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  • 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 (...)

  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • 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

Sur d’autres sites (13209)

  • mpegvideo : Expand macro

    10 juin 2015, par Vittorio Giovara
    mpegvideo : Expand macro

    Having this macro in an header only facilitates the use of such header.
    
The code increase is minimal and files have one less dependency
    
on mpegvideo.h.
    • [DBH] libavcodec/flvenc.c
    • [DBH] libavcodec/h261enc.c
    • [DBH] libavcodec/mpegvideo.h
    • [DBH] libavcodec/mpegvideo_enc.c
    • [DBH] libavcodec/rv10enc.c
    • [DBH] libavcodec/rv20enc.c

  • checkasm : use perf API on Linux ARM*

    1er septembre 2017, par Clément Bœsch
    checkasm : use perf API on Linux ARM*

    On ARM platforms, accessing the PMU registers requires special user
    
access permissions. Since there is no other way to get accurate timers,
    
the current implementation of timers in FFmpeg rely on these registers.
    
Unfortunately, enabling user access to these registers on Linux is not
    
trivial, and generally involve compiling a random and unreliable github
    
kernel module, or patching somehow your kernel.
    

    Such module is very unlikely to reach the upstream anytime soon. Quoting
    
Robin Murphin from ARM :
    

    > Say you do give userspace direct access to the PMU ; now run two or more
    
> programs at once that believe they can use the counters for their own
    
> "minimal-overhead" profiling. Have fun interpreting those results...
    
>
    
> And that's not even getting into the implications of scheduling across
    
> different CPUs, CPUidle, etc. where the PMU state is completely beyond
    
> userspace's control. In general, the plan to provide userspace with
    
> something which might happen to just about work in a few corner cases,
    
> but is meaningless, misleading or downright broken in all others, is to
    
> never do so.
    

    As a result, the alternative is to use the Performance Monitoring Linux
    
API which makes use of these registers internally (assuming the PMU of
    
your ARM board is supported in the kernel, which is definitely not a
    
given...).
    

    While the Linux API is obviously cross platform, it does have a
    
significant overhead which needs to be taken into account. As a result,
    
that mode is only weakly enabled on ARM platforms exclusively.
    

    Note on the non flexibility of the implementation : the timers (native
    
FFmpeg vs Linux API) are selected at compilation time to prevent the
    
need of function calls, which would result in a negative impact on the
    
cycle counters.
    • [DH] configure
    • [DH] tests/checkasm/checkasm.c
    • [DH] tests/checkasm/checkasm.h

  • How to generate a PDF (1.7) from a MP4 movie (Rich Media annotation) ?

    19 août 2020, par malat

    I am a happy user of img2pdf. This tool does the minimal amount of work to put a series of JPEG 2000/JPEG/PNG images into a PDF "enveloppe". However I am now faced with a new challenge : embed a MP4 file into a PDF "enveloppe".

    


    I see that commercial tool can do it, as seen at :

    


    


    It seems to have been introduced in ISO 32000-1 (PDF 1.7 Extension Level 5)

    


    I am looking for a solution which will use the Rich Media annotation inside the PDF stream.

    


    There are dozen of duplicated questions on superuser/stackoverflow, which all pretty much refer to imagemagick/convert command line tool. But in my case, convert expand the images into a multi-page PDF (which is not my desired behavior) :

    


    $ convert input.mp4 output.pdf
$ pdfinfo output.pdf 
Title:          out
Producer:       https://imagemagick.org
CreationDate:   Wed Aug 19 15:38:01 2020 CEST
ModDate:        Wed Aug 19 15:38:01 2020 CEST
Tagged:         no
UserProperties: no
Suspects:       no
Form:           none
JavaScript:     no
Pages:          1601
Encrypted:      no
Page size:      352 x 288 pts
Page rot:       0
File size:      534407296 bytes
Optimized:      no
PDF version:    1.3


    


    with :

    


    $ convert --version
Version: ImageMagick 6.9.10-23 Q16 x86_64 20190101 https://imagemagick.org
Copyright: © 1999-2019 ImageMagick Studio LLC
License: https://imagemagick.org/script/license.php
Features: Cipher DPC Modules OpenMP 
Delegates (built-in): bzlib djvu fftw fontconfig freetype jbig jng jpeg lcms lqr ltdl lzma openexr pangocairo png tiff webp wmf x xml zlib


    


    and

    


    $ file input.mp4 
input.mp4: ISO Media, MP4 Base Media v1 [IS0 14496-12:2003]
$ ffprobe -v quiet -print_format json  -show_streams input.mp4 | grep codec_long_name
            "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",


    


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