Recherche avancée

Médias (0)

Mot : - Tags -/xmp

Aucun média correspondant à vos critères n’est disponible sur le site.

Autres articles (72)

  • Gestion des droits de création et d’édition des objets

    8 février 2011, par

    Par défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;

  • Dépôt de média et thèmes par FTP

    31 mai 2013, par

    L’outil MédiaSPIP traite aussi les média transférés par la voie FTP. Si vous préférez déposer par cette voie, récupérez les identifiants d’accès vers votre site MédiaSPIP et utilisez votre client FTP favori.
    Vous trouverez dès le départ les dossiers suivants dans votre espace FTP : config/ : dossier de configuration du site IMG/ : dossier des média déjà traités et en ligne sur le site local/ : répertoire cache du site web themes/ : les thèmes ou les feuilles de style personnalisées tmp/ : dossier de travail (...)

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

Sur d’autres sites (11840)

  • iOS SDK avcodec_decode_video Optimization

    6 août 2013, par Johny Cage

    I've recently started a project that relies on streaming FLV directly to an iOS device. As most famous i went with ffmpeg (and an iOS wrapper - kxmovie). To my surprise iPhone 4 is incapable of playing even SD low-bitrate FLV videos. The current implementation i'm using is decoding the video/audio/sub frames in dispatch_async while loop and copies the YUV frame data to a object, where the object is parsed to 3 textures - Y/U/V (in case of RGB color space - just parse the data) and rendered on screen. After much trial and error, i've decided to kill the whole rendering pipeline and leave only the avcodec_decode_video2 function to run. Surprisingly the FPS did not improve and videos are still unplayable.

    My question is : What can i do to improve the performance of avcodec_decode_video2 ?

    Note :
    I've tried a few commercial apps and they play the same file perfectly fine with no more than 50-60% cpu usage.

    The library is based off the 1.2 branch and this is are the build args :

    '--arch=arm',
    
'--cpu=cortex-a8',
    
'--enable-pic',
    
"--extra-cflags='-arch armv7'",
    
"--extra-ldflags='-arch armv7'",
    
"--extra-cflags='-mfpu=neon -mfloat-abi=softfp -mvectorize-with-neon-quad'",
    
'--enable-neon',
    
'--enable-optimizations',
    
'--disable-debug',
    
'--disable-armv5te',
    
'--disable-armv6',
    
'--disable-armv6t2',
    
'--enable-small',
    
'--disable-ffmpeg',
    
'--disable-ffplay',
    
'--disable-ffserver',
    
'--disable-ffprobe',
    
'--disable-doc',
    
'--disable-bzlib',
    
'--target-os=darwin',
    
'--enable-cross-compile',
    
#'--enable-nonfree',
    
'--enable-gpl',
    
'--enable-version3',

    And according to Instruments the following functions take about 30% CPU usage each :

    Running Time    Self        Symbol Name
    
37023.9ms   32.3%   13874,8                   ff_h264_decode_mb_cabac
    
34626.2ms   30.2%   9194,7                    loop_filter
    
29430.0ms   25.6%   173,8                     ff_h264_hl_decode_mb

  • Revision 36982 : Certaines valeurs ne passent pas dans presets ... on améliore de ce coté ...

    6 avril 2010, par kent1@… — Log

    Certaines valeurs ne passent pas dans presets ... on améliore de ce coté là
    On affiche les boutons sous les documents même dans le cas d’un retour ajax

  • building ffmpeg with openh264 configure results in h264 decoder DISabled ?

    7 juillet 2018, par hal497

    I’ve got openh264, built from source, installed locally,

    pkg-config --libs --cflags openh264
    
        -I/usr/local/include -L/usr/local/lib64 -lopenh264

    Building ffmpeg from src

    cd ffmpeg-git
    
    git checkout origin/release/4.0
    
    git clean -xfd
    
    git reset --hard
    
    git pull
    
    git log | head
    
        commit b5106c5aa2ddd00f0c0452432ba8e683a9a06b6f
    
        Author: Aman Gupta <aman@tmm1.net>
    
        Date:   Mon Jun 11 00:43:31 2018 -0700
    

    
            avformat/mpegts: parse large PMTs with multiple tables
    

    
            In 9152c1e4955, the mpegts parser was taught how to parse
    
            PMT sections which contained multiple tables. That commit
    
            fixed parsing of PMT packets from some cable providers,
    
            which included a special SCTE table (0xc0) before the

    with a simple config to ENABLE libopenh264 use

    ./configure --enable-ffmpeg \
    
--prefix=/usr/local --libdir=/usr/local/lib64 \
    
--enable-shared --disable-static --enable-rpath \
    
--enable-libopenh264 --disable-libx264
    
make

    checking the build

    ldd ./ffmpeg | egrep "h264|x264"
    
    (empty)

    there are mixed references to libopenh264 and libx264 (despite my config),

    for l in lib*/*so; do echo $l; ldd $l | egrep "264"; done
    
    libavcodec/libavcodec.so
    
            libopenh264.so.4 => /usr/local/lib64/libopenh264.so.4 (0x00007f82dd74d000)
    
    libavdevice/libavdevice.so
    
            libx264.so.152 => /usr/lib64/libx264.so.152 (0x00007f0575c6f000)
    
    libavfilter/libavfilter.so
    
            libx264.so.152 => /usr/lib64/libx264.so.152 (0x00007f85bae41000)
    
    libavformat/libavformat.so
    
            libx264.so.152 => /usr/lib64/libx264.so.152 (0x00007ff105701000)
    
    libavutil/libavutil.so
    
    libswresample/libswresample.so
    
    libswscale/libswscale.so

    and

    ./ffmpeg -decoders | grep h264

    shows h264 as a disabled decoder, (... —enable-libx264 —disable-libopenh264 ...)

    ffmpeg version n4.0.1-5-gb5106c5aa2 Copyright (c) 2000-2018 the FFmpeg developers
    
  built with gcc 8 (SUSE Linux)
    
  configuration: --enable-ffmpeg --prefix=/usr/local --libdir=/usr/local/lib64 --enable-shared --disable-static --enable-optimizations --enable-rpath --disable-doc --enable-nonfree --enable-libopenh264 --disable-libx264
    
  WARNING: library configuration mismatch
    
  avutil      configuration: --prefix=/usr/local --libdir=/usr/local/lib64 --extra-cflags='-grecord-gcc-switches -g -fPIC -I/usr/include/gsm' --disable-static --enable-shared --disable-stripping --enable-optimizations --disable-debug --enable-ffmpeg --disable-ffplay --disable-ffprobe --disable-devices --disable-htmlpages --disable-doc --enable-gpl --enable-nonfree --enable-version3 --enable-libx264 --disable-libopenh264 --enable-libfdk-aac --enable-libmp3lame --enable-runtime-cpudetect --enable-postproc --enable-bzlib --enable-swresample --disable-avresample --enable-ladspa --enable-muxers --enable-demuxers --enable-encoders --disable-encoder= --enable-decoders --disable-decoder= --enable-protocol=http --disable-libpulse --enable-pthreads --enable-pic --enable-zlib --disable-mipsdsp --disable-mipsdspr2 --disable-openssl --enable-gnutls --disable-cuda --enable-vaapi --enable-vdpau --enable-libcdio --enable-libgsm --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-inline-asm --enable-x86asm
    
  avcodec     configuration: --prefix=/usr/local --libdir=/usr/local/lib64 --extra-cflags='-grecord-gcc-switches -g -fPIC -I/usr/include/gsm' --disable-static --enable-shared --disable-stripping --enable-optimizations --disable-debug --enable-ffmpeg --disable-ffplay --disable-ffprobe --disable-devices --disable-htmlpages --disable-doc --enable-gpl --enable-nonfree --enable-version3 --enable-libx264 --disable-libopenh264 --enable-libfdk-aac --enable-libmp3lame --enable-runtime-cpudetect --enable-postproc --enable-bzlib --enable-swresample --disable-avresample --enable-ladspa --enable-muxers --enable-demuxers --enable-encoders --disable-encoder= --enable-decoders --disable-decoder= --enable-protocol=http --disable-libpulse --enable-pthreads --enable-pic --enable-zlib --disable-mipsdsp --disable-mipsdspr2 --disable-openssl --enable-gnutls --disable-cuda --enable-vaapi --enable-vdpau --enable-libcdio --enable-libgsm --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-inline-asm --enable-x86asm
    
  avformat    configuration: --prefix=/usr/local --libdir=/usr/local/lib64 --extra-cflags='-grecord-gcc-switches -g -fPIC -I/usr/include/gsm' --disable-static --enable-shared --disable-stripping --enable-optimizations --disable-debug --enable-ffmpeg --disable-ffplay --disable-ffprobe --disable-devices --disable-htmlpages --disable-doc --enable-gpl --enable-nonfree --enable-version3 --enable-libx264 --disable-libopenh264 --enable-libfdk-aac --enable-libmp3lame --enable-runtime-cpudetect --enable-postproc --enable-bzlib --enable-swresample --disable-avresample --enable-ladspa --enable-muxers --enable-demuxers --enable-encoders --disable-encoder= --enable-decoders --disable-decoder= --enable-protocol=http --disable-libpulse --enable-pthreads --enable-pic --enable-zlib --disable-mipsdsp --disable-mipsdspr2 --disable-openssl --enable-gnutls --disable-cuda --enable-vaapi --enable-vdpau --enable-libcdio --enable-libgsm --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-inline-asm --enable-x86asm
    
  avdevice    configuration: --prefix=/usr/local --libdir=/usr/local/lib64 --extra-cflags='-grecord-gcc-switches -g -fPIC -I/usr/include/gsm' --disable-static --enable-shared --disable-stripping --enable-optimizations --disable-debug --enable-ffmpeg --disable-ffplay --disable-ffprobe --disable-devices --disable-htmlpages --disable-doc --enable-gpl --enable-nonfree --enable-version3 --enable-libx264 --disable-libopenh264 --enable-libfdk-aac --enable-libmp3lame --enable-runtime-cpudetect --enable-postproc --enable-bzlib --enable-swresample --disable-avresample --enable-ladspa --enable-muxers --enable-demuxers --enable-encoders --disable-encoder= --enable-decoders --disable-decoder= --enable-protocol=http --disable-libpulse --enable-pthreads --enable-pic --enable-zlib --disable-mipsdsp --disable-mipsdspr2 --disable-openssl --enable-gnutls --disable-cuda --enable-vaapi --enable-vdpau --enable-libcdio --enable-libgsm --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-inline-asm --enable-x86asm
    
  avfilter    configuration: --prefix=/usr/local --libdir=/usr/local/lib64 --extra-cflags='-grecord-gcc-switches -g -fPIC -I/usr/include/gsm' --disable-static --enable-shared --disable-stripping --enable-optimizations --disable-debug --enable-ffmpeg --disable-ffplay --disable-ffprobe --disable-devices --disable-htmlpages --disable-doc --enable-gpl --enable-nonfree --enable-version3 --enable-libx264 --disable-libopenh264 --enable-libfdk-aac --enable-libmp3lame --enable-runtime-cpudetect --enable-postproc --enable-bzlib --enable-swresample --disable-avresample --enable-ladspa --enable-muxers --enable-demuxers --enable-encoders --disable-encoder= --enable-decoders --disable-decoder= --enable-protocol=http --disable-libpulse --enable-pthreads --enable-pic --enable-zlib --disable-mipsdsp --disable-mipsdspr2 --disable-openssl --enable-gnutls --disable-cuda --enable-vaapi --enable-vdpau --enable-libcdio --enable-libgsm --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-inline-asm --enable-x86asm
    
  swscale     configuration: --prefix=/usr/local --libdir=/usr/local/lib64 --extra-cflags='-grecord-gcc-switches -g -fPIC -I/usr/include/gsm' --disable-static --enable-shared --disable-stripping --enable-optimizations --disable-debug --enable-ffmpeg --disable-ffplay --disable-ffprobe --disable-devices --disable-htmlpages --disable-doc --enable-gpl --enable-nonfree --enable-version3 --enable-libx264 --disable-libopenh264 --enable-libfdk-aac --enable-libmp3lame --enable-runtime-cpudetect --enable-postproc --enable-bzlib --enable-swresample --disable-avresample --enable-ladspa --enable-muxers --enable-demuxers --enable-encoders --disable-encoder= --enable-decoders --disable-decoder= --enable-protocol=http --disable-libpulse --enable-pthreads --enable-pic --enable-zlib --disable-mipsdsp --disable-mipsdspr2 --disable-openssl --enable-gnutls --disable-cuda --enable-vaapi --enable-vdpau --enable-libcdio --enable-libgsm --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-inline-asm --enable-x86asm
    
  swresample  configuration: --prefix=/usr/local --libdir=/usr/local/lib64 --extra-cflags='-grecord-gcc-switches -g -fPIC -I/usr/include/gsm' --disable-static --enable-shared --disable-stripping --enable-optimizations --disable-debug --enable-ffmpeg --disable-ffplay --disable-ffprobe --disable-devices --disable-htmlpages --disable-doc --enable-gpl --enable-nonfree --enable-version3 --enable-libx264 --disable-libopenh264 --enable-libfdk-aac --enable-libmp3lame --enable-runtime-cpudetect --enable-postproc --enable-bzlib --enable-swresample --disable-avresample --enable-ladspa --enable-muxers --enable-demuxers --enable-encoders --disable-encoder= --enable-decoders --disable-decoder= --enable-protocol=http --disable-libpulse --enable-pthreads --enable-pic --enable-zlib --disable-mipsdsp --disable-mipsdspr2 --disable-openssl --enable-gnutls --disable-cuda --enable-vaapi --enable-vdpau --enable-libcdio --enable-libgsm --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-inline-asm --enable-x86asm
    
  libavutil      56. 14.100 / 56. 14.100
    
  libavcodec     58. 18.100 / 58. 18.100
    
  libavformat    58. 12.100 / 58. 12.100
    
  libavdevice    58.  3.100 / 58.  3.100
    
  libavfilter     7. 16.100 /  7. 16.100
    
  libswscale      5.  1.100 /  5.  1.100
    
  libswresample   3.  1.100 /  3.  1.100
    
 VFS..D h264                 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
    
 V..... h264_v4l2m2m         V4L2 mem2mem H.264 decoder wrapper (codec h264)

    The question is — why ? And what needs to change so that libopenh264 is consistently & correctly used ?

Navigation