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Autres articles (79)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

  • 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 (...)

Sur d’autres sites (9684)

  • Why use sysconf(_SC_NPROCESSORS_CONF) to get the number of CPU cores in x264 ?

    5 novembre 2017, par bknieven

    I find x264 use sysconf(_SC_NPROCESSORS_CONF) instead of sysconf(SC_NPROCESSORS_ONLN) to get the number of CPU cores.

    Here is the code snippet in x264/common/cpu.c :

    ...
    
#ifdef __ANDROID__
    
    // Android NDK does not expose sched_getaffinity
    
    return sysconf( _SC_NPROCESSORS_CONF );
    
#else
    
    ...
    
....

    And I find the difference between _SC_NPROCESSORS_CONF and _SC_NPROCESSORS_ONLN in this manual :

    sysconf (_SC_NPROCESSORS_CONF) which returns the number of processors
    the operating system configured. But it might be possible for the
    operating system to disable individual processors and so the call
    sysconf (_SC_NPROCESSORS_ONLN) returns the number of processors which
    are currently online (i.e., available).

    I have two questions :

    1. What is the difference between "the number of processors the operating system configured" and "the number of processors which are currently online" ?
    2. Why x264 use _SC_NPROCESSORS_CONF in Android to get the number of CPU cores ?

  • How to decode H264 stream to image byte array with ffmpeg in C# ?

    1er juin 2022, par massivemoisture

    I have an application in C# that receives H264 stream from a socket.

    


    The stream is in Annex B format. I want to decode the stream to individual image as a byte array.

    


    I saw this code snippet using PyAV, courtesy of leng-yue (https://github.com/leng-yue/py-scrcpy-client/blob/main/scrcpy/core.py) :

    


    raw_h264 = self.__video_socket.recv(0x10000)
                packets = codec.parse(raw_h264)
                for packet in packets:
                    frames = codec.decode(packet)
                    for frame in frames:
                        frame = frame.to_ndarray(format="bgr24")
                        if self.flip:
                            frame = cv2.flip(frame, 1)
                        self.last_frame = frame
                        self.resolution = (frame.shape[1], frame.shape[0])


    


    How can I do something similar with ffmpeg but in C# and the output is a byte array in BGR24 ? Thank you !

    


  • lavf : add new struct for data private to generic layer

    13 octobre 2024, par Anton Khirnov
    lavf : add new struct for data private to generic layer

    Trivial for now, will become more useful in future commits, as many
    
fields from FFFormatContext should not be visible to individual
    
(de)muxers.
    • [DH] libavformat/avformat_internal.h
    • [DH] libavformat/options.c

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