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Autres articles (53)

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

  • 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 ;

  • Ecrire une actualité

    21 juin 2013, par

    Présentez les changements dans votre MédiaSPIP ou les actualités de vos projets sur votre MédiaSPIP grâce à la rubrique actualités.
    Dans le thème par défaut spipeo de MédiaSPIP, les actualités sont affichées en bas de la page principale sous les éditoriaux.
    Vous pouvez personnaliser le formulaire de création d’une actualité.
    Formulaire de création d’une actualité Dans le cas d’un document de type actualité, les champs proposés par défaut sont : Date de publication ( personnaliser la date de publication ) (...)

Sur d’autres sites (6823)

  • ffmpeg : shift start time correction to ffmpeg_opt

    21 octobre 2022, par Gyan Doshi
    ffmpeg : shift start time correction to ffmpeg_opt

    In preparation for applying start time correction that accounts for all
    
factors such as copyts, input_ts_offset ..etc
    • [DH] fftools/ffmpeg.c
    • [DH] fftools/ffmpeg_opt.c

  • lavc/aacpsdsp : RISC-V V hybrid_analysis

    26 septembre 2022, par Rémi Denis-Courmont
    lavc/aacpsdsp : RISC-V V hybrid_analysis

    This starts with one-time initialisation of the 26 constant factors
    
like  08edacc248bce3f8946d75e97188d189c74a6de6. That is done with
    
the scalar instruction set. While the formula can readily be vectored,
    
the gains would (probably) be more than lost in transfering the results
    
back to FP registers (or suitably reshuffling them into vector
    
registers).
    

    Note that the main loop could likely be scheduled sligthly better by
    
expanding the filter macro and interleaving loads with arithmetic.
    
It is not clear yet if that would be relevant for vector processing (as
    
opposed to traditional SIMD).
    

    We could also use fewer vectors, but there is not much point in sparing
    
them (they are *all* callee-clobbered).
    • [DH] libavcodec/riscv/aacpsdsp_init.c
    • [DH] libavcodec/riscv/aacpsdsp_rvv.S

  • Disadvantages to creating/removing many hard links ?

    6 novembre 2011, par agartland

    I need to create hundreds to thousands of temporary hard or symbolic links that will be deleted shortly after creation. For my purposes both types of links will work (i.e. the target is not a directory and it always exists on the same file system)

    As I understand it, symbolic links create a small file that contains the path to the original file. Whereas a hardlink creates a reference to the data in the same inode. So maybe if I am going to be creating/deleting thousands of these links is it better to be creating and deleting thousands of tiny files (symlinks) or thousands of these references (hardlinks) ? It seems like one taxes the hard drive (maybe fragmentation) while the other might tax the file system itself ? Where are inode references stored. Do I risk corrupting the file system by making so many hard links ? What about speed ?

    Thanks for your expertise !

    This a work around to be able to use ffmpeg to encode a movie out of an arbitrary subset of images from a directory. Since ffmpeg requires that the files be named properly (e.g. frame%04d.jpg) I realized I can just create hard/sym links to the subset of files and just name the links appropriately. This avoids renaming the original files and having to actually copy the data. It works great but it requires creating and deleting many thousands of links, repeatedly.

    Sort of addresses this problem too I believe :
    convert image sequence using ffmpeg

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