
{
echo "Starting build freetype2 for $ARCH"
cd freetype2
./configure \
--prefix=$PREFIX \
--host=$ARCH-linux \
--disable-dependency-tracking \
--disable-shared \
--enable-static \
--with-pic \
$ADDITIONAL_CONFIGURE_FLAG
make clean
make -j4 install
make clean
cd ..
echo "FINISHED freetype2 for $ARCH"
}
function build_ass
{
echo "Starting build ass for $ARCH"
cd libass
./configure \
--prefix=$PREFIX \
--host=$ARCH-linux \
--disable-fontconfig \
--disable-dependency-tracking \
--disable-shared \
--enable-static \
--with-pic \
$ADDITIONAL_CONFIGURE_FLAG
make clean
make V=1 -j4 install
make clean
cd ..
echo "FINISHED ass for $ARCH"
}
function build_fribidi
{
echo "Starting build fribidi for $ARCH"
cd fribidi
./configure \
--prefix=$PREFIX \
--host=$ARCH-linux \
--disable-bin \
--disable-dependency-tracking \
--disable-shared \
--enable-static \
--with-pic \
$ADDITIONAL_CONFIGURE_FLAG
make clean
make -j4 install
make clean
cd ..
echo "FINISHED fribidi for $ARCH"
}
function build_ffmpeg
{
echo "Starting build ffmpeg for $ARCH"
cd ffmpeg
./configure --target-os=linux \
--prefix=$PREFIX \
--enable-cross-compile \
--extra-libs="-lgcc -L$PREFIX/lib/libx264.a" \
--arch=$ARCH \
--cc=$CC \
--cross-prefix=$CROSS_COMPILE \
--nm=$NM \
--sysroot=$PLATFORM \
--extra-cflags=" -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 $OPTIMIZE_CFLAGS" \
--disable-shared \
--enable-static \
--enable-runtime-cpudetect \
--pkg-config-flags="--static" \
--extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog -L$PREFIX/lib" \
--extra-cflags="-I$PREFIX/include" \
--disable-everything \
--enable-gpl \
--enable-pthreads \
--enable-libass \
--enable-libvo-aacenc \
--enable-libvo-amrwbenc \
--enable-hwaccel=h264_vaapi \
--enable-hwaccel=h264_vaapi \
--enable-hwaccel=h264_dxva2 \
--enable-hwaccel=mpeg4_vaapi \
--enable-libx264 \
--enable-demuxer=mov \
--enable-demuxer=h264 \
--enable-muxer=h264 \
--enable-demuxer=mpegvideo \
--enable-demuxer=h263 \
--enable-demuxer=mpegps \
--enable-demuxer=mjpeg \
--enable-demuxer=rtsp \
--enable-demuxer=rtp \
--enable-demuxer=hls \
--enable-demuxer=matroska \
--enable-muxer=rtsp \
--enable-muxer=mp4 \
--enable-muxer=mov \
--enable-muxer=mjpeg \
--enable-muxer=matroska \
--enable-protocol=crypto \
--enable-protocol=jni \
--enable-protocol=file \
--enable-protocol=rtp \
--enable-protocol=tcp \
--enable-protocol=udp \
--enable-protocol=applehttp \
--enable-protocol=hls \
--enable-protocol=http \
--enable-decoder=xsub \
--enable-decoder=jacosub \
--enable-decoder=dvdsub \
--enable-decoder=dvbsub \
--enable-decoder=subviewer \
--enable-decoder=rawvideo \
--enable-encoder=rawvideo \
--enable-decoder=mjpeg \
--enable-encoder=mjpeg \
--enable-decoder=h263 \
--enable-decoder=mpeg4 \
--enable-encoder=mpeg4 \
--enable-decoder=h264 \
--enable-encoder=h264 \
--enable-decoder=aac \
--enable-encoder=aac \
--enable-parser=h264 \
--enable-encoder=mp2 \
--enable-decoder=mp2 \
--enable-encoder=libvo_amrwbenc \
--enable-decoder=amrwb \
--enable-muxer=mp2 \
--enable-bsfs \
--enable-decoders \
--enable-encoders \
--enable-parsers \
--enable-hwaccels \
--enable-muxers \
--enable-avformat \
--enable-avcodec \
--enable-avresample \
--enable-zlib \
--disable-doc \
--disable-ffplay \
--disable-ffmpeg \
--disable-ffplay \
--disable-ffprobe \
--disable-ffserver \
--enable-avfilter \
--disable-avdevice \
--disable-opencl \
--enable-nonfree \
--enable-version3 \
--enable-memalign-hack \
--enable-asm \
$ADDITIONAL_CONFIGURE_FLAG
make clean
make -j4 install
make clean
cd ..
echo "FINISHED ffmpeg for $ARCH"
}
function build_one {
echo "Starting build one for $ARCH"
cd ffmpeg
${LD} -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -L$PREFIX/lib -soname $SONAME -shared -nostdlib -Bsymbolic --whole-archive --no-undefined -o $OUT_LIBRARY -lavformat -lavcodec -lavresample -lavutil -lswresample -lavfilter -lass -lfreetype -lfribidi -lswscale -lvo-aacenc -lvo-amrwbenc -lc -lm -lz -ldl -llog --dynamic-linker=/system/bin/linker -zmuldefs $PREBUILT/lib/gcc/$EABIARCH/$COMPILATOR_VERSION/libgcc.a
cd ..
echo "FINISHED one for $ARCH"
}
# enable additional architectures later on
#arm v5
#EABIARCH=arm-linux-androideabi
#ARCH=arm
#CPU=armv5
#OPTIMIZE_CFLAGS="-marm -march=$CPU"
#PREFIX=$(pwd)/ffmpeg-build/armeabi
#OUT_LIBRARY=$PREFIX/libffmpeg.so
#ADDITIONAL_CONFIGURE_FLAG=
#SONAME=libffmpeg.so
#PREBUILT=$ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-$COMPILATOR_VERSION/prebuilt/$OS_ARCH
#PLATFORM_VERSION=android-5
#setup_paths
#build_amr
#build_aac
#build_fribidi
#build_freetype2
#build_ass
#build_ffmpeg
#build_one
#x86
#EABIARCH=i686-linux-android
#ARCH=x86
#OPTIMIZE_CFLAGS="-m32"
#PREFIX=$(pwd)/ffmpeg-build/x86
#OUT_LIBRARY=$PREFIX/libffmpeg.so
#ADDITIONAL_CONFIGURE_FLAG=--disable-asm
#SONAME=libffmpeg.so
#PREBUILT=$ANDROID_NDK_HOME/toolchains/x86-$COMPILATOR_VERSION/prebuilt/$OS_ARCH
#PLATFORM_VERSION=android-9
#setup_paths
#build_amr
#build_aac
#build_fribidi
#build_freetype2
#build_ass
#build_ffmpeg
#build_one
#mips
#EABIARCH=mipsel-linux-android
#ARCH=mips
#OPTIMIZE_CFLAGS="-EL -march=mips32 -mips32 -mhard-float"
#PREFIX=$(pwd)/ffmpeg-build/mips
#OUT_LIBRARY=$PREFIX/libffmpeg.so
#ADDITIONAL_CONFIGURE_FLAG="--disable-mips32r2"
#SONAME=libffmpeg.so
#PREBUILT=$ANDROID_NDK_HOME/toolchains/mipsel-linux-android-$COMPILATOR_VERSION/prebuilt/$OS_ARCH
#PLATFORM_VERSION=android-9
#setup_paths
#build_amr
#build_aac
#build_fribidi
#build_freetype2
#build_ass
#build_ffmpeg
#build_one
#arm v7vfpv3
EABIARCH=arm-linux-androideabi
ARCH=arm
CPU=armv7-a
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=$CPU "
PREFIX=$(pwd)/ffmpeg-build/armeabi-v7a
OUT_LIBRARY=$PREFIX/libffmpeg.so
ADDITIONAL_CONFIGURE_FLAG=
SONAME=libffmpeg.so
PREBUILT=$ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-$COMPILATOR_VERSION/prebuilt/$OS_ARCH
PLATFORM_VERSION=android-5
setup_paths
build_x264
build_amr
build_aac
build_fribidi
build_freetype2
build_ass
build_ffmpeg
build_one
#arm v7 + neon (neon also include vfpv3-32)
EABIARCH=arm-linux-androideabi
ARCH=arm
CPU=armv7-a
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=neon -marm -march=$CPU -mtune=cortex-a8 -mthumb -D__thumb__ "
PREFIX=$(pwd)/ffmpeg-build/armeabi-v7a-neon
OUT_LIBRARY=../ffmpeg-build/armeabi-v7a/libffmpeg-neon.so
ADDITIONAL_CONFIGURE_FLAG=--enable-neon
SONAME=libffmpeg-neon.so
PREBUILT=$ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-$COMPILATOR_VERSION/prebuilt/$OS_ARCH
PLATFORM_VERSION=android-9
setup_paths
build_x264
build_amr
build_aac
build_fribidi
build_freetype2
build_ass
build_ffmpeg
build_one
echo "BUILD SUCCESS"
我暂时关闭了非arm架构。如果我可以提供任何其他信息来帮助找到问题，我将很乐意这样做。
我想知道问题是否可能是由脚本中缺少某些内容引起的，即 build_one 部分，虽然我试图直接在 --extra-ldflags 中指示 libx264.a，没有成功。
在build-one函数中，命令
${LD} -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -L$PREFIX/lib -soname $SONAME -shared -nostdlib -Bsymbolic --whole-archive --no-undefined -o $OUT_LIBRARY -lavformat -lavcodec -lavresample -lavutil -lswresample -lavfilter -lass -lfreetype -lfribidi -lswscale -lvo-aacenc -lvo-amrwbenc -lc -lm -lz -ldl -llog --dynamic-linker=/system/bin/linker -zmuldefs $PREBUILT/lib/gcc/$EABIARCH/$COMPILATOR_VERSION/libgcc.a
也应该使用-llx264.
您提到此库已放在 $PLATFORM/lib 中。使用 --whole-archive，库的顺序应该无关紧要，但为了安全起见，将此附魔紧跟在 -lavcodec 之后.如果您仍然有一些link错误，库的顺序可能会进行微调。
编辑
正如 Krzysztof Kansy 发现的那样，应该明确列出库文件，而不是使用 -l 符号。