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Autres articles (109)

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

  • Le profil des utilisateurs

    12 avril 2011, par

    Chaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
    L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...)

  • Les sons

    15 mai 2013, par

Sur d’autres sites (12144)

  • FFMPEG : Making a specifc range of color pixels transparent

    28 décembre 2017, par Pan Ng

    I am trying to overlay one video on top of another using ffmpeg, but couldn’t quite understand the error.
    I based on the existing command from here

    More specifically, I want to replace the all colors close to a specific color (say brown r:82,g:44,b:11), and then have them set as transparent.

    ffmpeg -i moonmen.mp4 -i transparent_overlay.mp4 -filter_complex
    
"[1]split[m][a];
    
 [a]geq='if(between(r(X,Y), 77, 87)*between(g(X,Y), 39, 49)*between(b(X,Y), 06, 16) ,255:255:255,0:0:0)';
    
 [m][al]alphamerge[ovr];
    
 [0][ovr]overlay"
    
output.mp4

    but I got error :

    [Parsed_geq_1 @ 0x7fc8e2e08400] Either YCbCr or RGB but not both must be specified
    
[AVFilterGraph @ 0x7fc8e2e07c60] Error initializing filter 'geq' with args 'if(between(r(X,Y), 77, 87)*between(g(X,Y), 39, 49)*between(b(X,Y), 06, 16) ,255:255:255,0:0:0)'
    
Error initializing complex filters.
    
Invalid argument

  • Swscale color space convert interlaced frames ?

    29 mai 2012, par Nioreh

    I am writing an application that exports video that I have captured (PAL SDI). The original color space is uyvy (4:2:2). When I convert the frames with swscale to 4:2:0 and encode with avcodec I get color bleeding between the fields. I suspect this is from swscale not being aware of the frame being interlaced. Here is an example of a part of a bob-deinterlaced frame from my exported video showing one of the fields :

    color bleeding between fields

    As you can see, the color bleeds from the other field. How do I keep this from happening ? I have looked at the library and tried to find anything in swscale that tells it to respect the fields, but I haven't found anything.

    I store each field in seperate buffers, so I can process the fields individually before hand if that would help.

    Thankful for any help on this !

    Regards
    Carl

    Edit : Basically, what I want is to output PAL DV. I suspect swscale is able to somehow produce this type of interlaced 420, since ffmpeg (the application) can handle this (I think).

  • Evolution #3155 (Nouveau) : jquery color obsolète

    21 janvier 2014, par b b

    il semble qu’on pourrait se passer du script prive/javascript/jquery.colors.js d’après la doc de jQuery UI :

    jQuery UI bundles the jQuery Color plugins which provides color animations as well as many utility functions for working with colors.

    http://jqueryui.com/animate/

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