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  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • 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

  • Librairies et binaires spécifiques au traitement vidéo et sonore

    31 janvier 2010, par

    Les logiciels et librairies suivantes sont utilisées par SPIPmotion d’une manière ou d’une autre.
    Binaires obligatoires FFMpeg : encodeur principal, permet de transcoder presque tous les types de fichiers vidéo et sonores dans les formats lisibles sur Internet. CF ce tutoriel pour son installation ; Oggz-tools : outils d’inspection de fichiers ogg ; Mediainfo : récupération d’informations depuis la plupart des formats vidéos et sonores ;
    Binaires complémentaires et facultatifs flvtool2 : (...)

Sur d’autres sites (9769)

  • 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

  • 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

  • FFMPEG : Adding font to Video gives error

    7 juin 2016, par janki gadhiya

    I am trying to execute ffmpeg on android. I have successfully executed 2-3 commands also. But i am stuck at one point where i am adding text to the video.

    Here is the command i am executing.

    NOT WORKING : because the text argument has a space between two words.

    "-i "+path+"out.mp4 -vf drawtext=fontfile="+path+"f1.ttf:text='Stack OverFlow' -y -c:v libx264 -c:a copy -movflags +faststart "+path+"output.mp4"

    WORKING : just removed space.

    "-i "+path+"out.mp4 -vf drawtext=fontfile="+path+"f1.ttf:text='StackOverFlow' -y -c:v libx264 -c:a copy -movflags +faststart "+path+"output.mp4"

    Here path contains my external Sd card’s path. out.mp4 and f1.ttf exists in my folder.

    My Question is why it is not working with space.

    Here is the stack trace i am getting.

    FAILED with output : WARNING: linker: /data/data/com.github.hiteshsondhi88.sampleffmpeg/files/ffmpeg has text relocations. This is wasting memory and prevents security hardening. Please fix.
    
ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
    
built with gcc 4.8 (GCC)
    
configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/i686-linux-android- --arch=x86 --cpu=i686 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/x86 --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -march=i686' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
    
libavutil      55. 17.103 / 55. 17.103
    
libavcodec     57. 24.102 / 57. 24.102
    
libavformat    57. 25.100 / 57. 25.100
    
libavdevice    57.  0.101 / 57.  0.101
    
libavfilter     6. 31.100 /  6. 31.100
    
libswscale      4.  0.100 /  4.  0.100
    
libswresample   2.  0.101 /  2.  0.101
    
libpostproc    54.  0.100 / 54.  0.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Testing/out.mp4':
    
Metadata:
    
major_brand     : isom
    
minor_version   : 512
    
compatible_brands: isomiso2avc1mp41
    
encoder         : Lavf57.25.100
    
Duration: 00:00:05.00, start: 0.000000, bitrate: 117 kb/s
    
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 300x300 [SAR 40:33 DAR 40:33], 113 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    
Metadata:
    
handler_name    : VideoHandler
    
[NULL @ 0xb585f000] Unable to find a suitable output format for 'text='Stack'
    
text='Stack: Invalid argument

    Why it is saying invalid argument. It will be great if any ffmpeg expert can guide me in what i am doing wrong here.

    I have refered this Question of SO : Text on video ffmpeg

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