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  • 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 (...)

  • Taille des images et des logos définissables

    9 février 2011, par

    Dans beaucoup d’endroits du site, logos et images sont redimensionnées pour correspondre aux emplacements définis par les thèmes. L’ensemble des ces tailles pouvant changer d’un thème à un autre peuvent être définies directement dans le thème et éviter ainsi à l’utilisateur de devoir les configurer manuellement après avoir changé l’apparence de son site.
    Ces tailles d’images sont également disponibles dans la configuration spécifique de MediaSPIP Core. La taille maximale du logo du site en pixels, on permet (...)

  • 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 (...)

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    Core : Added new event

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  • DASH package (mpd) I made freezes after raising the onratechange event

    7 mars 2016, par Nick Birke

    I am trying to created an adaptive stream from an mp4 file. I have a decent amount of experience at doing streaming, and have successfully implemented smooth streaming via Silverlight. We want a solution for everything that works in HTML5. I am pursuing DASH. So here are the steps I take...

    1. Resample the mp4 to different sizes using ffmpeg.
    2. Ensure the files are properly fragmented using Bento4s mp4Fragment utility.
    3. Create the DASH mpd file and associated segments using Bento4s mp4dash utility.

    I have done a lot of work to learn each of these utilities and create a process that gets to output that I think will work. To create reliable DASH artifacts. But it seems I am doing something wrong. Here are examples of command lines I run.

    For step one I create three different files... for three different rates and sizes... (these may not be the exact command lines, they are from old notes... but the parameter values are the ones I am using for sure)

    ffmpeg -y -i C:\_SIMULATED_SHARE_C\ff\big_buck_bunny.mp4 -c:v libx264 -x264opts keyint=24:min-keyint=24:no-scenecut -b:v 1500k -maxrate 1500k -bufsize 1000k -vf "scale=-1:720" C:\_SIMULATED_SHARE_C\ff\output\outputfile720.mp4
    

    
ffmpeg -y -i C:\_SIMULATED_SHARE_C\ff\big_buck_bunny.mp4 -c:v libx264 -x264opts keyint=24:min-keyint=24:no-scenecut -b:v 800k -maxrate 800k -bufsize 500k -vf "scale=-1:540" C:\_SIMULATED_SHARE_C\ff\output\outputfile540.mp4
    

    
ffmpeg -y -i C:\_SIMULATED_SHARE_C\ff\big_buck_bunny.mp4 -c:v libx264 -x264opts keyint=24:min-keyint=24:no-scenecut -b:v 400k -maxrate 400k -bufsize 400k -vf "scale=-1:360" C:\_SIMULATED_SHARE_C\ff\output\outputfile360.mp4

    So that gives you the three files that need to be fragmented. So I fragment them using the mp4fragment utility from Bento4. That command line is simple so I will not offer an example.

    The I use Bento4s mp4dash to create the dash. Something like this...

    "E:\\_INSTALL\\Bento4\\Bento4-SDK-1-4-3-607.x86-microsoft-win32-vs2010\\Bento4-SDK-1-4-3-607.x86-microsoft-win32-vs2010\\bin\\mp4dash.exe --mpd-name=\"\\\\d9fqt52\\_SIMULATED_SHARE_C\\ff\\output\\dash\\something.mpd\" -f -o \"\\\\d9fqt52\\_SIMULATED_SHARE_C\\ff\\output\\dash\" \"\\\\d9fqt52\\_SIMULATED_SHARE_C\\ff\\output\\bunny360f.mp4\" \"\\\\d9fqt52\\_SIMULATED_SHARE_C\\ff\\output\\bunny540f.mp4\" \"\\\\d9fqt52\\_SIMULATED_SHARE_C\\ff\\output\\bunny720f.mp4\" "

    This runs ok. And creates the mpd file, an audio folder with segment files, an a video folder with 3 folders each with the segment files.

    I am able to configure IIS to play the mpd ok. As well as the segement files. The video plays fine... and then it stops. It freezes between 50 and 60 seconds. Right before it freezes I can confirm that the onratechange event of the HTML5 video tag is raised. This is an event that is raised with the rate of play is changed. I do nothing to change this it just happens.

    The actual video in question is about 1hr long. Also I am using the dash.js library as a player.

    If you can identify any components or specifics I should change please let me know !

    UPDATE ON MAR 7, 2016

    As requested here is the MPD content...

    &lt;?xml version="1.0" ?>
    
<mpd mediapresentationduration="PT51M51.909S" minbuffertime="PT0.80S" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="static" xmlns="urn:mpeg:dash:schema:mpd:2011">
    
  
    
  <period>
    
    
    
    <adaptationset lang="en" mimetype="audio/mp4" segmentalignment="true" startwithsap="1">
    
      <segmenttemplate duration="801" initialization="$RepresentationID$/init.mp4" media="$RepresentationID$/seg-$Number$.m4f" startnumber="1" timescale="1000"></segmenttemplate>
    
      <representation audiosamplingrate="48000" bandwidth="132491" codecs="mp4a.40.2">
    
        <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"></audiochannelconfiguration>
    
      </representation>
    
    </adaptationset>
    
    
    
    <adaptationset maxheight="720" maxwidth="1280" mimetype="video/mp4" minheight="540" minwidth="640" segmentalignment="true" startwithsap="1">
    
      <segmenttemplate duration="801" initialization="$RepresentationID$/init.mp4" media="$RepresentationID$/seg-$Number$.m4f" startnumber="1" timescale="1000"></segmenttemplate>
    
      <representation bandwidth="785536" codecs="avc1.64001F" framerate="30000/1001" height="540" scantype="progressive" width="960"></representation>
    
      <representation bandwidth="403537" codecs="avc1.64001E" framerate="30000/1001" height="360" scantype="progressive" width="640"></representation>
    
      <representation bandwidth="1496514" codecs="avc1.64001F" framerate="30000/1001" height="720" scantype="progressive" width="1280"></representation>
    
    </adaptationset>
    
  </period>
    
</mpd>

    UPDATE ON MAR 7, 2016

    Here is the console output for two different videos that just stop for some unknown reason between 50 and 60s

    ///ABS VIDEO 
    

    
58393][rulesController] [RULES]: playbackTimeRule [Fragment:download,82,MediaSegment,0video] Default 
    
dash.all.js:11 [58395][rulesController] [RULES]: sameTimeRequestRule [Fragment:download,82,MediaSegment,0,video] Default 
    
dash.all.js:11 [58401][indexHandler][audio] Getting the request for time: 82.082 
    
dash.all.js:11 [58403][indexHandler][audio] Index for time 82.082 is 81 
    
dash.all.js:11 [58405][indexHandler][audio] SegmentTemplate: 81.08099999999999 / 1361.235 
    
dash.all.js:11 [58406][indexHandler][audio] SegmentTemplate: 82.082 / 1361.235 
    
dash.all.js:11 [58407][rulesController] [RULES]: playbackTimeRule [Fragment:download,82,MediaSegment,0audio] Default 
    
dash.all.js:11 [58417][fragmentLoader] loaded video:MediaSegment:82.082 (200, 18ms, 2ms) 
    
dash.all.js:11 [58419][rulesController] [RULES]: sameTimeRequestRule [Fragment:download,82,MediaSegment,0,audio] Default 
    
dash.all.js:11 [58435][fragmentLoader] loaded audio:MediaSegment:82.082 (200, 14ms, 0ms) 
    
dash.all.js:11 [59390][indexHandler][video] Getting the request for time: 83.083 
    
dash.all.js:11 [59392][indexHandler][video] Index for time 83.083 is 82 
    
dash.all.js:11 [59393][indexHandler][video] SegmentTemplate: 82.082 / 1361.235 
    
dash.all.js:11 [59394][indexHandler][video] SegmentTemplate: 83.08299999999998 / 1361.235 
    
dash.all.js:11 [59395][rulesController] [RULES]: playbackTimeRule [Fragment:download,83,MediaSegment,0video] Default 
    
dash.all.js:11 [59396][rulesController] [RULES]: sameTimeRequestRule [Fragment:download,83,MediaSegment,0,video] Default 
    
dash.all.js:11 [59401][indexHandler][audio] Getting the request for time: 83.083 
    
dash.all.js:11 [59403][indexHandler][audio] Index for time 83.083 is 82 
    
dash.all.js:11 [59404][indexHandler][audio] SegmentTemplate: 82.082 / 1361.235 
    
dash.all.js:11 [59406][indexHandler][audio] SegmentTemplate: 83.08299999999998 / 1361.235 
    
dash.all.js:11 [59408][rulesController] [RULES]: playbackTimeRule [Fragment:download,83,MediaSegment,0audio] Default 
    
dash.all.js:11 [59416][fragmentLoader] loaded video:MediaSegment:83.08299999999998 (200, 17ms, 1ms) 
    
dash.all.js:11 [59418][rulesController] [RULES]: sameTimeRequestRule [Fragment:download,83,MediaSegment,0,audio] Default 
    
dash.all.js:11 [59437][fragmentLoader] loaded audio:MediaSegment:83.08299999999998 (200, 14ms, 1ms) 
    
dash.all.js:11 [59902][scheduleController][video] Stalling Buffer 
    
dash.all.js:11 [59903][bufferController][video] Waiting for more buffer before starting playback. 
    
dash.all.js:11 [59906][scheduleController][audio] Stalling Buffer 
    
dash.all.js:11 [59907][bufferController][audio] Waiting for more buffer before starting playback. 
    
dash.all.js:11 [63684][playbackController] <video> ratechange:  0 
    

    

    

    

    
///HOG VIDEO
    

    
[58250][rulesController] [RULES]: playbackTimeRule [Fragment:download,105,MediaSegment,0audio] Default 
    
dash.all.js:11 [58266][fragmentLoader] loaded video:MediaSegment:84.105 (200, 28ms, 1ms) 
    
dash.all.js:11 [58269][rulesController] [RULES]: sameTimeRequestRule [Fragment:download,105,MediaSegment,0,audio] Default 
    
dash.all.js:11 [58287][fragmentLoader] loaded audio:MediaSegment:84.105 (200, 14ms, 1ms) 
    
dash.all.js:11 [58982][indexHandler][video] Getting the request for time: 84.906 
    
dash.all.js:11 [58983][indexHandler][video] Index for time 84.906 is 105 
    
dash.all.js:11 [58984][indexHandler][video] SegmentTemplate: 84.105 / 3111.909 
    
dash.all.js:11 [58984][indexHandler][video] SegmentTemplate: 84.906 / 3111.909 
    
dash.all.js:11 [58985][rulesController] [RULES]: playbackTimeRule [Fragment:download,106,MediaSegment,0video] Default 
    
dash.all.js:11 [58986][rulesController] [RULES]: sameTimeRequestRule [Fragment:download,106,MediaSegment,0,video] Default 
    
dash.all.js:11 [58989][indexHandler][audio] Getting the request for time: 84.906 
    
dash.all.js:11 [58990][indexHandler][audio] Index for time 84.906 is 105 
    
dash.all.js:11 [58991][indexHandler][audio] SegmentTemplate: 84.105 / 3111.909 
    
dash.all.js:11 [58992][indexHandler][audio] SegmentTemplate: 84.906 / 3111.909 
    
dash.all.js:11 [58993][rulesController] [RULES]: playbackTimeRule [Fragment:download,106,MediaSegment,0audio] Default 
    
dash.all.js:11 [59002][fragmentLoader] loaded video:MediaSegment:84.906 (200, 14ms, 1ms) 
    
dash.all.js:11 [59003][rulesController] [RULES]: sameTimeRequestRule [Fragment:download,106,MediaSegment,0,audio] Default 
    
dash.all.js:11 [59014][fragmentLoader] loaded audio:MediaSegment:84.906 (200, 8ms, 1ms) 
    
dash.all.js:11 [59735][scheduleController][video] Stalling Buffer 
    
dash.all.js:11 [59736][bufferController][video] Waiting for more buffer before starting playback. 
    
dash.all.js:11 [59738][scheduleController][audio] Stalling Buffer 
    
dash.all.js:11 [59739][bufferController][audio] Waiting for more buffer before starting playback. 
    
dash.all.js:11 [61695][playbackController] <video> ratechange:  0 
    
</video></video>

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