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  • 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 (...)

  • Les statuts des instances de mutualisation

    13 mars 2010, par

    Pour des raisons de compatibilité générale du plugin de gestion de mutualisations avec les fonctions originales de SPIP, les statuts des instances sont les mêmes que pour tout autre objets (articles...), seuls leurs noms dans l’interface change quelque peu.
    Les différents statuts possibles sont : prepa (demandé) qui correspond à une instance demandée par un utilisateur. Si le site a déjà été créé par le passé, il est passé en mode désactivé. publie (validé) qui correspond à une instance validée par un (...)

  • 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" (...)

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  • Where can I get 16-bit video sequences ? [on hold]

    9 mai 2017, par govind

    I understand that I can create 16-bit videos from 8-bit ones, but I want to work on actual 16-bit data (for a class project) and not just the bit-shifted pixel values. I just want to extract and work on the 16-bit Luma component from the video.

    https://media.xiph.org/ has 16-bit raw contents but the file size is 500GB. I would like to limit my downloads to 1-2 GB.
    The footnote at https://media.xiph.org/video/derf/ says "These were converted from 16-bit linear RGB to Y’CbCr", can I get the source from which these conversion took place.

    I could create my own content with some custom pattern but that’s not an option since I want to work on natural-looking imagery.

    I do understand that regular monitors can only display 8-bit. I also understand that it’s not a typical StackOverflow question, but I have already spent 2 hours online searching for it. Any links will be appreciated. Thanks in advance.

  • ffmpeg convert video to size 275x157 pixels [closed]

    21 janvier 2024, par degr

    I want to make video of exact size 275x157, but ffmpeg always make it 274x156.

    


    So far I try next list of commands :

    


    //it from my opinion, it should make vide of my size, and add padding if necessary, but result is same - 274x156
ffmpeg -i ScreenRecorderProject7.mkv  -strict -2 -filter:v "pad=275:157:(275-iw*min(275/iw\,157/ih))/2:(157-ih*min(275/iw\,157/ih))/2" WrathTrailer1334x750.mp4

//more advanced variant of previous command, not work also
ffmpeg -i ScreenRecorderProject7.mkv  -strict -2 -filter:v "pad=275:157:(275-iw*min(275/iw\,157/ih))/2:(157-ih*min(275/iw\,157/ih))/2" WrathTrailer1334x750.mp4

//it told width is not divisible by 2
ffmpeg -i ScreenRecorderProject5.mkv -strict -2 -vf scale=275x157 -aspect 1.75259 output.mp4

//in description it was mentioned it add 1px pad, but I feel it is wrong; result incorrect
ffmpeg -i ScreenRecorderProject5.mkv -strict -2 -vf pad="width=ceil(iw/2)*2:height=ceil(ih/2)*2" output.mp4


    


    Also I try to do so with movavi video editor, streamlabs and couple online video converters and always I'm getting wrong resolution. Cant understand what is wrong with that numbers

    


  • Best Codec and Pixel Formats to use in FFMPEG Pipeline

    19 décembre 2022, par user20623229

    I have created an FFMPEG Pipeline to stream video frames to an RTSP server. The frames are RGB frames with 3 dimensions. My pipeline command is as follows :

    


    openPipeLine = _popen("ffmpeg -f rawvideo -r 30 -video_size 720x1280 -pixel_format bgr24 -i pipe: -vcodec libx264 -crf 24 -pix_fmt yuv420p -f rtsp rtsp://localHost:8554/mystream", "w");


    


    I can barely make out the picture when I connect to the server via VLC Media. The colors seem scrambled. I've attached a sample image and the output on the server.

    


    Are there any recommended Codec's that I can use to solve this ? Perhaps the pixel format should be changed. I'm currently using a Codec and pixel format that I found online without knowing if these are the best options.
original frame
server output

    


    Thank you very much.

    


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