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Autres articles (104)

  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

  • Soumettre améliorations et plugins supplémentaires

    10 avril 2011

    Si vous avez développé une nouvelle extension permettant d’ajouter une ou plusieurs fonctionnalités utiles à MediaSPIP, faites le nous savoir et son intégration dans la distribution officielle sera envisagée.
    Vous pouvez utiliser la liste de discussion de développement afin de le faire savoir ou demander de l’aide quant à la réalisation de ce plugin. MediaSPIP étant basé sur SPIP, il est également possible d’utiliser le liste de discussion SPIP-zone de SPIP pour (...)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

Sur d’autres sites (10667)

  • src/flac/decode.c : Decode WAVEFORMATEXTENSIBLE_CHANNEL_MASK.

    27 avril 2014, par Erik de Castro Lopo
    src/flac/decode.c : Decode WAVEFORMATEXTENSIBLE_CHANNEL_MASK.

    When decoding, read the contents of the WAVEFORMATEXTENSIBLE_CHANNEL_MASK
    
tag and write write the channel mask to the WAV file.
    

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

  • Converting alpha channel of PNG sequence to Y channel of H265

    31 mai 2018, par Krumelur

    I have a video renderer that expects two H265 streams (YUV420) and I need to bake them to have one of them form an alpha mask to the other one. This is all solved and works well, however if I follow the instructions here :
    ffmpeg splitting RGB and Alpha channels using filter
    the alpha channel is slighly off. My hypothesis is that this is due to the alpha channel being scaled through the RGB->YUV matrix.

    The input is a sequence of PNG files, the output is two MKV files.

    The question is then : How can I tell FFmpeg to “reinterpret” the alpha channel as the Y channel without touching the pixel data ? Ideally by producing both MKV:s in one command line as shown in the other question, but at least without rewriting the source files.

  • (FFMPEG) Make areas transparent before overlaying a vid with perspective

    3 août 2016, par aaeim

    I’m trying to add perspective to a small video then overlay it on top of an other.

    So far I can make the video small, add perspective to it and overlay it to an other video. but after applying the perspective filter, the excess areas don’t turn transparent, they just stretch out the pixels.

    the perspective filter doesn’t have much documentation but as far as i could find out there was no way of setting the extra pixels to transparent.

    So I’m guessing ill need to apply some kind of alpha mask, to the desired area ?

    this is the command I’m using for perspective :

    ffmpeg -i /synced_folder/testvid.mp4 -vf perspective=0:0:W:H/4:0:H:W:3*H/4:0:1:0 /synced_folder/output5.mp4

    Don’t think it matters but I’m running ffmpeg on a VM with centOS.

    This is a SS of how the result looks like :

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