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Autres articles (105)

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

  • Participer à sa traduction

    10 avril 2011

    Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
    Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
    Actuellement MediaSPIP n’est disponible qu’en français et (...)

  • 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

Sur d’autres sites (11354)

  • Setting qscale programmatically when using MPEG4 encoder ( for constant quality / VBR)

    14 février 2019, par Dennis

    i implemented the possibility to encode various self-rendered video-frames with MPEG4 codec and create an .mp4 video file. This works fine. Now i want to add the possibility to define a quality slider (0-100%) to parameterize a factor for constant quality (VBR). I don’t know how to do that.

    I found out that -qscale seems to do what i want, so i looked in ffmpeg_opt.c what happens there and tried the same :

    config.codecContext->flags |= AV_CODEC_FLAG_QSCALE;
    
config.codecContext->global_quality = FF_QP2LAMBDA * QualityLvl;

    with :

    • "config.codecContext" being the code context
    • "FF_QP2LAMBDA" being 118
    • "QualityLvl" is the "factor for constant quality" (has to be an int between 1 and 31 according to this :
      https://trac.ffmpeg.org/wiki/Encode/MPEG-4)

    The problem is, that it actually doesn’t matter if "QualityLvl" is 1,2 or 30 it always results in the same file size and a visually same(?) video file. I would have expected file size and quality differences ?!

  • Convert mp3 to AAC with mpeg-2 container (FFMPEG)

    18 mars 2016, par jsurf

    I’m trying to convert an mp3 audio file to an AAC file with FFMPEG, and I need the audio to be wrapped in an MPEG-2 container.
    The resulting AAC file needs to be AAC-LC (Low Complexity), 1-channel, CBR mode, 44100 sample rate, and 48kb/s bitrate, so I use this command :

    ffmpeg -y -i input.mp3 -ar 44100 -ab 48k -acodec libfdk_aac -ac 1 output.aac

    But when I examine the ADTS headers, the audio file is always being wrapped in an MPEG-4 container. I have tried all the codecs listed here but I still end up with an mpeg-4 container wrapped around the audio : http://trac.ffmpeg.org/wiki/AACEncodingGuide.

    Here are the headers I get when examining the AAC output file :

    mpeg_type : ’MPEG4’,
    profile : 2,
    profile_name : ’AAC LC’,
    sample_freq : 44100,
    channel_config : 1,
    channels : 1,
    frame_length : 139,
    buffer_fullness : 157,
    number_of_frames : 1,
    frames_per_sec : 43.06640625

    Any ideas as to why ffmpeg wraps an mp4 container around the audio ? Can I get around this somehow ? Are there any other encoders I can try aside from FFMPEG ? I was giving FAAC encoder a shot and it gives me the proper encoding and ADTS headers, but alas it does not support mp3, only WAV.

  • Official Debian Package for Piwik now available

    15 avril 2014, par Matthieu Aubry — Community, Meta

    We are excited to announce the release of Piwik package for Debian based linux distributions !

    There are several ways to use Piwik :

    - Download and upload to your server

    - or use 1-click Piwik installers

    - or use Microsoft web app gallery

    - or buy Piwik Cloud

    - or as of today, you may get Piwik using our Debian package

    What are the benefits of using Debian package over direct download ?

    For some system administrators, using Debian package is an easier alternative than directly downloading the code. It allows sysadmins to deploy Piwik within seconds using “apt-get install piwik -V”.

    How do I install Piwik using official debian package ?

    The package supports Apache and Nginx web servers. Read the documentation at debian.piwik.org.

    Do I have to use the Debian Package on my debian system ?

    No, you may still want to use Piwik using the direct download approach. You can keep Piwik upgraded quite easily using the popular 1-click automatic update.

    How do I report a bug or feedback ?

    Create a ticket on the Github project Issues page.

    Will the debian repository be maintained in the future ?

    Yes, Aurélien Requiem (github) along with the Piwik team are committed to maintain the Debian Piwik repository in the future.

    Thank you to Aurélien for his great work on preparing, testing, and maintaining the Debian repository for Piwik.

    References

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