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  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Personnaliser en ajoutant son logo, sa bannière ou son image de fond

    5 septembre 2013, par

    Certains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;

  • 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" (...)

Sur d’autres sites (8819)

  • how to make ffmpeg output frames at correct rate down to millisecond

    9 février 2017, par Pavel K.

    using ffmpeg, i am fetching frames from udp stream (hd264 at 25 fps) using following command :

    ffmpeg -loglevel debug -i udp ://231.20.20.146:2005 -fflags nobuffer -r 1 -preset ultrafast -vf scale=432:243 -f image2pipe -vcodec ppm pipe:1

    at the other end of the pipe i am running a very simple binary which outputs the time at which it receives a frame.

    however, even though i specify fps 1, frames enter the pipe with some delay, with 100-200ms delay.

    what causes this delay ? is it the decoding of the frames and encoding of ppm image ? and how can i force ffmpeg to send images at least at the correct distance between each other, so that each frame would arrive exactly 1000ms after previous frame ?

    ps. the first 6 frames are buffered and enter the pipe almost at once. here is an example of recorded ms values :

    5350
    5368
    5385
    5493
    5599
    5676
    5785
    6221
    7243
    8235
    9218
    10219
    11227
    12268
    13268
    14242
    15288
    16219
    17297
    18222
    19284
    20272

  • how do we check similarity between hash values of two audio files in python ?

    14 avril 2022, par Reshma Walhekar

    About the data :
we have 2 video files which are same and audio of these files is also same but they differ in quality.
that is one is in 128kbps and 320kbps respectively.

    


    we have used ffmpeg to extract the audio from video, and generated the hash values for both the audio file using the code : ffmpeg -loglevel error -i 320kbps.wav -map 0 -f hash -
the output was : SHA256=4c77a4a73f9fa99ee219f0019e99a367c4ab72242623f10d1dc35d12f3be726c
similarly we did it for another audio file to which we have to compare ,
C :\FFMPEG>ffmpeg -loglevel error -i 128kbps.wav -map 0 -f hash -
SHA256=f8ca7622da40473d375765e1d4337bdf035441bbd01187b69e4d059514b2d69a

    


    Now we know that these audio files and hash values are different but we want to know how much different/similar they are actually , for eg : like some distance in a-b is say 3

    


    can someone help with this ?

    


  • avformat/mlpdec : consider all valid mlp access units when probing

    17 novembre 2015, par Hendrik Leppkes
    avformat/mlpdec : consider all valid mlp access units when probing

    Fixes probing of truehd/mlp files with a lot of frames in between the
    
major sync frames. The spec allows a distance of up to 128 frames in
    
between major sync frames, which leads to the probing code not reaching
    
the desired score.
    • [DH] libavformat/mlpdec.c

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