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  • Gestion des droits de création et d’édition des objets

    8 février 2011, par

    Par défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;

  • Dépôt de média et thèmes par FTP

    31 mai 2013, par

    L’outil MédiaSPIP traite aussi les média transférés par la voie FTP. Si vous préférez déposer par cette voie, récupérez les identifiants d’accès vers votre site MédiaSPIP et utilisez votre client FTP favori.
    Vous trouverez dès le départ les dossiers suivants dans votre espace FTP : config/ : dossier de configuration du site IMG/ : dossier des média déjà traités et en ligne sur le site local/ : répertoire cache du site web themes/ : les thèmes ou les feuilles de style personnalisées tmp/ : dossier de travail (...)

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

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  • VideoCapture always returns False in Python OPENCV [Linux]

    7 avril 2017, par Daniyal Shahrokhian

    Every time that I use VideoCapture trying to access the frames from a video file, the return value (ret) is false. See the sample code below :

    cap = cv2.VideoCapture('asd.mkv')
    
    vid = []
    
    while True:
    
        ret, img = cap.read()
    
        if not ret: # Always happens
    
            break
    
        vid.append(cv2.resize(img, (171, 128)))

    I have already tried absolutely everything I could find today by googling, including the OpenCV guide and this long issue on Github. Also, I read some solutions involving moving ffmpeg dll files, but that only was in the case of Windows.

    Any ideas ? Because I defenitely ran out of them.

  • VideoCapture always returns False in Python OPENCV [Linux]

    26 octobre 2017, par Daniyal Shahrokhian

    Every time that I use VideoCapture trying to access the frames from a video file, the return value (ret) is false. See the sample code below :

    cap = cv2.VideoCapture('asd.mkv')
    
    vid = []
    
    while True:
    
        ret, img = cap.read()
    
        if not ret: # Always happens
    
            break
    
        vid.append(cv2.resize(img, (171, 128)))

    I have already tried absolutely everything I could find today by googling, including the OpenCV guide and this long issue on Github. Also, I read some solutions involving moving ffmpeg dll files, but that only was in the case of Windows.

    Any ideas ? Because I defenitely ran out of them.

  • FFmpeg av_read_frame returns a size but no data ?

    11 décembre 2013, par tommed

    I have written some C code to access ffmpeg and wrapped it in a C++/CLI (.NET managed) class. The program fetches a live video stream and extracts frames and converts them to PNG files.

    Unfortunately the images that are saved to disk are always black (opening them in Notepad++ shows that they are full of nulls).

    I am using the assemblies aformat/codec-55.dll and the development headers and libs for compilation from ffmpeg-20131120-git-e502783-win64-dev. The whole project is compiled using Managed C++ (Cpp/cli) .NET 4.0 for 64-bit.

    After some investigation the problem appears to be that av_read_frame fills the AVPacket->size value correctly, but the AVPAcket->data is always null. When the frame is finished (got==1) then the data for the AVFrame is just a matrix of nulls. :(

    Here is the code :
    Example code (sorry, but it didnt paste well into SO)

    I think the problem is at line 34 when the packet is returned like so :
    size is set but data is empty

    Please, how can I get this to work ? What have I done wrong ?

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