Compilazione FFmpeg 2.3 con Android NDK R10

voglio compilare FFMpeg 2.3 con R10 NDK Android seguendo questo tutorial: http://www.roman10.net/how-to-build-ffmpeg-for-android/Compilazione FFmpeg 2.3 con Android NDK R10

Dopo aver ottenuto diversi errori ho modificato lo script di build in questo modo:

#!/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

Ma sfortunatamente ricevo il seguente errore:

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'

Qualsiasi aiuto sarebbe apprezzato. Grazie!

fonte

2014-07-20 Robin

Nel vostro costruire, ld cerca librerie di sistema statiche (libc.a, libz.a, ...) mentre dovrebbe essere alla ricerca per le versioni condivise di queste librerie.

C'è una bandiera -Bshared che può aiutare, ma per avere il pieno controllo di ciò che sta accadendo, suggerirei il seguente passo che collega:

$PREBUILT/bin/arm-linux-androideabi-ld -rpath-link=$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

Sembri non hanno bisogno gli eseguibili, in modo da poter aggiungere al vostro ./configure chiamata

--disable-ffmpeg 
--disable-ffprobe 
--disable-ffserver

e rimuovere le seguenti righe:

--extra-ldflags 
--extra-libs

fonte

2014-07-25 21:56:12

Sono stato abbastanza tempo fa ho aperto questo problema, ma mi sono imbattuto di nuovo in questo problema e la tua soluzione mi ha aiutato molto. Grazie quattro il tuo aiuto! ;-) – Robin

questo ha funzionato per me:

In primo luogo, fare una toolchain standalone:

android-ndk-r10/build/tools/make-standalone-toolchain.sh --platform=android-{your target here} --install-dir={pick a toolchain install directory}

Poi configurare ffmpeg usando la toolchain standalone che hai fatto:

./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

Credo che è necessario disabilitare perché non funziona per ARM.

Da lì puoi semplicemente "installare" e dovrebbe funzionare.

fonte

2014-07-25 00:35:04 bberg

Compilazione FFmpeg 2.3 con Android NDK R10

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