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Autres articles (49)

  • 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 (...)

  • Des sites réalisés avec MediaSPIP

    2 mai 2011, par

    Cette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
    Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

Sur d’autres sites (5509)

  • How to take screenshot (high fps) in Linux (programming)

    30 août 2014, par pirobtumen

    First of all I want to say that I’ve been reading a lot about this and I’ve learnt many ways to do it, but I haven’t been able to do it in linux.

    My project is an ambilight with arduino, so I need to take a screenshot of the desktop and analyze its colour.

    At the beginning I used Processing 2.0 with the class ’Robot’ from ’java.awt’. Initially I could take 5 frames per second and then I got 13fps. This works but I want more perfomance, so I start reading.

    In Windows or Mac you have libraries that let you access directly to the ’frameBuffer’, so you can take screenshot really ’easy’ and really fast.

    In Ubuntu I have tried python with Gtk, PIL, Qt... and the fastest way is GTK but I can only have about 15fps too.

    My problem is : I want to do it cross platform but I prefer that my program work in Linux at the beginning and then in Windows (I don’t like it too much :P).

    So, the first question : is python able to offer that perfomance ? Because I think that C++ can be a better option.

    And the second question : what do I need to do it ? I’ve read about Xlib (X11) but I can’t find documentation that let me take a screenshot. Also I know, for example, FFmpeg which is a powerful tool but I don’t know how to implement it.

    I hope that you could help me (and excuse me if I’ve made any mistakes).

  • ffmpeg filter / stuttering / how to smooth camera movement

    23 juin 2018, par Deex

    I’m using ffmpeg witht he following code for some camera movement effects.

     -filter:v "crop=in_w/1.2:in_h/1.2:(in_w-out_w)/2+((in_w-out_w)/2)*sin(t*0.1):(in_h-out_h)/2 +((in_h-out_h)/2)*sin(t*0.4)"

    Its working but the camera movement is stuttering and looks realy ugly that way (also on 60 fps). I hope someone could lead me to a idea to have a more smooth movement.

  • Export dynamic metadata using x265

    28 août 2018, par nam

    I am working on ffmpeg and x265 for video encoding. From the release note of x265 :

    HDR10+ supported. Dynamic metadata may be either supplied as a bitstream via the userSEI field of x265_picture, or as a json jile that can be parsed by x265 and inserted into the bitstream ; use —dhdr10-info to specify json file name, and —dhdr10-opt to enable optimization of inserting tone-map information only at IDR frames, or when the tone map information changes.

    But I dont know how to export the dynamic metadata from a video sequence as a userSEI or json file. Hope to get solution from you.

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