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  • Pas question de marché, de cloud etc...

    10 avril 2011

    Le vocabulaire utilisé sur ce site essaie d’éviter toute référence à la mode qui fleurit allègrement
    sur le web 2.0 et dans les entreprises qui en vivent.
    Vous êtes donc invité à bannir l’utilisation des termes "Brand", "Cloud", "Marché" etc...
    Notre motivation est avant tout de créer un outil simple, accessible à pour tout le monde, favorisant
    le partage de créations sur Internet et permettant aux auteurs de garder une autonomie optimale.
    Aucun "contrat Gold ou Premium" n’est donc prévu, aucun (...)

  • Activation de l’inscription des visiteurs

    12 avril 2011, par

    Il est également possible d’activer l’inscription des visiteurs ce qui permettra à tout un chacun d’ouvrir soit même un compte sur le canal en question dans le cadre de projets ouverts par exemple.
    Pour ce faire, il suffit d’aller dans l’espace de configuration du site en choisissant le sous menus "Gestion des utilisateurs". Le premier formulaire visible correspond à cette fonctionnalité.
    Par défaut, MediaSPIP a créé lors de son initialisation un élément de menu dans le menu du haut de la page menant (...)

  • 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 (11299)

  • FFMPEG best options for playing several files over a network

    7 juillet 2019, par Manity

    Im using a WPF ffmpeg control wrapper, that uses the ffmpeg library. Using this control wrapper i am loading 4 videos at the same time, stored on network locations. the files are opened 4 at a time, played then a user can move to the next 4 files and they are loaded and played at the same time and so on and on.

    Ignoring the wrapper my question is specifically about what properties or protocols can i experiment with or adjust on FFMPEG that could help with playing 4 video files at a time, repeatedly.
    The files are mp4 files stored on a network server, that can be busy so i need to deal with latency on load and playing and stop the loading of videos from timing out.

    The videos are not streamed, they are mp4 stored on a network that can be busy.

    for example i looked at the async option in FFMPEG.
    Asynchronous data filling wrapper for input stream. I cant really find a lot of info on this and have no idea if it would improve things or not.

    So what other features or protocols can i try with ffmpeg to improve reliability on how im using it ?

    any advice appreciated.

  • Introducing WebM, an open web media project

    19 mai 2010, par noreply@blogger.com (christosap)

    A key factor in the web’s success is that its core technologies such as HTML, HTTP, TCP/IP, etc. are open and freely implementable. Though video is also now core to the web experience, there is unfortunately no open and free video format that is on par with the leading commercial choices. To that end, we are excited to introduce WebM, a broadly-backed community effort to develop a world-class media format for the open web.

    WebM includes :

    • VP8, a high-quality video codec we are releasing today under a BSD-style, royalty-free license
    • Vorbis, an already open source and broadly implemented audio codec
    • a container format based on a subset of the Matroska media container

    The team that created VP8 have been pioneers in video codec development for over a decade. VP8 delivers high quality video while efficiently adapting to the varying processing and bandwidth conditions found on today’s broad range of web-connected devices. VP8’s efficient bandwidth usage will mean lower serving costs for content publishers and high quality video for end-users. The codec’s relative simplicity makes it easy to integrate into existing environments and requires less manual tuning to produce high quality results. These existing attributes and the rapid innovation we expect through the open-development process make VP8 well suited for the unique requirements of video on the web.

    A developer preview of WebM and VP8, including source code, specs, and encoding tools is available today at www.webmproject.org.

    We want to thank the many industry leaders and web community members who are collaborating on the development of WebM and integrating it into their products. Check out what Mozilla, Opera, Google Chrome, Adobe, and many others below have to say about the importance of WebM to the future of web video.


    Telestream

    Posted by Jeremy Doig, Engineering Director of video and Mike Jazayeri, Group Product Manager, Google

  • MP4 container parsing : What is 'Alias Data Handler' for ?

    8 février 2023, par Michael IV

    I have an mp4 file which I am parsing with this demuxer lib. I stumbled upon a bug when trying to identify a track type. MP4 container keeps this info in hdlr box. In the docs and in the lib there are only two options 'vide' or 'soun',but in this case I am getting 'alis'.
While debugging the lib to see how I get this value I noticed that the parser hits 'hdlr' twice : first time setting 'vide' for the only video track in the file, and second time overwriting with 'alis'.
I have loaded the video into MP4 Explorer GUI app and here is what I see :

    


    enter image description here

    


    Indeed,there is second hdlr box there,which doesn't exist in other mp4 files I tried to parse. My questions are :

    


      

    1. What is this token for ?

      2. 


    2. When is it inserted into mp4 ?

      3. 


    3. Can I just discard 'alis' when encountering one during the parsing ?

      4. 


    


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