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  • La sauvegarde automatique de canaux SPIP

    1er avril 2010, par

    Dans le cadre de la mise en place d’une plateforme ouverte, il est important pour les hébergeurs de pouvoir disposer de sauvegardes assez régulières pour parer à tout problème éventuel.
    Pour réaliser cette tâche on se base sur deux plugins SPIP : Saveauto qui permet une sauvegarde régulière de la base de donnée sous la forme d’un dump mysql (utilisable dans phpmyadmin) mes_fichiers_2 qui permet de réaliser une archive au format zip des données importantes du site (les documents, les éléments (...)

  • Script d’installation automatique de MediaSPIP

    25 avril 2011, par

    Afin de palier aux difficultés d’installation dues principalement aux dépendances logicielles coté serveur, un script d’installation "tout en un" en bash a été créé afin de faciliter cette étape sur un serveur doté d’une distribution Linux compatible.
    Vous devez bénéficier d’un accès SSH à votre serveur et d’un compte "root" afin de l’utiliser, ce qui permettra d’installer les dépendances. Contactez votre hébergeur si vous ne disposez pas de cela.
    La documentation de l’utilisation du script d’installation (...)

  • Automated installation script of MediaSPIP

    25 avril 2011, par

    To overcome the difficulties mainly due to the installation of server side software dependencies, an "all-in-one" installation script written in bash was created to facilitate this step on a server with a compatible Linux distribution.
    You must have access to your server via SSH and a root account to use it, which will install the dependencies. Contact your provider if you do not have that.
    The documentation of the use of this installation script is available here.
    The code of this (...)

Sur d’autres sites (3044)

  • FFmpeg : undefined references to av_frame_alloc()

    6 août 2014, par dontrythisathome

    I want to get into FFmpeg developing and i started following these samples tutorial here : here

    I started with the first tutorial - tutorial01.c - but i run into this problem ’undefined references to av_frame_alloc()’.

    I’m on Ubuntu 12.04 LTS.

    This is my program :

    /* 
    
 * File:   main.c
    
 * Author: dontrythisathome
    
 *
    
 * Created on 3 giugno 2014, 23.02
    
 */
    

    
#include 
    
#include <libavcodec></libavcodec>avcodec.h>
    
#include <libavformat></libavformat>avformat.h>
    
#include <libavutil></libavutil>frame.h>
    
#include <libswscale></libswscale>swscale.h>
    
/*
    
 *
    
 */
    
void SaveFrame(AVFrame *pFrame, int width, int height, int iFrame)
    
    {
    
        FILE   *pFile;
    
        char  szFilename[32];
    
        int       y;
    

    
        //Apre il file
    
        sprintf(szFilename, "frame%d.ppm", iFrame);
    
        pFile=fopen(szFilename, "wb");
    
        if(pFile==NULL)
    
        {return; }
    

    
        //Scrive l'intestazione del file ( Larghezza x Altezza su video)
    
        fprintf(pFile, "P6\n%d %d\n255\n", width, height);
    

    
        //Scrive i data pixel
    
        for(y=0; ydata[0]+y*pFrame->linesize[0], 1, width*3, pFile);
    
        }
    

    
        //Chiude il file
    
        fclose(pFile);
    
      }
    
/*
    
 * 
    
 */
    
/*Main Function*/
    
int main(int argc, char *argv[])
    
{
    
    AVFormatContext *pFormatCtx;
    
    int                                     i, videoStreamIdx;
    
    AVCodecContext   *pCodecCtx;
    
    AVCodec                      *pCodec;
    
    AVFrame                      *pFrame;
    
    AVFrame                      *pFrameRGB;
    
    AVPacket                     packet;
    
    int                                     frameFinished;
    
    int                                     numBytes;
    
    uint8_t                           *buffer;
    
    static struct SwsContext  *img_convert_ctx;
    

    
    if(argc &lt; 2){
    
        printf("Inserisci un file video\n");
    
        return -1;
    
    }
    

    
    //Registra tutti i formati e i codec
    
    av_register_all();
    

    
    //Apre il file video
    
    if(avformat_open_input(&amp;pFormatCtx, argv[1], NULL, NULL) != 0)
    
    {return -1;} //Impossibile aprire il file
    

    
    //Recupera le informazioni dello stream
    
    if(avformat_find_stream_info(pFormatCtx, NULL) &lt; 0)
    
    {return -1;} // Couldn't find stream information
    

    
    //Versa le informazioni del file sullo standard error
    
    av_dump_format(pFormatCtx, 0, argv[1], 0);
    

    
    //Trova il primo stream video
    
    videoStreamIdx=-1;
    
    for(i=0; inb_streams; i++)
    
    {
    
        if(pFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
    
        { videoStreamIdx=i;
    
            break;}
    
    }
    

    
    if(videoStreamIdx==-1)
    
        return -1; // Impossibile trovare lo stream video
    

    
    // Punta al contenuto del codec per lo stream video
    
    pCodecCtx = pFormatCtx->streams[videoStreamIdx]->codec;
    

    
    // Trova il decoder per lo stream video
    
    pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
    
    if(pCodec==NULL)
    
    {
    
        fprintf(stderr, "Codec Non Supportato!\n");
    
        return -1; //Impossibile trovare il codec
    
    }
    

    
    //Apre il codec
    
    if(avcodec_open2(pCodecCtx, pCodec, NULL) &lt; 0)
    
    {return -1;} //Impossibile aprire il codec
    

    
    //Alloca il frame video
    
    pFrame = av_frame_alloc();
    

    
    //Alloca una struct AVFrame
    
    pFrameRGB = av_frame_alloc();
    
    if(pFrameRGB==NULL)
    
    {return -1;}
    

    
    //Determina la grandezza necessaria per il buffer e lo alloca
    
    numBytes = avpicture_get_size(PIX_FMT_RGB24,
    
                                                                            pCodecCtx->width,
    
                                                                            pCodecCtx->height);
    

    
    buffer = (uint8_t *) av_malloc(numBytes*sizeof(uint8_t));
    

    
    //Assegna le parti appropriate del buffer sulla superficie dell'immagine in pFrameRGB
    
    //Tenere presente che pFrameRGB è un AVFrame, ma AVFrame è una superset di AVPicture
    
    avpicture_fill((AVPicture *)pFrameRGB, buffer, PIX_FMT_RGB24, pCodecCtx->width, pCodecCtx->height);
    

    
    int w = pCodecCtx->width;
    
    int h = pCodecCtx->height;
    
    img_convert_ctx = sws_getContext(w, h, pCodecCtx->pix_fmt,
    
                                                                                       w, h, PIX_FMT_RGB24,
    
                                                                                        SWS_LANCZOS, NULL, NULL, NULL);
    

    
    //Legge i frame e salva i primi 5 frame su disco
    
   i=0;
    
   while((av_read_frame(pFormatCtx, &amp;packet)>=0) &amp;&amp; (i&lt;5))
    
   {
    
       //Questo è il packet dello stream video?
    
       if(packet.stream_index==videoStreamIdx)
    
       {
    
           //Decodifica il frame video
    
           avcodec_decode_video2(pCodecCtx, pFrame, &amp;frameFinished, &amp;packet);
    

    
           //Si è riusiciti ad ottenere il frame video?
    
           if(frameFinished)
    
           {
    
               i++;
    
               sws_scale(img_convert_ctx, (const uint8_t * const *)pFrame->data,
    
                                        pFrame->linesize, 0, pCodecCtx->height,
    
                                        pFrameRGB->data, pFrameRGB->linesize);
    
               SaveFrame(pFrameRGB, pCodecCtx->width, pCodecCtx->height, i);
    
           }
    
       }
    

    
       //Libera il pacchetto che era allocato da av_read_frame
    
       av_free_packet(&amp;packet);
    
   }
    

    
   //Libera l'immagine RGB
    
   av_free(buffer);
    
   av_free(pFrameRGB);
    

    
   //Libera il frame YUV
    
   av_free(pFrame);
    

    
   //Chiude il codec
    
   avcodec_close(pCodecCtx);
    

    
   //Chiude il file video
    
   avformat_close_input(&amp;pFormatCtx);
    

    
   /*FINE PROGRAMMA*/ 
    

    
    return 0;
    
}

    This is the build output :

    "/usr/bin/make" -f nbproject/Makefile-Debug.mk QMAKE= SUBPROJECTS= .build-conf
    
make[1]: ingresso nella directory "/home/dontrythisathome/Programmazione/C-C++/SimpleMediaPlayerForAndroid"
    
"/usr/bin/make"  -f nbproject/Makefile-Debug.mk dist/Debug/GNU-Linux-x86/simplemediaplayerforandroid
    
make[2]: ingresso nella directory "/home/dontrythisathome/Programmazione/C-C++/SimpleMediaPlayerForAndroid"
    
mkdir -p dist/Debug/GNU-Linux-x86
    
gcc     -o dist/Debug/GNU-Linux-x86/simplemediaplayerforandroid build/Debug/GNU-Linux-x86/main.o -L/usr/lib/x86_64-linux-gnu -lavformat -lavcodec -lavutil -lswscale -lz -lbz2
    
build/Debug/GNU-Linux-x86/main.o: In function `main':
    
/home/dontrythisathome/Programmazione/C-C++/SimpleMediaPlayerForAndroid/main.c:105: undefined reference to `av_frame_alloc'
    
/home/dontrythisathome/Programmazione/C-C++/SimpleMediaPlayerForAndroid/main.c:108: undefined reference to `av_frame_alloc'
    
collect2: ld returned 1 exit status
    
make[2]: *** [dist/Debug/GNU-Linux-x86/simplemediaplayerforandroid] Errore 1
    
make[2]: uscita dalla directory "/home/dontrythisathome/Programmazione/C-C++/SimpleMediaPlayerForAndroid"
    
make[1]: *** [.build-conf] Errore 2
    
make[1]: uscita dalla directory "/home/dontrythisathome/Programmazione/C-C++/SimpleMediaPlayerForAndroid"
    
make: *** [.build-impl] Errore 2
    

    
BUILD FAILED (exit value 2, total time: 143ms)

    I also linked the correct library path and headers path because there is no error with that.

    But when i try to build the program from the terminal with these commands :

    gcc -o prog1 /home/dontrythisathome/Programmazione/C-C++/SimpleMediaPlayerForAndroid/main.c -lavformat -lavcodec -lavutil -lswscale -lz -lbz2

    And the output is different :

    /home/dontrythisathome/Programmazione/C-C++/SimpleMediaPlayerForAndroid/main.c:11:29: fatal error: libavutil/frame.h: File o directory non esistente
    
compilation terminated.

    The output says that there is no file or directory existing.
    What is the problem ?

  • huffyuvdec : implement trick for BGR

    3 juin 2014, par Christophe Gisquet
    huffyuvdec : implement trick for BGR

    Before :
    
179436 decicycles in rgb, 32735 runs, 33 skips
    
Stripped object size : 23188
    

    After :
    
154861 decicycles in rgb, 32738 runs, 30 skips
    
Stripped object size : 22736
    

    Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
    • [DH] libavcodec/huffyuvdec.c

  • avconv stops streaming after some time

    4 juin 2014, par Dhrumil Doshi

    I am using raspberry-pi board and a usb camera attached with it. i use avconv tool to capture live video from camera and streaming it on network using rtp protocol.

    My command on server(raspberry-pi board) is as below :

    avconv -f video4linux2 -s 160x120 -i /dev/video0 -vcodec mpeg2video -r 25 -pix_fmt yuv420p -me_method epzs -b 2600k -bt 256k -f rtp rtp ://192.168.1.141:8554

    streaming works successfully using this command. Here IP address 192.168.1.141 is the ip address of my client pc. i can play live streaming on client side using vlc successfully.

    But Issue is after some time encoding and streaming on server stop automatically. And command hangs there.

    Output on server is as below :

    $ avconv -f video4linux2 -s 160x120 -v debug -i /dev/video0 -vcodec mpeg2video -r 25 -pix_fmt yuv420p -me_method epzs -b 2600k -bt 256k -f rtp rtp://192.168.1.141:8554
    
avconv version 0.8.10-6:0.8.10-1+rpi1, Copyright (c) 2000-2013 the Libav developers
    
  built on Mar 22 2014 02:13:15 with gcc 4.6.3
    
  configuration: --arch=arm --enable-pthreads --enable-runtime-cpudetect --extra-version='6:0.8.10-1+rpi1' --libdir=/usr/lib/arm-linux-gnueabihf --prefix=/usr --disable-yasm --enable-bzlib --enable-libdc1394 --enable-libdirac --enable-libfreetype --enable-frei0r --enable-gnutls --enable-libgsm --enable-libmp3lame --enable-librtmp --enable-libopencv --enable-libopenjpeg --enable-libpulse --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-vaapi --enable-vdpau --enable-libvorbis --enable-libvpx --enable-zlib --enable-gpl --enable-postproc --enable-swscale --enable-libcdio --enable-x11grab --enable-libx264 --enable-libxvid --shlibdir=/usr/lib/arm-linux-gnueabihf --enable-shared --disable-static
    
  libavutil    51. 22. 2 / 51. 22. 2
    
  libavcodec   53. 35. 0 / 53. 35. 0
    
  libavformat  53. 21. 1 / 53. 21. 1
    
  libavdevice  53.  2. 0 / 53.  2. 0
    
  libavfilter   2. 15. 0 /  2. 15. 0
    
  libswscale    2.  1. 0 /  2.  1. 0
    
  libpostproc  52.  0. 0 / 52.  0. 0
    
[video4linux2 @ 0x54d7a0] [4]Capabilities: 84000001
    
[video4linux2 @ 0x54d7a0] The V4L2 driver changed the pixel format from 0x32315559 to 0x56595559
    
    Last message repeated 1 times
    
[video4linux2 @ 0x54d7a0] The V4L2 driver changed the pixel format from 0x50323234 to 0x56595559
    
[video4linux2 @ 0x54d7a0] The V4L2 driver set input_id: 0, input: Camera 1
    
[rawvideo @ 0x54f860] err{or,}_recognition separate: 1; 1
    
[rawvideo @ 0x54f860] err{or,}_recognition combined: 1; 1
    
[video4linux2 @ 0x54d7a0] All info found
    
[video4linux2 @ 0x54d7a0] Estimating duration from bitrate, this may be inaccurate
    
Input #0, video4linux2, from '/dev/video0':
    
  Duration: N/A, start: 21891.364784, bitrate: 9216 kb/s
    
    Stream #0.0, 1, 1/1000000: Video: rawvideo, yuyv422, 160x120, 1/30, 9216 kb/s, 30 tbr, 1000k tbn, 30 tbc
    
[buffer @ 0x54f220] w:160 h:120 pixfmt:yuyv422
    
[avsink @ 0x54d740] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
    
[scale @ 0x54f7e0] w:160 h:120 fmt:yuyv422 -> w:160 h:120 fmt:yuv420p flags:0x4
    
[mpeg2video @ 0x54ea60] err{or,}_recognition separate: 1; 1
    
[mpeg2video @ 0x54ea60] err{or,}_recognition combined: 1; 1
    
[mpeg2video @ 0x54ea60] detected 1 logical cores
    
[mpeg2video @ 0x54ea60] Unsupported bit depth: 0
    
[rawvideo @ 0x54f860] err{or,}_recognition separate: 1; 1
    
[rawvideo @ 0x54f860] err{or,}_recognition combined: 1; 1
    
Output #0, rtp, to 'rtp://192.168.1.141:8554':
    
  Metadata:
    
    encoder         : Lavf53.21.1
    
    Stream #0.0, 0, 1/90000: Video: mpeg2video, yuv420p, 160x120, 1/25, q=2-31, 2600 kb/s, 90k tbn, 25 tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (rawvideo -> mpeg2video)
    
SDP:
    
v=0
    
o=- 0 0 IN IP4 127.0.0.1
    
s=No Name
    
c=IN IP4 192.168.1.141
    
t=0 0
    
a=tool:libavformat 53.21.1
    
m=video 8554 RTP/AVP 32
    
b=AS:2600
    

    
Press ctrl-c to stop encoding
    
*** drop!
    
    Last message repeated 1 times
    
*** 1 dup!
    
*** 16 dup! fps= 25 q=2.0 size=    1027kB time=5.24 bitrate=1605.2kbits/s dup=1 drop=2    
    
*** drop!
    
    Last message repeated 11 times
    
*** drop!49 fps= 26 q=2.0 size=    1059kB time=5.92 bitrate=1464.9kbits/s dup=17 drop=14    
    
    Last message repeated 2 times
    
*** drop!76 fps= 25 q=2.0 size=    2022kB time=11.00 bitrate=1505.7kbits/s dup=17 drop=17    
    
*** drop!48 fps= 25 q=2.0 size=    4086kB time=21.88 bitrate=1529.8kbits/s dup=17 drop=18    
    
*** 1 dup!
    
*** 1 dup!0 fps= 25 q=2.0 size=    4171kB time=22.36 bitrate=1528.2kbits/s dup=18 drop=19    
    
*** 1 dup!1 fps= 25 q=2.0 size=    4859kB time=26.00 bitrate=1530.8kbits/s dup=19 drop=19    
    
*** 1 dup!0 fps= 25 q=2.0 size=    5152kB time=27.56 bitrate=1531.5kbits/s dup=20 drop=19    
    
*** 1 dup!3 fps= 25 q=2.0 size=    5250kB time=28.08 bitrate=1531.7kbits/s dup=21 drop=19    
    
*** drop!64 fps= 25 q=2.0 size=    7215kB time=38.52 bitrate=1534.5kbits/s dup=22 drop=19    
    
*** 1 dup!6 fps= 25 q=2.0 size=    7306kB time=39.00 bitrate=1534.6kbits/s dup=22 drop=20    
    
*** drop!07 fps= 25 q=2.0 size=    8288kB time=44.24 bitrate=1534.7kbits/s dup=23 drop=20    
    
*** 1 dup!0 fps= 25 q=2.0 size=   10054kB time=53.56 bitrate=1537.8kbits/s dup=23 drop=21    
    
*** 1 dup!9 fps= 25 q=2.0 size=   10342kB time=55.12 bitrate=1537.1kbits/s dup=24 drop=21    
    
    Last message repeated 1 times
    
*** drop!93 fps= 25 q=1.6 size=   10445kB time=55.68 bitrate=1536.7kbits/s dup=26 drop=21    
    
*** 1 dup!
    
*** 7036829 dup! 25 q=2.0 size=   10630kB time=56.68 bitrate=1536.4kbits/s dup=27 drop=22

    Any ideas ?

    Thanks in advance.

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