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    18 février 2011, par

    Pour gérer l’ajout et la suppression de fonctionnalités supplémentaires (ou plugins), MediaSPIP utilise à partir de la version 0.2 SVP.
    SVP permet l’activation facile de plugins depuis l’espace de configuration de MediaSPIP.
    Pour y accéder, il suffit de se rendre dans l’espace de configuration puis de se rendre sur la page "Gestion des plugins".
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    12 avril 2011, par

    Il est également possible d’activer l’inscription des visiteurs ce qui permettra à tout un chacun d’ouvrir soit même un compte sur le canal en question dans le cadre de projets ouverts par exemple.
    Pour ce faire, il suffit d’aller dans l’espace de configuration du site en choisissant le sous menus "Gestion des utilisateurs". Le premier formulaire visible correspond à cette fonctionnalité.
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  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

Sur d’autres sites (7850)

  • 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.. :-)

  • FFmpeg error : ratecontrol_init : can't open stats file

    6 octobre 2017, par oldo.nicho

    I’ve setup an AWS EC2 instance running Ubuntu 14.04 and have installed FFmpeg so that I can compress and transcode video.

    I’m trying to do a two pass conversion with the following code :

    ffmpeg -i input-file.avi -codec:v libx264 -profile:v high -preset slow -b:v 500k -maxrate 500k -bufsize 1000k -vf scale=702:-1 -threads 0 -pass 1 -an -f mp4 ~/encoded/null

    and second pass :

    ffmpeg -i input-file.avi -codec:v libx264 -profile:v high -preset slow -b:v 500k -maxrate 500k -bufsize 1000k -vf scale=702:-1 -threads 0 -pass 2 -codec:a libfdk_aac -b:a 128k -f mp4 output-file.mp4

    However I get the following error :

    ffmpeg version N-77283-g91c2a33 Copyright (c) 2000-2015 the FFmpeg developers
    
  built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04)
    
  configuration: --prefix=/home/ubuntu/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/ubuntu/ffmpeg_build/include --extra-ldflags=-L/home/ubuntu/ffmpeg_build/lib --bindir=/home/ubuntu/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libx264 --enable-nonfree
    
  libavutil      55. 11.100 / 55. 11.100
    
  libavcodec     57. 17.100 / 57. 17.100
    
  libavformat    57. 20.100 / 57. 20.100
    
  libavdevice    57.  0.100 / 57.  0.100
    
  libavfilter     6. 21.100 /  6. 21.100
    
  libswscale      4.  0.100 /  4.  0.100
    
  libswresample   2.  0.101 /  2.  0.101
    
  libpostproc    54.  0.100 / 54.  0.100
    
Input #0, avi, from 'input-file.avi':
    
  Duration: 01:18:05.29, start: 0.000000, bitrate: 2025 kb/s
    
    Stream #0:0: Video: mpeg4 (Simple Profile) (XVID / 0x44495658), yuv420p, 720x480 [SAR 1:1 DAR 3:2], 1789 kb/s, 29.97 fps, 29.97 tbr, 29.97 tbn, 29.97 tbc
    
    Stream #0:1: Audio: ac3 ([0] [0][0] / 0x2000), 48000 Hz, stereo, fltp, 224 kb/s
    
[libx264 @ 0x1e04240] using SAR=1/1
    
[libx264 @ 0x1e04240] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX AVX2 FMA3 LZCNT BMI2
    
[libx264 @ 0x1e04240] ratecontrol_init: can't open stats file
    
Output #0, mp4, to '/home/ubuntu/encoded/null':
    
    Stream #0:0: Video: h264, none, q=2-31, 128 kb/s, SAR 1:1 DAR 0:0, 29.97 fps
    
    Metadata:
    
      encoder         : Lavc57.17.100 libx264
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (mpeg4 (native) -> h264 (libx264))
    
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

    The command as written above works fine on my local computer (running OSX). Would anyone have any suggestions as to how to fix this problem ?

  • Encoding RGB frames using x264 and AVCodec in C

    6 novembre 2016, par deepwork

    I have RGB24 frames streamed from camera and i want to encode them into h264 ,i found that AVCodec and x264 can do so, the problem is x264 as default accepts YUV420 as input so what i wrote was a program which convert RGB frames to YUV420 .that was by sws_scale function .this works well except that it does not satisfy the required FPS because the converting (RGB->YUV420) takes time.

    This is how i setup my encoder context :

    videoStream->id = 0;
    
vCodecCtx = videoStream->codec;
    

    
vCodecCtx->coder_type       = AVMEDIA_TYPE_VIDEO;
    
vCodecCtx->codec_id         = AV_CODEC_ID_H264;
    
vCodecCtx->bit_rate         = 400000;
    
vCodecCtx->width            = Width;
    
vCodecCtx->height           = Height;
    
vCodecCtx->time_base.den    = FPS;
    
vCodecCtx->time_base.num    = 1;
    
//vCodecCtx->time_base      = (AVRational){1,};
    
vCodecCtx->gop_size         = 12;
    
vCodecCtx->max_b_frames     = 1;
    
vCodecCtx->pix_fmt          = AV_PIX_FMT_YUV420P;
    

    
if(formatCtx->oformat->flags & AVFMT_GLOBALHEADER)
    
    vCodecCtx->flags |= CODEC_FLAG_GLOBAL_HEADER;
    

    
av_opt_set(vCodecCtx->priv_data, "preset", "ultrafast", 0);
    
av_opt_set(vCodecCtx->priv_data, "profile", "baseline", AV_OPT_SEARCH_CHILDREN);
    

    
if (avcodec_open2(vCodecCtx, h264Codec, NULL) < 0){
    
    return 0;
    
}

    when i changes AV_PIX_FMT_YUV420P to AV_PIX_FMT_RGB24 ,avcodec_open2 will fail.
    i read that there is a version of libx264 for RGB called libx264rgb but i even dont know whether i have to rebuild x264 with enabling this option or to download another source or i have to do it programmatically with the first x264 lib.

    the question is how to enable RGB as input to libx264 to use with libavcodec in C .or how to make the encoding or sws_scale more fast .

    Edit :

    How i built ffmpeg :

    NDK=D:/AndroidDev/android-ndk-r9
    
PLATFORM=$NDK/platforms/android-18/arch-arm/
    
PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/windows-x86_64
    

    
GENERAL="\
    
--enable-small \
    
--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 \
    
--extra-cflags="-I../x264/android/arm/include" \
    
--extra-ldflags="-L../x264/android/arm/lib" "
    

    

    
MODULES="\
    
--enable-gpl \
    
--enable-libx264"
    

    
function build_ARMv6
    
{
    
  ./configure \
    
  --target-os=linux \
    
  --prefix=./android/armeabi \
    
  ${GENERAL} \
    
  --sysroot=$PLATFORM \
    
  --enable-shared \
    
  --disable-static \
    
  --extra-cflags=" -O3 -fpic -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 -mfloat-abi=softfp -mfpu=vfp -marm -march=armv6" \
    
  --extra-ldflags="-lx264 -Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog" \
    
  --enable-zlib \
    
  ${MODULES} \
    
  --disable-doc \
    
  --enable-neon
    

    
  make clean
    
  make
    
  make install
    
}
    

    
build_ARMv6
    

    
echo Android ARMEABI builds finished

    How i built x264 :

    NDK=D:/AndroidDev/android-ndk-r9
    
PLATFORM=$NDK/platforms/android-18/arch-arm/
    
TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/windows-x86_64
    
PREFIX=./android/arm
    

    
function build_one
    
{
    
  ./configure \
    
  --prefix=$PREFIX \
    
  --enable-static \
    
  --enable-pic \
    
  --host=arm-linux \
    
  --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
    
  --sysroot=$PLATFORM
    

    
  make clean
    
  make
    
  make install
    
}
    

    
build_one
    

    
echo Android ARM builds finished

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