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Autres articles (43)

  • 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 (...)

  • Installation en mode ferme

    4 février 2011, par

    Le mode ferme permet d’héberger plusieurs sites de type MediaSPIP en n’installant qu’une seule fois son noyau fonctionnel.
    C’est la méthode que nous utilisons sur cette même plateforme.
    L’utilisation en mode ferme nécessite de connaïtre un peu le mécanisme de SPIP contrairement à la version standalone qui ne nécessite pas réellement de connaissances spécifique puisque l’espace privé habituel de SPIP n’est plus utilisé.
    Dans un premier temps, vous devez avoir installé les mêmes fichiers que l’installation (...)

  • Submit bugs and patches

    13 avril 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
    You may also (...)

Sur d’autres sites (10336)

  • Android MediaCodec change resolution

    3 mars 2015, par user3265561

    I am passing the output of a MediaExtractor into a MediaCodec decoder, and then passing the decoder’s output buffer to an encoder’s input buffer. The problem I have is that I need to reduce the resolution from the 1920x1080 output from the decoder to 1280x720 by the time it comes out of the encoder. I can do this using a Surface, but I am trying to target Android 4.1 so will need to achieve this another way. Does anyone know how to change the resolution of a video file using MediaCodec but in a way that is compatible with 4.1 ?

  • ffmpeg resizing video puts it at wrong resolution

    16 décembre 2015, par agmcleod

    I have a 1080p video that i’m trying to resize for an iOS app upload. So i tried scaling it to the iPhone 6 resolution of 1334x750 :

    ffmpeg -i WrathTrailer.mp4 -strict -2 -vf scale=1334:750 WrathTrailer1334x750.mp4

    The output file comes to 1333x750. iTunes connect won’t accept it. Any ideas ?

  • Quick way to extract frames in low resolution

    29 mars 2013, par Lescott

    I have a video (640x320) which I need to decode in frame array (BufferedImage's in 100x100 size).

    I can solve this problem with IMediaReader and MediaListenerAdapter by the following slow way.

    // create reader and add listener
    
reader = ToolFactory.makeReader("video.mp4");
    
reader.setBufferedImageTypeToGenerate(BufferedImage.TYPE_3BYTE_BGR);
    
reader.addListener(new ImageSnapListener());
    

    
//change scale of pictures in onVideoPicture
    
public void onVideoPicture(IVideoPictureEvent event) {
    
  ...check the stream number...
    
  results.add(event.getImage().getScaledInstance(100, 100, Image.SCALE_SMOOTH));
    
}

    But this way is really slow. Even without images scaling it works 30 seconds on 54 MB file, whereas ffmpeg can extract 100x100 frames in 8 seconds.

    ffmpeg -vf select='eq(pic_type\,I)' -i video.mp4 -s 100x100 /tmp/frames/%0d.bmp

    So, is there any faster in-memory way to extract frames in low resolution ?

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