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  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

  • La file d’attente de SPIPmotion

    28 novembre 2010, par

    Une file d’attente stockée dans la base de donnée
    Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
    Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...)

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  • Playing With File

    8 septembre 2011, par Multimedia Mike — General

    I played with the ‘file’ utility a long time ago because I wanted to make it recognize a large number of multimedia formats. I had trouble getting my changes to take. But I’m prepared to try again after many years.

    Aiming at the Corpus
    In my local mirror of the MPlayerHQ samples archive, I find 9853 unique files. So I run all of them through the ‘file’ command :

      ’find /path/to/samples -type f -print0 | xargs -0 file —no-pad’
    

    My Ubuntu installation has file v5.04. I also tested against 5.07 and the latest, 5.08. Here is the number of files each version was unable to identify (generically marking as ‘data’) :

    5.04  1521
    5.07  1405
    5.08  1501
    

    That seems like a regression for v5.08 until I dug into the details and saw quite a few items like this, indicating that the MPEG detection could use some work :


    - mov/mov-demux-infinite-loop.mpg : DOS-executable ( +mov/mg-demux-infinite-loop.mpg : data
    - image-samples/UNeedQT4.pntg : DOS-executable ( +imY-samples/UNeedQT4.pntg : data

    Workflow
    These are just notes to myself and perhaps anyone else who wants to add new file formats to be identified by the ‘file’ command.

    First, download either the latest release from the FTP or clone from Github. Do the usual unpack, ‘./configure’, ‘make’ routine. To use this newly-built version and its associated magic file :

      ./src/file —magic-file magic/magic.mgc <file>
    

    To add a new format for ID, first, run the foregoing command to ensure that it’s not already identified. Then, check over the files in magic/Magdir and see which one might pertain to what you’re doing (it’s unlikely that your format will merit a new file in this directory). For example, for this round, I modified animation, audio, iff, and riff. Add or modify existing specs based on the copious examples in the directory and by consulting the appropriate man page (‘man 5 magic’).

    Finally, run ‘make’ again which will regenerate the magic file. Invoke the above command again to use the modified magic file.

    Before and After
    On a selection of formats taken from the samples archive (renamed and cut down to a kilobyte because detection typically only relies on the first few bytes), here is the “before” :

    amv :            RIFF (little-endian) data
    armovie :        data
    bbc-dirac :      data
    interplay-mve :  data
    mtv :            data
    nintendo-thp :   data
    nullsoft-video : data
    redcode :        data
    sega-film :      data
    smacker :        data
    trueaudio :      data
    vqa :            IFF data
    wavpack :        data
    wc3-mve :        IFF data
    wtv :            data
    

    And the “after” :

    amv :            RIFF (little-endian) data, AMV
    armovie :        ARMovie
    bbc-dirac :      BBC Dirac Video
    interplay-mve :  Interplay MVE Movie
    mtv :            MTV Multimedia File
    nintendo-thp :   Nintendo THP Multimedia
    nullsoft-video : Nullsoft Video
    redcode :        REDCode Video
    sega-film :      Sega FILM/CPK Multimedia, 320 x 224
    smacker :        RAD Game Tools Smacker Multimedia version 2, 320 x 200, 100 frames
    trueaudio :      True Audio Lossless Audio
    vqa :            IFF data, Westwood Studios VQA Multimedia, 418 video frames, 320 x 200
    wavpack :        WavPack Lossless Audio
    wc3-mve :        IFF data, Wing Commander III Video, PC version
    wtv :            Windows Television DVR Media
    

    After rerunning ‘file’ on the mphq corpus using the modified magic file, only 1329 files remain unidentified (down from 1501).

    Going Forward
    As mentioned, MPEG detection could probably be strengthened. However, a major weakness is QuickTime/MP4. Many files are not detected, probably owing to the many ways that QuickTime files can begin.

  • ffmpeg 'av_seek_frame()' not work in bink video

    19 juillet 2020, par ghoflvhxj

    I trying to use ffmpeg, to play video in my game.

    &#xA;

    when i open .avi file 'av_seek_frame()' work fine.&#xA;but if change to .bik file, it never work.&#xA;the function just return 0(which mean success) and seek to start.

    &#xA;

    anyone who know about this problem ? :(&#xA;please tell me why...

    &#xA;

    i uploaded sample player and video.&#xA;this use ffmpeg and call av_seek_frame to seek like my program.&#xA;check it please.&#xA;https://drive.google.com/file/d/1DVrX3EOzjxSfEA4EYpeSREaE2RLhB28Q/view?usp=sharing

    &#xA;

  • Using ffmpeg to change video framerate without video quality loss and keep audio ?

    31 mai 2020, par Johnny

    I recorded some game videos with my Samsung Galaxy S7 device. When I now add these videos to blender 3d in video editing, I get different video and audio frames.

    &#xA;&#xA;

    I think, that this is an fps problem, because on every recorded video I get different fps :&#xA;59.01, 59.80 etc.

    &#xA;&#xA;

    Now I want to change frame rate on all videos to 60 fps without video quality loss and keeping audio.

    &#xA;&#xA;

    So I would not have any problems in video editing.

    &#xA;&#xA;

    Does somebody have any tips ?

    &#xA;