Compiler FFmpeg 2.3 avec Android NDK r10
je veux compiler FFMpeg 2.3 avec Android NDK r10 en suivant ce tutoriel: http://www.roman10.net/how-to-build-ffmpeg-for-android /
après avoir reçu plusieurs erreurs, j'ai modifié le script de construction comme ceci:
#!/bin/bash
######################################################
# Usage:
# put this script in top of FFmpeg source tree
# ./build_android
# It generates binary for following architectures:
# ARMv6
# ARMv6+VFP
# ARMv7+VFPv3-d16 (Tegra2)
# ARMv7+Neon (Cortex-A8)
# Customizing:
# 1. Feel free to change ./configure parameters for more features
# 2. To adapt other ARM variants
# set $CPU and $OPTIMIZE_CFLAGS
# call build_one
######################################################
NDK=/usr/local/src/android-ndk-r10
PLATFORM=$NDK/platforms/android-8/arch-arm/
PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64
function build_one
{
./configure --target-os=linux
--prefix=$PREFIX
--enable-cross-compile
--extra-libs="-lgcc"
--arch=arm
--cc=$PREBUILT/bin/arm-linux-androideabi-gcc
--cross-prefix=$PREBUILT/bin/arm-linux-androideabi-
--nm=$PREBUILT/bin/arm-linux-androideabi-nm
--sysroot=$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 $OPTIMIZE_CFLAGS "
--disable-shared
--enable-static
--extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog"
--disable-everything
--enable-demuxer=mov
--enable-demuxer=h264
--disable-ffplay
--enable-protocol=file
--enable-avformat
--enable-avcodec
--enable-decoder=rawvideo
--enable-decoder=mjpeg
--enable-decoder=h263
--enable-decoder=h265
--enable-decoder=mpeg4
--enable-decoder=h264
--enable-parser=h264
--enable-parser=h265
--enabled-network
--enable-zlib
--disable-avfilter
--disable-avdevice
$ADDITIONAL_CONFIGURE_FLAG
make clean
make -j4 install
$PREBUILT/bin/arm-linux-androideabi-ar d libavcodec/libavcodec.a inverse.o
$PREBUILT/bin/arm-linux-androideabi-ld -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -soname libffmpeg.so -nostdlib,noexecstack -Bsymbolic --whole-archive --no-undefined -o $PREFIX/libffmpeg.so libavcodec/libavcodec.a libavformat/libavformat.a libavutil/libavutil.a libswscale/libswscale.a -lc -lm -lz -ldl -llog --dynamic-linker=/system/bin/linker $PREBUILT/lib/gcc/arm-linux-androideabi/4.8/libgcc.a
}
#arm v6
#CPU=armv6
#OPTIMIZE_CFLAGS="-marm -march=$CPU"
#PREFIX=./android/$CPU
#ADDITIONAL_CONFIGURE_FLAG=
#build_one
#arm v7vfpv3
CPU=armv7-a
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=$CPU "
PREFIX=./android/$CPU
ADDITIONAL_CONFIGURE_FLAG=
build_one
#arm v7vfp
#CPU=armv7-a
#OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU "
#PREFIX=./android/$CPU-vfp
#ADDITIONAL_CONFIGURE_FLAG=
#build_one
#arm v7n
#CPU=armv7-a
#OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=neon -marm -march=$CPU -mtune=cortex-a8"
#PREFIX=./android/$CPU
#ADDITIONAL_CONFIGURE_FLAG=--enable-neon
#build_one
#arm v6+vfp
#CPU=armv6
#OPTIMIZE_CFLAGS="-DCMP_HAVE_VFP -mfloat-abi=softfp -mfpu=vfp -marm -march=$CPU"
#PREFIX=./android/${CPU}_vfp
#ADDITIONAL_CONFIGURE_FLAG=
#build_one
Mais malheureusement j'obtiens l'erreur suivante:
INSTALL ffmpeg
INSTALL ffprobe
INSTALL ffserver
/usr/local/src/android-ndk-r10/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld: error: /usr/local/src/android-ndk-r10/platforms/android-8/arch-arm//usr/lib/libc.a(eventfd.o): multiple definition of 'eventfd'
/usr/local/src/android-ndk-r10/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld: /usr/local/src/android-ndk-r10/platforms/android-8/arch-arm//usr/lib/libc.a(eventfd.o): previous definition here
/usr/local/src/android-ndk-r10/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld: error: /usr/local/src/android-ndk-r10/platforms/android-8/arch-arm//usr/lib/libc.a(_rand48.o): multiple definition of '__dorand48'
/usr/local/src/android-ndk-r10/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld: /usr/local/src/android-ndk-r10/platforms/android-8/arch-arm//usr/lib/libc.a(_rand48.o): previous definition here
/usr/local/src/android-ndk-r10/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld: error: /usr/local/src/android-ndk-r10/platforms/android-8/arch-arm//usr/lib/libc.a(_rand48.o): multiple definition of '__rand48_mult'
/usr/local/src/android-ndk-r10/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld: /usr/local/src/android-ndk-r10/platforms/android-8/arch-arm//usr/lib/libc.a(_rand48.o): previous definition here
/usr/local/src/android-ndk-r10/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld: error: /usr/local/src/android-ndk-r10/platforms/android-8/arch-arm//usr/lib/libc.a(_rand48.o): multiple definition of '__rand48_add'
/usr/local/src/android-ndk-r10/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld: /usr/local/src/android-ndk-r10/platforms/android-8/arch-arm//usr/lib/libc.a(_rand48.o): previous definition here
/usr/local/src/android-ndk-r10/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld: error: /usr/local/src/android-ndk-r10/platforms/android-8/arch-arm//usr/lib/libc.a(_rand48.o): multiple definition of '__rand48_seed'
/usr/local/src/android-ndk-r10/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld: /usr/local/src/android-ndk-r10/platforms/android-8/arch-arm//usr/lib/libc.a(_rand48.o): previous definition here
/usr/local/src/android-ndk-r10/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld: error: /usr/local/src/android-ndk-r10/platforms/android-8/arch-arm//usr/lib/libm.a(s_scalbn.o): multiple definition of 'ldexp'
/usr/local/src/android-ndk-r10/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld: /usr/local/src/android-ndk-r10/platforms/android-8/arch-arm//usr/lib/libc.a(ldexp.o): previous definition here
/usr/local/src/android-ndk-r10/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld: error: cannot find -lz
/usr/local/src/android-ndk-r10/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld: error: cannot find -ldl
/usr/local/src/android-ndk-r10/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld: error: cannot find -llog
libavformat/http.c:384: error: undefined reference to 'inflateEnd'
libavformat/http.c:385: error: undefined reference to 'inflateInit2_'
libavformat/http.c:390: error: undefined reference to 'zlibCompileFlags'
libavformat/http.c:1029: error: undefined reference to 'inflateEnd'
libavformat/http.c:867: error: undefined reference to 'inflate'
libavformat/id3v2.c:840: error: undefined reference to 'uncompress'
libavformat/mov.c:2934: error: undefined reference to 'uncompress'
bionic/libc/bionic/drand48.c:24: error: undefined reference to '_rand48_seed'
bionic/libc/bionic/erand48.c:21: error: undefined reference to '_dorand48'
Toute aide serait appréciée. Je vous remercie!
2 réponses
Dans votre construction, ld recherche statique du système libs ( libc.un , libz.un , ...) alors qu'il devrait être à la recherche des versions partagées de ces bibliothèques.
il y a un - bshared drapeau qui peut aider, mais pour avoir le plein contrôle de ce qui se passe, je suggérerais l'étape de lien suivante:
$PREBUILT/bin/arm-linux-androideabi-ld -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib \
-soname libffmpeg.so -nostdlib,noexecstack -Bsymbolic \
--whole-archive --no-undefined \
-o $PREFIX/libffmpeg.so libavcodec/libavcodec.a libavformat/libavformat.a \
libavutil/libavutil.a libswscale/libswscale.a \
$PLATFORM/usr/lib/libc.so $PLATFORM/usr/lib/libm.so \
$PLATFORM/usr/lib/libz.so \
$PLATFORM/usr/lib/libdl.so $PLATFORM/usr/lib/liblog.so \
--dynamic-linker=/system/bin/linker \
$PREBUILT/lib/gcc/arm-linux-androideabi/4.8/libgcc.a
vous ne semblez pas avoir besoin des exécutables, donc vous pouvez ajouter à votre ./configure
appel
--disable-ffmpeg
--disable-ffprobe
--disable-ffserver
et supprimer les lignes suivantes:
--extra-ldflags
--extra-libs
cela a fonctionné pour moi:
tout d'abord, faire une chaîne d'outils autonome:
android-ndk-r10/build/tools/make-standalone-toolchain.sh --platform=android-{your target here} --install-dir={pick a toolchain install directory}
puis configurer ffmpeg en utilisant la chaîne d'outils autonome que vous avez créée:
./configure \
--prefix={where you want to install ffmpeg to} \
--cross-prefix={standalone toolchain install dir}/bin/arm-linux-androideabi- \
--target-os=linux \
--arch=arm \
--enable-cross-compile \
--sysroot={standaline toolchain install dir}/sysroot \
--disable-yasm
je pense que vous devez désactiver yasm depuis QU'il ne fonctionne pas pour ARM.
de là, vous pouvez juste" faire installer " et il devrait fonctionner.