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  • Changer son thème graphique

    22 février 2011, par

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    Modifier le thème graphique utilisé
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  • Les formats acceptés

    28 janvier 2010, par

    Les commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
    ffmpeg -codecs ffmpeg -formats
    Les format videos acceptés en entrée
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    Les formats vidéos de sortie possibles
    Dans un premier temps on (...)

  • Initialisation de MediaSPIP (préconfiguration)

    20 février 2010, par

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Sur d’autres sites (10323)

  • ffmpeg libx264 neon optimization breaks execution

    27 janvier 2014, par nmxprime

    Hi use libx264 source obtained from x264-snapshot-20140122-2245 and compiling using below script

    NDK=~/Android/android-ndk-r7c
    
PLATFORM=$NDK/platforms/android-9/arch-arm/
    
PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86
    
function build_one
    
{
    
./configure --prefix=$PREFIX \
    
--sysroot=$PLATFORM \
    
--disable-avs \
    
--disable-lavf \
    
--disable-ffms \
    
--disable-gpac \
    
--cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
    
--host=arm-linux \
    
--enable-static \
    
--libdir=$PLATFORM/usr/lib \
    
--includedir=$PLATFORM/usr/include \
    
--extra-cflags="-march=armv7-a -mfloat-abi=softfp -mfpu=neon -mvectorize-with-neon-quad" \
    
--extra-ldflags="-Wl,--fix-cortex-a8" \
    
--enable-debug

    The config log is :

    platform:      ARM
    
system:        LINUX
    
cli:           yes
    
libx264:       internal
    
shared:        no
    
static:        yes
    
asm:           yes
    
interlaced:    yes
    
avs:           no
    
lavf:          no
    
ffms:          no
    
mp4:           no
    
gpl:           yes
    
thread:        no
    
opencl:        yes
    
filters:       crop select_every
    
debug:         yes
    
gprof:         no
    
strip:         no
    
PIC:           no
    
bit depth:     8
    
chroma format: all
    

    
You can run 'make' or 'make fprofiled' now.

    I hope the above code compiles and optimizes for NEON execution

    Doubts :

    Why Threads is no, because i didn't specified --disable-thread

    What is cli and it's significance here, also significance of opencl, such that libx264 uses opencl features ?

    Then i built ffmpeg 1.2.5with following script

    ./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 -lx264 $EXTRA_LD_FLAG" \
    
--disable-ffplay \
    
--disable-everything \
    
--enable-avformat \
    
--enable-avcodec \
    
--enable-libx264 \
    
--enable-gpl \
    
--enable-encoder=libx264 \
    
--enable-encoder=libx264rgb \
    
--enable-decoder=h264 \
    
--disable-network \
    
--disable-avfilter \
    
--disable-avdevice \
    
--enable-debug=3 \
    
$ADDITIONAL_CONFIGURE_FLAG

    where

    ADDITIONAL_CONFIGURE_FLAG = --enable-debug=3
    
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=neon -marm -march=$CPU -mvectorize-with-neon-quad"

    The log shows NEON supported.

    When i run the code (called in a while loop),

    ret = avcodec_encode_video2(c, &pkt, picture, &got_output);//avcodec_encode_video(c, finalout, outbuf_size, picture);
    

    
fprintf(stderr,"ret = %d, got-out = %d \n",ret,got_output);
    
if (ret < 0) 
    
        fprintf(stderr, "error encoding frame\n");
    

    
    if (got_output) 
    
        fprintf(stderr,"encoding frame %3d (size=%5d): (ret=%d)\n", 1, pkt.size,ret);

    it runs for 2 or 3 time(during which if(got_output) is not true), then i get SIGSEGV. Tried addr2line and ndk-stack but no use[Though i enabled debug info, ndk-stack cannot find routine info].

    I edited libx264's encoder.c code with some fprintf statements.
    Posting snippet of code

       if( h->frames.i_input <= h->frames.i_delay + 1 - h->i_thread_frames )
    
    {
    
        /* Nothing yet to encode, waiting for filling of buffers */
    
        pic_out->i_type = X264_TYPE_AUTO;
    
fprintf(stderr,"EditLog:: Returns as waiting for filling \n"); //edit
    
        return 0;
    
    }
    
}
    

    
else
    
{
    
    /* signal kills for lookahead thread */
    
    x264_pthread_mutex_lock( &h->lookahead->ifbuf.mutex );
    
    h->lookahead->b_exit_thread = 1;
    
    x264_pthread_cond_broadcast( &h->lookahead->ifbuf.cv_fill );
    
    x264_pthread_mutex_unlock( &h->lookahead->ifbuf.mutex );
    
}
    
fprintf(stderr,"After wait for fill \n");
    
fprintf(stderr,"h: %p \n",h); //edit
    
fprintf(stderr,"h->i_frame = %p \n",&h->i_frame); //edit
    
h->i_frame++;
    
fprintf(stderr,"after i_frame++");

    in log, i don't see after i_frame++, here occurs (may be) the SIGSEGV.

    Please help in solving it. The same works without neon optimization !!

  • android ffmpeg for multiple arch

    15 avril 2014, par misgood

    I'm building ffmpeg for android. It works fine with arm but fail with x86.

    compilation is ok. But if I run the apk which use this x86 ffmpeg lib, logcat will print following errors :

    04-13 10:30:09.862: E/dalvikvm(1262): dlopen("/data/app-lib/com.misgood.ipcamdemo-2/libplayer.so") failed: Cannot load library: soinfo_link_image(linker.cpp:1635): could not load library "libavformat-55.so" needed by "libplayer.so"; caused by load_library(linker.cpp:745): library "libavformat-55.so" not found

    I'd checked apk file. All shared libraries are exist.

    I guess the problem is the libraries is not config properly.

    Any suggestions would be appreciated.

    Here is the script that I use to building ffmpeg for android arm and x86

    #!/bin/bash
    
NDK=$HOME/android-ndk-r9c
    

    
function build_core
    
{
    
./configure \
    
    --prefix=$PREFIX \
    
    --enable-shared \
    
    --disable-static \
    
    --disable-doc \
    
    --disable-ffmpeg \
    
    --disable-ffplay \
    
    --disable-ffprobe \
    
    --disable-ffserver \
    
    --disable-avdevice \
    
    --disable-doc \
    
    --disable-symver \
    
    --disable-error-resilience \
    
    --disable-decoder=h263p \
    
    --disable-decoder=mpegvideo \
    
    --target-os=linux \
    
    --enable-cross-compile \
    
    --sysroot=$SYSROOT \
    
    --extra-cflags="-std=c99 -O3 -fpic -DANDROID $ADDI_CFLAGS" \
    
    --extra-ldflags="$ADDI_LDFLAGS" \
    
    $ARCH_SPEC \
    
    $ADDITIONAL_CONFIGURE_FLAG
    
make clean
    
make -j4
    
make install
    
}
    

    
function build_arm
    
{
    
SYSROOT=$NDK/platforms/android-19/arch-arm/
    
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64
    
CPU=arm
    
PREFIX=$(pwd)/android/$CPU 
    
ADDI_CFLAGS="-marm"
    
ARCH_SPEC="--arch=arm \
    
    --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
    
"
    
build_core
    
}
    

    
function build_x86
    
{
    
SYSROOT=$NDK/platforms/android-19/arch-x86/
    
TOOLCHAIN=$NDK/toolchains/x86-4.8/prebuilt/linux-x86_64
    
CPU=x86
    
PREFIX=$(pwd)/android/$CPU 
    
ADDI_CFLAGS="-mincoming-stack-boundary=4 -march=i686 -mtune=atom -mstackrealign -msse3 -mfpmath=sse -m32"
    
ARCH_SPEC="--arch=x86 \
    
    --cross-prefix=$TOOLCHAIN/bin/i686-linux-android- \
    
    --cpu=i686
    
"
    
build_core
    
}
    

    
build_x86

  • How to Compile FFmpeg with x264 and libfdk-aac for Android

    12 novembre 2016, par Codeveloper

    Everyone.

    Please understand that i use the wrong english.

    I want to make encoding application using FFmpeg.

    I was successfully building NDK with FFmpeg.

    However, to encode H.264 video made had failed( Codec not found.. ).

    I was learned that libx264 is need encode H.264 and libfdk-aac is need encode AAC.

    so I tried to build the libx264 and libfdk-aac, But does not easily cross-compile.

    Please tell me what I did wrong.

    My Development Environment

    OS : ubuntu 13.10 64bit

    NDK : android-ndk-r9

    FFmpeg : ffmpeg-2.0.2

    x264 build : build_x264_android.sh

    NDK=$ANDROID_NDK_HOME
    

    
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64
    
PLATFORM=$NDK/platforms/android-9/arch-arm
    
CPU=arm
    
PREFIX=$NDK/sources/ffmpeg-2.0.2/android/$CPU
    

    
./configure --prefix=$PREFIX \
    
    --enable-shared \
    
    --enable-pic \
    
    --disable-asm \
    
    --disable-cli \
    
    --host=arm-linux \
    
    --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
    
    --sysroot=$PLATFORM
    

    
make
    
make install
    
ldconfig

    fdk-aac build : build_aac_android.sh

    NDK=$ANDROID_NDK_HOME
    
CROSS_PREFIX=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-
    
PLATFORM=$NDK/platforms/android-9/arch-arm
    
CPU=arm
    
PREFIX=$NDK/sources/ffmpeg-2.0.2/android/$CPU
    
OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=armv7-a -mthumb -D__thumb__"
    

    
./configure --prefix=$PREFIX \
    
    --with-sysroot=$PLATFORM \
    
    --host=arm-linux \
    
    --enable-shared \
    
    --with-pic=no \
    
    CC="${CROSS_PREFIX}gcc --sysroot=$PLATFORM" \
    
    CXX="${CROSS_PREFIX}g++ --sysroot=$PLATFORM" \
    
    RANLIB="${CROSS_PREFIX}ranlib" \
    
    AR="${CROSS_PREFIX}ar" \
    
    STRIP="${CROSS_PREFIX}strip" \
    
    NM="${CROSS_PREFIX}nm" \
    
    CFLAGS="-O3 $OPTIMIZE_CFLAGS --sysroot=$PLATFORM" \
    
    CXXFLAGS="-O3 $OPTIMIZE_CFLAGS --sysroot=$PLATFORM"
    

    
make
    
make install

    When I run ’build_aac_android.sh’, shown error.

    log in config.log

    configure:2907: checking for arm-linux-gcc
    
configure:2934: result: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm
    
configure:3203: checking for C compiler version
    
configure:3212: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm --version >&5
    
./configure: line 3214: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory
    
configure:3223: $? = 127
    
configure:3212: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm -v >&5
    
./configure: line 3214: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory
    
configure:3223: $? = 127
    
configure:3212: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm -V >&5
    
./configure: line 3214: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory
    
configure:3223: $? = 127
    
configure:3212: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm -qversion >&5
    
./configure: line 3214: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory
    
configure:3223: $? = 127
    
configure:3243: checking whether the C compiler works
    
configure:3265: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm -O3 -mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=armv7-a -mthumb -D__thumb__ --sysroot=/platforms/android-9/arch-arm   conftest.c  >&5
    
./configure: line 3267: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory
    

    
configure:3312: error: in `/home/nel/android-ndk-r9/sources/ffmpeg-2.0.2/libfdk-aac':
    
    configure:3314: error: C compiler cannot create executables
    
    See `config.log' for more details

    I cannot understand that error !! I was confirmed that arm-linux-androideabi-gcc is found in the directory..

    I want to borrow you wisdom. Please tell me how to ’ffmpeg+x264+fdk-aac’ build for android.

    Thanks.. :-)

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