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Richard Stallman et le logiciel libre
19 octobre 2011, par
Mis à jour : Mai 2013
Langue : français
Type : Texte
Autres articles (81)
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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 (...) -
Amélioration de la version de base
13 septembre 2013Jolie sélection multiple
Le plugin Chosen permet d’améliorer l’ergonomie des champs de sélection multiple. Voir les deux images suivantes pour comparer.
Il suffit pour cela d’activer le plugin Chosen (Configuration générale du site > Gestion des plugins), puis de configurer le plugin (Les squelettes > Chosen) en activant l’utilisation de Chosen dans le site public et en spécifiant les éléments de formulaires à améliorer, par exemple select[multiple] pour les listes à sélection multiple (...) -
Multilang : améliorer l’interface pour les blocs multilingues
18 février 2011, parMultilang 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.
Sur d’autres sites (10235)
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Streaming Webcam using VLC +FFmpeg over lan - Error : cannot pre fill buffer
23 juin 2016, par user1804015I’ve been trying to stream my webcam over lan using VLC and FFmpeg
but I end up with the error "Main stream error : cannot pre fill buffer"
Here is the code I’ve tried
ffmpeg -f x11grab -s 1680x1050 -r 30 -i :0.0+0,0 -vf "movie=/dev/video0:f=video4linux2, scale=180:-1, setpts=PTS-STARTPTS [movie]; [in] setpts=PTS-STARTPTS, [movie] overlay=main_w-overlay_w-10:main_h-overlay_h-10 [out]" -f alsa -ac 2 -i pulse -vcodec libx264 -preset ultrafast -s 1280x768 -acodec libfaac -threads 0 -f mpegts - | vlc -I dummy - --sout '#std{access=http,mux=ts,dst=thalha:3030}'And this is the output
VLC media player 1.1.9 The Luggage (revision exported)
FFmpeg version 0.6.6-4:0.6.6-0ubuntu0.11.04.1, Copyright (c) 2000-2010 the Libav developers
built on Jun 12 2012 16:28:21 with gcc 4.5.2
configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --enable-shared --disable-static
WARNING: library configuration mismatch
libavutil configuration: --extra-version=4:0.6.6-1ubuntu1+medibuntu1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libdirac --enable-libgsm --enable-libopenjpeg --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-version3 --enable-vaapi --enable-libopenjpeg --enable-libfaac --enable-nonfree --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libfaad --enable-libdirac --enable-libfaad --enable-libmp3lame --enable-librtmp --enable-libx264 --enable-libxvid --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
libavcodec configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
libavformat configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
libavdevice configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
libavfilter configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
libswscale configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
libpostproc configuration: --extra-version=4:0.6.6-0ubuntu0.11.04.1 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --enable-libvpx --disable-stripping --enable-runtime-cpudetect --enable-vaapi --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --shlibdir=/usr/lib/i686/cmov --cpu=i686 --enable-shared --disable-static --disable-ffmpeg --disable-ffplay
libavutil 50.15. 1 / 50.15. 1
libavcodec 52.72. 2 / 52.72. 2
libavformat 52.64. 2 / 52.64. 2
libavdevice 52. 2. 0 / 52. 2. 0
libavfilter 1.19. 0 / 1.19. 0
libswscale 0.11. 0 / 0.11. 0
libpostproc 51. 2. 0 / 51. 2. 0
[x11grab @ 0x98e8420]device: :0.0+0,0 -> display: :0.0 x: 0 y: 0 width: 1680 height: 1050
[x11grab @ 0x98e8420]shared memory extension found
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 140 (MIT-SHM)
Minor opcode of failed request: 4 (X_ShmGetImage)
Serial number of failed request: 11
Current serial number in output stream: 11
Warning: call to srand(1352225865)
Warning: call to rand()
Blocked: call to unsetenv("DBUS_ACTIVATION_ADDRESS")
Blocked: call to unsetenv("DBUS_ACTIVATION_BUS_TYPE")
[0x9782aec] dummy interface: using the dummy interface module...
[0x987258c] main access out: creating httpd
[0x98d0764] main stream error: cannot pre fill bufferPlease help me to achieve this. Thanks in advance.
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audio filter with ffmpeg code libraries not working
11 novembre 2012, par Ron WoodsI am trying out the filtering_audio.c example provided with the ffmpeg libraries for Windows to extract the audio from a MP4 file, resample to 8 KHz and convert from stereo to mono. The example pipes the audio output via stdout to ffplay. I am using Visual Studio 2010 and the example successfully builds and runs but the result is clearly not the desired result.
At the end of init_filters I added a call to avfilter_graph_dump() and it all looks correct and also the pipe to ffplay as in this trace :abuffer filter args: time_base=1/24000:sample_rate=24000:sample_fmt=s16:channel_layout=0x4
Output: srate:8000Hz fmt:s16 chlayout:mono
+-----------+
| in |default--[24000Hz s16:mono]--Parsed_aconvert_0:default
| (abuffer) |
+-----------+
+-----------------+
Parsed_aresample_1:default--[8000Hz s16:mono]--default| out |
| (ffabuffersink) |
+-----------------+
+-------------------+
in:default--[24000Hz s16:mono]--default| Parsed_aconvert_0 |default--[24000Hz s16:mono]-Parsed_aresample_1:default
| (aconvert) |
+-------------------+
+--------------------+
Parsed_aconvert_0:default--[24000Hz s16:mono]--default| Parsed_aresample_1 |default--[8000Hz s16:mono]--out:default
| (aresample) |
+--------------------+
[s16le @ 003edda0] Invalid sample rate 0 specified using default of 44100
[s16le @ 003edda0] Estimating duration from bitrate, this may be inaccurate
Input #0, s16le, from 'pipe:':
Duration: N/A, start: 0.000000, bitrate: 128 kb/s
Stream #0:0: Audio: pcm_s16le, 8000 Hz, 1 channels, s16, 128 kb/sIf you have made this example run properly on Windows in VS 2010, would you please provide any tips or changes you made for it to work ?
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LNK 2019 unresolved symbol - FFmpeg
7 juin 2013, par Cristina1986I'm trying to use FFmpeg to open and read a video .avi
I work on win7 x64 with Visual Studio 2010For now my code is very simple :
#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
#include "SDL.h"
#include "SDL_mixer.h"
int main (int argc, char *argv[]) {
AVFormatContext *pFile_video;
int s, videoStream;
AVCodecContext *pCodecCtx;
AVCodec *pCodec;
AVFrame *pFrame;
AVFrame *pFrameRGB;
AVPacket packet;
int frameFinished;
int numBytes;
uint8_t *buffer;
av_register_all();
if((avformat_open_input(&pFile_video, "AR.avi", NULL,NULL)!=0)) cout <<"cannot open video file"</if(av_find_stream_info(pFile_video) <0) cout <<"cannot retrive stream information"<nb_streams;s++){
if((pFile_video->streams[s]->codec->codec_type) == AVMEDIA_TYPE_VIDEO) videoStream =s;
}
if(videoStream ==-1) cout <<"cannot open video stream"<code>I linked following .lib files :
avcodec.lib
avdevice.lib
avfilter.lib
avformat.lib
avutil.lib
postproc.lib
swresample.lib
swscale.libbut I get these errors :
>MSVCRTD.lib(cinitexe.obj) : warning LNK4098: la libreria predefinita 'msvcrt.lib' è in conflitto con l'utilizzo di altre librerie; utilizzare /NODEFAULTLIB:libreria
1>main_video_ffmpeg.obj : error LNK2019: riferimento al simbolo esterno "int __cdecl avformat_open_input(struct AVFormatContext * *,char const *,struct AVInputFormat *,struct AVDictionary * *)" (?avformat_open_input@@YAHPAPAUAVFormatContext@@PBDPAUAVInputFormat@@PAPAUAVDictionary@@@Z) non risolto nella funzione _SDL_main
1>main_video_ffmpeg.obj : error LNK2019: riferimento al simbolo esterno "void __cdecl av_register_all(void)" (?av_register_all@@YAXXZ) non risolto nella funzione _SDL_main
1>C:\Users\Cristina\Desktop\OpenCV\Progetti\MIEI_PROGETTI_Vs\video_ffmpeg\Debug\video_ffmpeg.exe : fatal error LNK1120: 2 esterni non risoltiI think it is a linker error.. but I haven't other .lib file for FFmpeg library.
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