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  • Multilang : améliorer l’interface pour les blocs multilingues

    18 février 2011, par

    Multilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
    Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela.

  • 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 (...)

Sur d’autres sites (10412)

  • Why does ffmpeg cmake external project is not working

    24 mars 2019, par bottega

    I’m trying to compile ffmpeg with h264 support as an external cmake project. But after compile it, I’m getting libavcodec reference errors.

    The compile problem is occurring on Ubuntu 18.04 machine. I have installed all dependencies for ffmpeg and also libx264-dev.

    Cmake external project

    set( proj ffmpeg )
    
set( SHARED_FFMPEG )
    

    

    
set(BASIC
    
        --extra-ldflags=-L/usr/local/lib
    
        --extra-cflags=-I/usr/local/include
    
        --enable-gpl
    
        --enable-libx264)
    

    

    
option( FFMPEG_GPL "Use a GPL version of FFMPEG" OFF )
    

    
set(FFMPEG_INSTALL_DIR  ${CMAKE_BINARY_DIR}/INSTALL )
    

    
ExternalProject_Add(${proj}
    
        # Set up dirs
    
        SOURCE_DIR ${CMAKE_BINARY_DIR}/${proj}
    
        INSTALL_DIR ${FFMPEG_INSTALL_DIR}
    
        # get the project
    
        GIT_REPOSITORY "https://github.com/FFmpeg/FFmpeg.git"
    
        GIT_TAG "n3.2.13"
    

    
        # Build the project
    
        BUILD_IN_SOURCE 1
    

    
        # Configure step
    
        # DO STH FOR THE ARCHITECTURE...
    
        CONFIGURE_COMMAND /configure --prefix=${FFMPEG_INSTALL_DIR} ${SHARED_FFMPEG} ${FFMPEG_GPL_FLAG} ${BASIC}
    

    
        #  BUILD_COMMAND ${CMAKE_MAKE_PROGRAM} -j${NProcessors}
    
        )
    

    
# define the library suffix
    
if( SUPER_SHARED_LIBS )
    
    if( APPLE )
    
        set(LIBRARY_SUFFIX .dylib)
    
    else( APPLE )
    
        set(LIBRARY_SUFFIX .so)
    
    endif( APPLE )
    
else( SUPER_SHARED_LIBS )
    
    set(LIBRARY_SUFFIX .a)
    
endif( SUPER_SHARED_LIBS )
    

    
# ADD DIRECTORIES FOR DEPENDENCIES IN Main/CMakeLists.txt
    
set( FFMPEG_LIBRARYS libavcodec.a
    
        libavformat.a
    
        libavutil.a
    
        libswscale.a
    
        )
    

    
include_directories(${FFMPEG_INSTALL_DIR}/include)
    

    
set(FFMPEG_LIBRARY_DIRS ${FFMPEG_INSTALL_DIR}/lib/)
    
link_directories(${FFMPEG_LIBRARY_DIRS})

    C++ Where I used the library

    extern "C" {
    
#include 
    
#include 
    
#include 
    

    
#include "libavcodec/avcodec.h"
    
#include "libavformat/avformat.h"
    
#include "libavutil/mathematics.h"
    
#include "libswscale/swscale.h"
    

    
#define INBUF_SIZE 4096
    
#define AUDIO_INBUF_SIZE 20480
    
#define AUDIO_REFILL_THRESH 4096
    
}
    

    
...
    

    
 fReceiveBuffer = new u_int8_t[DUMMY_SINK_RECEIVE_BUFFER_SIZE];
    
    fReceiveBufferAV = new u_int8_t[DUMMY_SINK_RECEIVE_BUFFER_SIZE+4];
    
    fReceiveBufferAV[0] = 0;
    
    fReceiveBufferAV[1] = 0;
    
    fReceiveBufferAV[2] = 0;
    
    fReceiveBufferAV[3] = 1;
    

    

    
    av_init_packet(&avpkt);
    
    avpkt.flags |= AV_PKT_FLAG_KEY;
    
    avpkt.pts = avpkt.dts = 0;
    

    
    av_init_packet(&avpkt);
    
    avpkt.flags |= AV_PKT_FLAG_KEY;
    
    avpkt.pts = avpkt.dts = 0;
    

    
    /* set end of buffer to 0 (this ensures that no overreading happens for damaged mpeg streams) */
    
    memset(inbuf + INBUF_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);
    

    
    //codec = avcodec_find_decoder(CODEC_ID_MPEG1VIDEO);
    
    codec = avcodec_find_decoder(AV_CODEC_ID_H264);
    

    
...

    Error :

    [100%] Linking CXX executable ../../bin/awesom-o
    
/home/tiburcio/CLionProjects/awesom-o/cmake-build-debug/INSTALL/lib/libavcodec.a(libx264.o): In function `X264_frame':
    
/home/tiburcio/CLionProjects/awesom-o/cmake-build-debug/ffmpeg/libavcodec/libx264.c:280: undefined reference to `x264_picture_init'
    
/home/tiburcio/CLionProjects/awesom-o/cmake-build-debug/INSTALL/lib/libavcodec.a(libx264.o): In function `reconfig_encoder':
    
/home/tiburcio/CLionProjects/awesom-o/cmake-build-debug/ffmpeg/libavcodec/libx264.c:266: undefined reference to `x264_encoder_reconfig'
    
/home/tiburcio/CLionProjects/awesom-o/cmake-build-debug/INSTALL/lib/libavcodec.a(libx264.o): In function `X264_frame':
    
/home/tiburcio/CLionProjects/awesom-o/cmake-build-debug/ffmpeg/libavcodec/libx264.c:340: undefined reference to `x264_encoder_encode'

  • How to detect audio sampling rate with avprobe / ffprobe ?

    23 novembre 2022, par Devy

    I am using libav 9.6, installed via Homebrew.

    



    $ avprobe -version
avprobe version 9.6, Copyright (c) 2007-2013 the Libav developers
  built on Jun  8 2013 02:44:19 with Apple LLVM version 4.2 (clang-425.0.24) (based on LLVM 3.2svn)
avprobe 9.6
libavutil     52.  3. 0 / 52.  3. 0
libavcodec    54. 35. 0 / 54. 35. 0
libavformat   54. 20. 3 / 54. 20. 3
libavdevice   53.  2. 0 / 53.  2. 0
libavfilter    3.  3. 0 /  3.  3. 0
libavresample  1.  0. 1 /  1.  0. 1
libswscale     2.  1. 1 /  2.  1. 1


    



    Even though the sampling rate is displayed in the stdout in the command line output, the -show_format option doesn't surface the sampling rate information for the audio file at all.

    



    Here is the BASH terminal output :

    



    $ avprobe  -v verbose -show_format -of json  sample.gsm
avprobe version 9.6, Copyright (c) 2007-2013 the Libav developers
  built on Jun  8 2013 02:44:19 with Apple LLVM version 4.2 (clang-425.0.24)
(based on LLVM 3.2svn)
  configuration: --prefix=/usr/local/Cellar/libav/9.6 --enable-shared
--enable-pthreads --enable-gpl --enable-version3 --enable-nonfree
--enable-hardcoded-tables --enable-avresample --enable-vda --enable-gnutls
--enable-runtime-cpudetect --disable-indev=jack --cc=cc --host-cflags=
--host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame
--enable-libxvid --enable-avplay
  libavutil     52.  3. 0 / 52.  3. 0
  libavcodec    54. 35. 0 / 54. 35. 0
  libavformat   54. 20. 3 / 54. 20. 3
  libavdevice   53.  2. 0 / 53.  2. 0
  libavfilter    3.  3. 0 /  3.  3. 0
  libavresample  1.  0. 1 /  1.  0. 1
  libswscale     2.  1. 1 /  2.  1. 1
[gsm @ 0x7f8012806600] Estimating duration from bitrate, this may be inaccurate
Input #0, gsm, from 'sample.gsm':
  Duration: 00:03:52.32, start: 0.000000, bitrate: 13 kb/s
    Stream #0.0: Audio: gsm, 8000 Hz, mono, s16, 13 kb/s
{  "format" : {
    "filename" : "sample.gsm",
    "nb_streams" : 1,
    "format_name" : "gsm",
    "format_long_name" : "raw GSM",
    "start_time" : "0.000000",
    "duration" : "232.320000",
    "size" : "383328.000000",
    "bit_rate" : "13200.000000"
  }}


    



    And the python code example :

    



    >>> filename = 'sample.gsm'
>>> result = subprocess.check_output(['avprobe', '-show_format', '-of',
'json', filename])
avprobe version 9.6, Copyright (c) 2007-2013 the Libav developers
  built on Jun  8 2013 02:44:19 with Apple LLVM version 4.2
(clang-425.0.24) (based on LLVM 3.2svn)
[gsm @ 0x7fe0b1806600] Estimating duration from bitrate, this may be
inaccurate
Input #0, gsm, from 'sample.gsm':
  Duration: 00:03:52.32, start: 0.000000, bitrate: 13 kb/s
    Stream #0.0: Audio: gsm, 8000 Hz, mono, s16, 13 kb/s
>>> print result
{  "format" : {
    "filename" : "sample.gsm",
    "nb_streams" : 1,
    "format_name" : "gsm",
    "format_long_name" : "raw GSM",
    "start_time" : "0.000000",
    "duration" : "232.320000",
    "size" : "383328.000000",
    "bit_rate" : "13200.000000"
}}


    



    So I am aware that sampling rate could be a stream specific display to be shown in -show_format option results. But there isn't any other options to detect the sampling rate on a specific audio stream even though it's possible to set it with -ar when re-encoding it.

    



    I filed a ticket to libav but I am just curious if there is any other way to extract sampling rate from libav probing utils. I appreciate the answer beforehand.

    



    PS : it would be the same question for the upstream project of ffmpeg (ffprobe) in this case.

    


  • How to detect audio sampling rate with avprobe / ffprobe ?

    8 août 2013, par Devy

    I am using libav 9.6, installed via Homebrew.

    $ avprobe -version
    
avprobe version 9.6, Copyright (c) 2007-2013 the Libav developers
    
  built on Jun  8 2013 02:44:19 with Apple LLVM version 4.2 (clang-425.0.24) (based on LLVM 3.2svn)
    
avprobe 9.6
    
libavutil     52.  3. 0 / 52.  3. 0
    
libavcodec    54. 35. 0 / 54. 35. 0
    
libavformat   54. 20. 3 / 54. 20. 3
    
libavdevice   53.  2. 0 / 53.  2. 0
    
libavfilter    3.  3. 0 /  3.  3. 0
    
libavresample  1.  0. 1 /  1.  0. 1
    
libswscale     2.  1. 1 /  2.  1. 1

    Even though the sampling rate is displayed in the stdout in the command line output, the -show_format option doesn't surface the sampling rate information for the audio file at all.

    Here is the BASH terminal output :

    $ avprobe  -v verbose -show_format -of json  sample.gsm
    
avprobe version 9.6, Copyright (c) 2007-2013 the Libav developers
    
  built on Jun  8 2013 02:44:19 with Apple LLVM version 4.2 (clang-425.0.24)
    
(based on LLVM 3.2svn)
    
  configuration: --prefix=/usr/local/Cellar/libav/9.6 --enable-shared
    
--enable-pthreads --enable-gpl --enable-version3 --enable-nonfree
    
--enable-hardcoded-tables --enable-avresample --enable-vda --enable-gnutls
    
--enable-runtime-cpudetect --disable-indev=jack --cc=cc --host-cflags=
    
--host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame
    
--enable-libxvid --enable-avplay
    
  libavutil     52.  3. 0 / 52.  3. 0
    
  libavcodec    54. 35. 0 / 54. 35. 0
    
  libavformat   54. 20. 3 / 54. 20. 3
    
  libavdevice   53.  2. 0 / 53.  2. 0
    
  libavfilter    3.  3. 0 /  3.  3. 0
    
  libavresample  1.  0. 1 /  1.  0. 1
    
  libswscale     2.  1. 1 /  2.  1. 1
    
[gsm @ 0x7f8012806600] Estimating duration from bitrate, this may be inaccurate
    
Input #0, gsm, from 'sample.gsm':
    
  Duration: 00:03:52.32, start: 0.000000, bitrate: 13 kb/s
    
    Stream #0.0: Audio: gsm, 8000 Hz, mono, s16, 13 kb/s
    
{  "format" : {
    
    "filename" : "sample.gsm",
    
    "nb_streams" : 1,
    
    "format_name" : "gsm",
    
    "format_long_name" : "raw GSM",
    
    "start_time" : "0.000000",
    
    "duration" : "232.320000",
    
    "size" : "383328.000000",
    
    "bit_rate" : "13200.000000"
    
  }}

    And the python code example :

    >>> filename = 'sample.gsm'
    
>>> result = subprocess.check_output(['avprobe', '-show_format', '-of',
    
'json', filename])
    
avprobe version 9.6, Copyright (c) 2007-2013 the Libav developers
    
  built on Jun  8 2013 02:44:19 with Apple LLVM version 4.2
    
(clang-425.0.24) (based on LLVM 3.2svn)
    
[gsm @ 0x7fe0b1806600] Estimating duration from bitrate, this may be
    
inaccurate
    
Input #0, gsm, from 'sample.gsm':
    
  Duration: 00:03:52.32, start: 0.000000, bitrate: 13 kb/s
    
    Stream #0.0: Audio: gsm, 8000 Hz, mono, s16, 13 kb/s
    
>>> print result
    
{  "format" : {
    
    "filename" : "sample.gsm",
    
    "nb_streams" : 1,
    
    "format_name" : "gsm",
    
    "format_long_name" : "raw GSM",
    
    "start_time" : "0.000000",
    
    "duration" : "232.320000",
    
    "size" : "383328.000000",
    
    "bit_rate" : "13200.000000"
    
}}

    So I am aware that sampling rate could be a stream specific display to be shown in -show_format option results. But there isn't any other options to detect the sampling rate on a specific audio stream even though it's possible to set it with -ar when re-encoding it.

    I filed a ticket to libav but I am just curious if there is any other way to extract sampling rate from libav probing utils. I appreciate the answer beforehand.

    PS : it would be the same question for the upstream project of ffmpeg (ffprobe) in this case.

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