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  • Librairies et logiciels spécifiques aux médias

    10 décembre 2010, par

    Pour un fonctionnement correct et optimal, plusieurs choses sont à prendre en considération.
    Il est important, après avoir installé apache2, mysql et php5, d’installer d’autres logiciels nécessaires dont les installations sont décrites dans les liens afférants. Un ensemble de librairies multimedias (x264, libtheora, libvpx) utilisées pour l’encodage et le décodage des vidéos et sons afin de supporter le plus grand nombre de fichiers possibles. Cf. : ce tutoriel ; FFMpeg avec le maximum de décodeurs et (...)

  • Organiser par catégorie

    17 mai 2013, par

    Dans MédiaSPIP, une rubrique a 2 noms : catégorie et rubrique.
    Les différents documents stockés dans MédiaSPIP peuvent être rangés dans différentes catégories. On peut créer une catégorie en cliquant sur "publier une catégorie" dans le menu publier en haut à droite ( après authentification ). Une catégorie peut être rangée dans une autre catégorie aussi ce qui fait qu’on peut construire une arborescence de catégories.
    Lors de la publication prochaine d’un document, la nouvelle catégorie créée sera proposée (...)

  • Récupération d’informations sur le site maître à l’installation d’une instance

    26 novembre 2010, par

    Utilité
    Sur le site principal, une instance de mutualisation est définie par plusieurs choses : Les données dans la table spip_mutus ; Son logo ; Son auteur principal (id_admin dans la table spip_mutus correspondant à un id_auteur de la table spip_auteurs)qui sera le seul à pouvoir créer définitivement l’instance de mutualisation ;
    Il peut donc être tout à fait judicieux de vouloir récupérer certaines de ces informations afin de compléter l’installation d’une instance pour, par exemple : récupérer le (...)

Sur d’autres sites (5668)

  • Issues when decoding video via ffmpeg with dxva2

    5 janvier 2016, par CD83

    I have successfully implemented a video player using ffmpeg. I am now trying to use hardware decoding but I’m facing a couple issues.
    I found a post that I followed as a starting point here : http://comments.gmane.org/gmane.comp.video.ffmpeg.libav.user/13523

    I have updated the code that setup the necessary stuff for the decoder. The updated code is available here : https://drive.google.com/file/d/0B5ufHdoDzA4ieVk5UVpxcDNzRHc/view?usp=sharing

    And this is how I’m using it to initialize the decoder :

    // Prepare the decoding context
    
AVCodec *codec = nullptr;
    
_codecContext = _avFormatContext->streams[_streamIndex]->codec;
    
if ((codec = avcodec_find_decoder(_codecContext->codec_id)) == 0)
    
{
    
    std::cout << "Unsupported video codec!" << std::endl;
    
    return false;
    
}
    

    
_codecContext->thread_count = 1;  // Multithreading is apparently not compatible with hardware decoding
    
InputStream *ist = new InputStream();
    
ist->hwaccel_id = HWACCEL_AUTO;
    
ist->hwaccel_device = "dxva2";
    
ist->dec = codec;
    
ist->dec_ctx = _codecContext;
    
_codecContext->coded_width = _width;
    
_codecContext->coded_height = _height;
    

    
_codecContext->opaque = ist;
    
dxva2_init(_codecContext);
    

    
_codecContext->get_buffer2 = ist->hwaccel_get_buffer;
    
_codecContext->get_format = GetHwFormat;
    
_codecContext->thread_safe_callbacks = 1;
    

    
if (avcodec_open2(_codecContext, codec, nullptr) < 0)
    
{
    
    std::cout << "Video codec open error" << std::endl;
    
    return false;
    
}

    And here is the definition of GetHwFormat referenced above :

    AVPixelFormat GetHwFormat(AVCodecContext *s, const AVPixelFormat *pix_fmts)
    
{
    
    InputStream* ist = (InputStream*)s->opaque;
    
    ist->active_hwaccel_id = HWACCEL_DXVA2;
    
    ist->hwaccel_pix_fmt = AV_PIX_FMT_DXVA2_VLD;
    
    return ist->hwaccel_pix_fmt;
    
}

    When I open an mp4 (encoded in h264) video that is HD resolution or less, everything seems to be working fine. However, as soon as I try higher resolution videos like 3840x2160, I get the following errors repeatedly :

    Failed to execute: 0x80070057
    
Hardware accelerator failed to decode picture

    I also start getting the following errors after a few seconds :

    co located POCs unavailable

    And the video is not displayed properly : I get a lot of artifacts all over the video and it is lagging. I checked the first error in the ffmpeg source code. It seems that IDirectXVideoDecoder_Execute fails because of an invalid parameter. Since this is happening withing ffmpeg, there must be something that I’m missing but I can’t figure out what. The only relevant post that I found with this error was because of multithreading but I set the thread_count to 1 before opening the codec.

    This issue is happening on my main computer which has the following specs :

    • i7-4790 CPU @ 3.6GHz
    • RAM 16 GB
    • Intel HD Graphics 4600
    • Windows 8.1

    The same issue is not happening on my second computer which has the following specs :

    • i7 4510U @ 2GHz
    • RAM 8 GB
    • NVIDIA GeForce GTX 750Ti
    • Windows 10

    If I use DXVAChecker on my main computer, it says that my graphics card supports DXVA2 for H264_VLD_*, and I can see that the calls to the Microsoft API are being made (DXVA2_DecodeDeviceCreated, DXVA2_DecodeDeviceBeginFrame, DXVA2_DecodeDeviceGetBuffer, DXVA2_DecodeDeviceExecute, DXVA2_DecodeDeviceEndFrame) while my video is playing.

    I also don’t see any increase of GPU usage (on either computer) between the version with hardware decoding and the version without ; however, I do see a decrease in CPU usage (not as much as I was expecting though). This is also very strange.

    Note that I tried both the Windows release available on the FFmpeg website, and a version that I compiled with —enable-dxva2. I have searched a lot already but I was unable to find what I’m doing wrong.

    Hopefully, someone can help me, or maybe point me to a better example ?

  • bigbluebutton ...

    7 mars 2015, par signo

    Hello i have a BigBlueButton (0.9.0-beta (622)) installation on Debian Wheezy (7.8) all is ok except archiving recordings...

    in the log (/var/log/bigbluebutton/archive-488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.log) i have always same message :

    I, [2015-03-06T11:48:19.320704 #4550]  INFO -- : Archiving events for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.
    
W, [2015-03-06T11:48:19.851280 #4550]  WARN -- : Failed to archive events for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/events.xml (complete error below...)

    but all directory are writable by right user (tomcat7).

    More Info :

    bbb packages installed

    ii  bbb-apps                              0.9.0-1ubuntu88               amd64        BigBlueButton applications for Red5
    
ii  bbb-apps-deskshare                    0.9.0-1ubuntu25               amd64        BigBlueButton deskshare module for Red5
    
ii  bbb-apps-sip                          0.9.0-1ubuntu19               amd64        BigBlueButton SIP module for Red5
    
ii  bbb-apps-video                        0.9.0-1ubuntu18               amd64        BigBlueButton video module for Red5
    
ii  bbb-client                            0.9.0-1ubuntu235              all          BigBlueButton Flash client
    
ii  bbb-config                            0.9.0-1ubuntu42               all          BigBlueButton configuration
    
rc  bbb-demo                              0.9.0-1ubuntu8                amd64        BigBlueButton API demos
    
ii  bbb-freeswitch                        0.9.0-1ubuntu38               amd64        BigBlueButton build of FreeSWITCH 1.5.x
    
ii  bbb-mkclean                           0.8.7-1                       amd64        tool to clean and optimize Matroska and WebM files
    
ii  bbb-office                            0.9.0-1ubuntu6                amd64        BigBlueButton wrapper for LibreOffice
    
ii  bbb-playback-presentation             0.9.0-1ubuntu11               amd64        BigBluebutton playback of presentation
    
ii  bbb-record-core                       0.9.0-1ubuntu37               amd64        BigBlueButton record and playback
    
ii  bbb-red5                              0.9.0-1ubuntu25               amd64        The Red5 server for bbb
    
ii  bbb-swftools                          0.9.2-1ubuntu14               amd64        The swftools files for bbb
    
ii  bbb-web                               0.9.0-1ubuntu54               all          BigBlueButton API
    
ii  bigbluebutton                         0.9.0-1ubuntu2                amd64        Open source web conferencing platform (bbb)

    bbb-conf —check

    BigBlueButton Server 0.9.0-beta (622)
    
                    Kernel version: 3.16.0-4-amd64(64-bit)
    
                            Memory: 12044 MB
    

    
/var/www/bigbluebutton/client/conf/config.xml (bbb-client)
    
        Port test (tunnel): 2xx.xxx.xxx.xx
    
                              Red5: 2xx.xxx.xxx.xx
    
              useWebrtcIfAvailable: true
    

    
/opt/freeswitch/conf/sip_profiles/external.xml (FreeSWITCH)
    
                    websocket port: 5066
    
                    WebRTC enabled: true
    

    
/etc/nginx/sites-available/bigbluebutton (nginx)
    
                       server name: 2xx.xxx.xxx.xx
    
                              port: 80
    
                    bbb-client dir: /var/www/bigbluebutton
    

    
/var/lib/tomcat7/webapps/bigbluebutton/WEB-INF/classes/bigbluebutton.properties (bbb-web)
    
                      bbb-web host: 2xx.xxx.xxx.xx
    

    
/usr/share/red5/webapps/bigbluebutton/WEB-INF/red5-web.xml (red5)
    
                  voice conference: FreeSWITCH
    
                     capture video: true
    
                   capture desktop: true
    

    
/usr/local/bigbluebutton/core/scripts/bigbluebutton.yml (record and playback)
    
                     playback host: 2xx.xxx.xxx.xx
    

    

    
* Potential problems described below **
    
    # IP does not match:
    
    #                           IP from ifconfig: 172.xx.xxx.xx
    
    #   /etc/nginx/sites-available/bigbluebutton: 2xx.xxx.xxx.xx
    
    # Error: Unable to connect to port 1935 (RTMP) 2xx.xxx.xxx.xx
    

    
    # Error: Unable to connect to port 9123 (desktop sharing) on 212.xxx.xxx.xx

    ls -l /var/freeswitch/meetings/

    -rw-r--r-- 1 freeswitch daemon 5139984 Mar  6 11:44 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675-81976383.wav

    ls -l /usr/share/red5/webapps/video/streams/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/

    -rw-rw-r-- 1 red5 red5 438342 Mar  6 11:44 320x240-cztd6nyzasaz_1-1425642114164.flv

    ls -l /usr/share/red5/webapps/video/streams/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/

    -rw-rw-r-- 1 red5 red5 438342 Mar  6 11:44 320x240-cztd6nyzasaz_1-1425642114164.flv

    cat /usr/share/red5/webapps/video/WEB-INF/red5-web.xml

    <bean class="org.bigbluebutton.app.video.VideoApplication">
    
        <property value="true"></property>
    
        <property ref="redisRecorder"></property>
    
</bean>

    cat /usr/share/red5/webapps/deskshare/WEB-INF/red5-web.xml

     <bean class="org.bigbluebutton.deskshare.server.stream.StreamManager">
    
    
    
    
    
 </bean>

    bbb-record —watch

    Every 2.0s: bbb-record --list20                                                                                                                                   Fri Mar  6 11:53:58 2015
    

    
Internal MeetingID                                               Time                APVD APVDE RAS Slides Processed            Published           External MeetingID
    
------------------------------------------------------  ---------------------------- ---- ----- --- ------ -------------------- ------------------  -------------------
    
57d9849193299cebe9409d1c98d175958331d34a-1425642748807  Fri 6 Mar 11:52:28 GMT 2015   X                  5
    
488052dc7c095c74bf8992ec51a66298db04b765-1425642166675  Fri 6 Mar 11:42:46 GMT 2015  XXX         X       6

    bbb-record —debug

    E, [2015-03-06T11:48:20.335578 #4548] ERROR -- : Sanity check failed on 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675

    cat /var/log/bigbluebutton/archive-488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.log

    # Logfile created on 2015-03-06 11:48:19 +0000 by logger.rb/31641
    
I, [2015-03-06T11:48:19.320704 #4550]  INFO -- : Archiving events for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.
    
W, [2015-03-06T11:48:19.851280 #4550]  WARN -- : Failed to archive events for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/events.xml
    
I, [2015-03-06T11:48:19.851428 #4550]  INFO -- : Fetching the recording marks for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.
    
I, [2015-03-06T11:48:19.851501 #4550]  INFO -- : Getting record status events
    
W, [2015-03-06T11:48:19.851585 #4550]  WARN -- : Failed to fetch the recording marks for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/events.xml
    
I, [2015-03-06T11:48:19.851645 #4550]  INFO -- : Archiving audio /var/freeswitch/meetings/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675*.wav.
    
W, [2015-03-06T11:48:19.851920 #4550]  WARN -- : Failed to archive audio for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/audio
    
I, [2015-03-06T11:48:19.851981 #4550]  INFO -- : Archiving presentation for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.
    
W, [2015-03-06T11:48:19.852257 #4550]  WARN -- : Failed to archive presentations for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/presentation
    
I, [2015-03-06T11:48:19.852322 #4550]  INFO -- : Archiving deskshare for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.
    
W, [2015-03-06T11:48:19.852561 #4550]  WARN -- : Failed to archive deskshare for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/deskshare
    
I, [2015-03-06T11:48:19.852620 #4550]  INFO -- : Archiving video for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.
    
W, [2015-03-06T11:48:19.852834 #4550]  WARN -- : Failed to archive video for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/video

    all folder under /var/bigbluebutton/ have same rights (drwxrwxrwx tomcat7 tomcat7)

    ls -l /var/bigbluebutton/

    total 40
    
drwxr-xr-x 3 tomcat7 tomcat7 4096 Mar  6 11:42 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675
    
drwxr-xr-x 3 tomcat7 tomcat7 4096 Mar  6 11:52 57d9849193299cebe9409d1c98d175958331d34a-1425642748807
    
drwxrwxrwx 2 tomcat7 tomcat7 4096 Mar  3 15:52 blank
    
drwxrwxrwx 2 tomcat7 tomcat7 4096 Feb 17 17:17 configs
    
drwxrwxrwx 2 tomcat7 tomcat7 4096 Mar  3 15:57 deskshare
    
drwxrwxrwx 2 tomcat7 tomcat7 4096 Mar  3 15:57 meetings
    
drwxrwxrwx 3 tomcat7 tomcat7 4096 Mar  3 15:52 playback
    
drwxrwxrwx 3 tomcat7 tomcat7 4096 Mar  3 15:57 published
    
drwxrwxrwx 6 tomcat7 tomcat7 4096 Mar  3 15:57 recording
    
drwxrwxrwx 2 tomcat7 tomcat7 4096 Mar  3 15:57 unpublished

  • Revision 37456 : rha ... c’est vraiment du hack là

    20 avril 2010, par kent1@… — Log

    rha ... c’est vraiment du hack là

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