Recherche avancée

Médias (0)

Mot : - Tags -/médias

Aucun média correspondant à vos critères n’est disponible sur le site.

Autres articles (65)

  • 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 (...)

  • Support de tous types de médias

    10 avril 2011

    Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

Sur d’autres sites (7451)

  • Google Colan installs ffmpeg very slowly

    10 juillet 2020, par apegdro

    I'm using the command ' !apt install ffmpeg' and each time I run it in Google Colab it takes anywhere from 10 to 30-40 minutes to finish loading/installing.

    


    Anyone got a clue on why is that ? And possibly how to fix it ? Everything else I run loads in a matter of seconds or a few minutes.

    


  • 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).

Navigation