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  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

  • 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" (...)

  • Other interesting software

    13 avril 2011, par

    We don’t claim to be the only ones doing what we do ... and especially not to assert claims to be the best either ... What we do, we just try to do it well and getting better ...
    The following list represents softwares that tend to be more or less as MediaSPIP or that MediaSPIP tries more or less to do the same, whatever ...
    We don’t know them, we didn’t try them, but you can take a peek.
    Videopress
    Website : http://videopress.com/
    License : GNU/GPL v2
    Source code : (...)

Sur d’autres sites (5810)

  • Trying to crop an image in ffmpeg using alphamerge but produces wrong alpha

    12 septembre 2021, par Alex Styl

    I am using alphamerge in order to crop an image within a circle.

    


    What I have so far is :

    


    ffmpeg -f lavfi -i "color=c=white:size=240x240" -i avatar.png -i mask.png -filter_complex \
 "[1][2]alphamerge[img]; \
 [0][img]overlay[out]" -c:v png -map "[out]" -pix_fmt rgba -t 5 -y out.mp4 2>&1


    


    with avatar.png and mask.png respectively being :

    


    avatar mask

    


    This produces the following output (1 frame of the output video) :

    


    enter image description here

    


    which is unexpected, given the original input is much darker than this.

    


    How can I crop the 'avatar.png' using the 'mask.png' so that the output is the avatar.png cropped in a circle and keeping the same alpha ?

    


    PS : The important bit here is for me to be able to crop the original image and maintaining the correct colors/apha of the original image. If there is an other way of doing this (other than alphamerge) I am happy to hear it.

    


  • flac : Fix channel order for mono files.

    28 juin 2014, par Erik de Castro Lopo
    flac : Fix channel order for mono files.

    * The default channel mask for mono files was 0x0001 (front left) but it
    
  makes more sense to use 0x0004 (front center) for such files.
    

    * Also FLAC will accept not only mono WAV files with 0x0001 mask, but also
    
  with 0x0002 (requested at https://sourceforge.net/p/flac/bugs/390/)
    
  and 0x0004 (e.g. SoX creates mono files with this mask).
    

    * The comment about channel support was updated.
    

    * The error message
    
     "Use —channel-map=none option to store channels in current order ; FLAC files
    
     must also be decoded with —channel-map=none to restore correct order."
    
  is misleading : FLAC never changes the order of channels.
    
  Decoding with this options also sets the channel mask of the resulting WAV
    
  file to 0. Without this option the mask is equal to the value of
    
  WAVEFORMATEXTENSIBLE_CHANNEL_MASK tag.
    

    Patch-from : lvqcl <lvqcl.mail@gmail.com>
    • [DH] src/flac/decode.c
    • [DH] src/flac/encode.c

  • aarch64 : Use ret x instead of br x where possible

    28 septembre 2020, par Jonathan Wright
    aarch64 : Use ret x<n> instead of br x<n> where possible

    Change AArch64 assembly code to use :
    
  ret     x<n>
    
instead of :
    
  br      x<n>
    

    "ret x<n>" is already used in a lot of places so this patch makes it
    
consistent across the code base. This does not change behavior or
    
performance.
    

    In addition, this change reduces the number of landing pads needed in
    
a subsequent patch to support the Armv8.5-A Branch Target
    
Identification (BTI) security feature.
    

    Signed-off-by : Jonathan Wright <jonathan.wright@arm.com>
    
Signed-off-by : Martin Storsjö <martin@martin.st>
    • [DH] libavcodec/aarch64/simple_idct_neon.S
    • [DH] libavcodec/aarch64/vp9itxfm_16bpp_neon.S
    • [DH] libavcodec/aarch64/vp9itxfm_neon.S
    • [DH] libavcodec/aarch64/vp9lpf_16bpp_neon.S
    • [DH] libavcodec/aarch64/vp9lpf_neon.S

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