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  • Les vidéos

    21 avril 2011, par

    Comme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
    Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
    Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...)

  • Les tâches Cron régulières de la ferme

    1er décembre 2010, par

    La gestion de la ferme passe par l’exécution à intervalle régulier de plusieurs tâches répétitives dites Cron.
    Le super Cron (gestion_mutu_super_cron)
    Cette tâche, planifiée chaque minute, a pour simple effet d’appeler le Cron de l’ensemble des instances de la mutualisation régulièrement. Couplée avec un Cron système sur le site central de la mutualisation, cela permet de simplement générer des visites régulières sur les différents sites et éviter que les tâches des sites peu visités soient trop (...)

  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

Sur d’autres sites (3172)

  • What options are available for speeding up video load times on a webpage when video is hosted on IPFS

    10 août 2022, par Ryan D

    I have a site that pulls videos hosted on IPFS (Interplanetary File System), most of the videos load and play fine but if a user doesn't have a strong internet connection or if a larger video, it constantly buffer's and play's choppy.

    


    Since the video isn't hosted on my server i'm not sure what options I have to help speed the load times up. The original video is uploaded to my site though and I pass it to IPFS to upload directly. I don't currently download it to my server first to speed up the uploading process, or so the user doesn't need to wait for a double upload.

    


    I know youTube has a compression algorithm and does something with chopping up the video into chunks or something but i'm not sure exactly how that works. Im not very experienced with video codec and encoding. Ive heard good things about FFmpeg but not sure if that would help my current situation.

    


    Any ideas or tools I should look into that may help me out would be appreciated. For larger videos I could download to my server first if theres a compression mechanism or something I could apply first to help the overall load times of the site although not ideal for the user uploading.

    


    Im using videoJS for my video player with preload set to auto if that helps at all.

    


    <video width="320" height="240" controls="controls" class="video-js video" poster="{Image URL}">&#xA;    <source src="{IPFS URL}" type="video/mp4">&#xA;</source></video>&#xA;

    &#xA;

    Options im currently using

    &#xA;

    Load the video after the DOM has loaded to not slow down page loads

    &#xA;

    Preload the video

    &#xA;

    &#xA;

    &#xA;

    Although I don't think that does much.

    &#xA;

    Other than that I don't know what else I can do. Im good with PHP and or Javascript to handle this task if theres something I should look into.

    &#xA;

    Thanks !

    &#xA;

  • FFMPEG - Add (white, color-less, analog) grain to the video without desaturating video itself

    2 décembre 2018, par dd_code

    I am working on old videos where I am basically converting them to HVEC and sharpening, so i.e. my command can look like this

    .\ffmpeg.exe -i F:\file.mkv -vf unsharp=3:3:1.5 -c:v hevc_nvenc -qp 27 -a:c copy file_new.mkv

    inherent problem with this is, of course that with reducing bitrate and sharpening every now and then I can notice some nasty artifacts around the edges and on at plain-color objects.

    I noticed with some older, many times remastered movies/series that they have quite a lot of grain in the video, so I was thinking - what if I add grain and help it to mask the compression and sharpening artifacts ?

    After bit of searching I got to
    https://ffmpeg.org/ffmpeg-filters.html#noise
    and now I am using this command

    .\ffmpeg.exe -i F:\file.mkv -vf unsharp=3:3:1.5,noise=alls=14:allf=t+u -c:v hevc_nvenc -qp 30 -a:c copy file_new.mkv

    however this has one big problem, it is merely a digital RGB noise, is there a way to make it desaturated, analog-ish ? I tried adding h=s=0, however this is applying 0 saturation to the video track as a whole. Is there an effect which would achieve this or is there a way that I can reduce the saturation only of the very effect which then gets to "overlay" the video track, so the track would not be touched ?

  • Merge commit ’106b62f4ba600f24415eaded5e020aeceb23fd59’

    28 mai 2014, par Michael Niedermayer
    Merge commit ’106b62f4ba600f24415eaded5e020aeceb23fd59’

    * commit ’106b62f4ba600f24415eaded5e020aeceb23fd59’ :
    
  matroskaenc : write the channel mask for FLAC
    

    Conflicts :
    
	libavformat/matroskaenc.c
    

    Merged-by : Michael Niedermayer <michaelni@gmx.at>
    • [DH] libavformat/Makefile
    • [DH] libavformat/matroskaenc.c

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