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Autres articles (39)
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MediaSPIP v0.2
21 juin 2013, parMediaSPIP 0.2 est la première version de MediaSPIP stable.
Sa date de sortie officielle est le 21 juin 2013 et est annoncée ici.
Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
Comme pour la version précédente, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...) -
Mise à disposition des fichiers
14 avril 2011, parPar défaut, lors de son initialisation, MediaSPIP ne permet pas aux visiteurs de télécharger les fichiers qu’ils soient originaux ou le résultat de leur transformation ou encodage. Il permet uniquement de les visualiser.
Cependant, il est possible et facile d’autoriser les visiteurs à avoir accès à ces documents et ce sous différentes formes.
Tout cela se passe dans la page de configuration du squelette. Il vous faut aller dans l’espace d’administration du canal, et choisir dans la navigation (...) -
MediaSPIP version 0.1 Beta
16 avril 2011, parMediaSPIP 0.1 beta est la première version de MediaSPIP décrétée comme "utilisable".
Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
Pour avoir une installation fonctionnelle, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...)
Sur d’autres sites (4754)
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Check for a valid iframe response before trying to access the iframe body’s text
29 décembre 2012, par Patrick McKinnonm js/jquery.iframe-transport.js Check for a valid iframe response before trying to access the iframe body’s text - When the iframe transport is used for a cross-origin upload, the iframe response body canot be accessed from javascript.
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Encoding RGB frames using x264 and AVCodec in C
6 novembre 2016, par deepworkI 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 \
${MODULES} \
--disable-doc \
--enable-neon
make clean
make
make install
}
build_ARMv6
echo Android ARMEABI builds finishedHow i built x264 :
NDK=D:/AndroidDev/android-ndk-r9
PLATFORM=$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 deepworkI 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 \
${MODULES} \
--disable-doc \
--enable-neon
make clean
make
make install
}
build_ARMv6
echo Android ARMEABI builds finishedHow i built x264 :
NDK=D:/AndroidDev/android-ndk-r9
PLATFORM=$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