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Autres articles (95)

  • Les sons

    15 mai 2013, par

  • Automated installation script of MediaSPIP

    25 avril 2011, par

    To overcome the difficulties mainly due to the installation of server side software dependencies, an "all-in-one" installation script written in bash was created to facilitate this step on a server with a compatible Linux distribution.
    You must have access to your server via SSH and a root account to use it, which will install the dependencies. Contact your provider if you do not have that.
    The documentation of the use of this installation script is available here.
    The code of this (...)

  • MediaSPIP en mode privé (Intranet)

    17 septembre 2013, par

    À partir de la version 0.3, un canal de MediaSPIP peut devenir privé, bloqué à toute personne non identifiée grâce au plugin "Intranet/extranet".
    Le plugin Intranet/extranet, lorsqu’il est activé, permet de bloquer l’accès au canal à tout visiteur non identifié, l’empêchant d’accéder au contenu en le redirigeant systématiquement vers le formulaire d’identification.
    Ce système peut être particulièrement utile pour certaines utilisations comme : Atelier de travail avec des enfants dont le contenu ne doit pas (...)

Sur d’autres sites (11784)

  • How can I intercept encoded video data using ffmpeg with C ?

    24 février 2017, par TerNer

    First of all, I hope you’ll understand my poor english skill. I’ll do my best to write question about it.

    I’m currently developing some application. That application will captures desktop and encodes to MP4 video and send mp4 video data/chunks to another clients (all this process should run in memory not file). so another client should can play mp4 video/data/chunks that received from server.

    so I used avio = avio_open(...) and reassigned write function as like avio->write_packet = some_function. but this way seems not "generate" mp4 file/chunk correctly. and It seems the original write_packet callback having actual logic that write packet to a file. but I don’t want to write to a file. so I was thinking about it for a week but I did’t getting any of idea about it.

    so my question is : How can I intercept "encoded" video data that should processed by avio->write_packet ?

  • Compression of a video with constant background

    28 juin 2017, par Spirou003

    (sorry if my english is bad, I can read it but I don’t write it quite well...)

    I want to compress some videos, which have two particularities :

    • there is a background that covers 90% of the area, during the whole video
    • most of the others elements can be separately described by a picture in move

    My videos are like this one, and don’t have audio. As you can see, almost everything can be described only by using a fixed background, few small images in move, plus a noise. Moreover, this noise will be almost nul and then an entropic coding would be very efficient. I think it will produce tiny files (< 5 Mo) even if the duration is in hours, a result that is very appreciable since I have actually recorded 30h of game (actual size is 3 Go).

    Is there any way to get new video files, that benefit of these informations ? If yes, what are the implication of a such encoding for watching these videos with Windows Media Player, or for usage with ffmpeg ?

    I searched with Google after anything that can help me, but I don’t know which keyword I can use for this, then I didn’t found anything usefull :-(

    Thanks in advance :-)

    PS : another example, the video is accelerated but shows the interesting moves

  • In some cases, the value of FFmpegMSS is null

    16 février 2018, par Sanhei
    Uri uri = new Uri("https://cloud189-nj.oos-js.ctyunapi.cn/68e09e6a-3a50-4f7b-ba59-968d61dcb771?response-content-type=video/mp4&amp;Expires=1518683112&amp;response-content-disposition=attachment%3Bfilename%3D%22%5BUHA-WINGS%5D%5BKakegurui%5D%5B01%5D%5B720p%5D%5BGB%5D.mp4%22&amp;AWSAccessKeyId=ad2d051c334eb8bbf4c1&amp;Signature=22RXF7qDozpBQNl44/QVx62Anv4%3D");
    
var FFmpegMSS = FFmpegInteropMSS.CreateFFmpegInteropMSSFromUri(uri, true, true);

    When the value of uri is "http://edge.ivideo.sina.com.cn/31451018.flv?KID=sina,viask&Expires=1518796800&ssig=7zn7dHMQVK",the program can run normally

    What is the difference between them ?
    How do I modify the code to make ffmpeg work properly ?

    My English is not good, I’m sorry for the inconvenience.

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