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  • Mise à jour de la version 0.1 vers 0.2

    24 juin 2013, par

    Explications des différents changements notables lors du passage de la version 0.1 de MediaSPIP à la version 0.3. Quelles sont les nouveautés
    Au niveau des dépendances logicielles Utilisation des dernières versions de FFMpeg (>= v1.2.1) ; Installation des dépendances pour Smush ; Installation de MediaInfo et FFprobe pour la récupération des métadonnées ; On n’utilise plus ffmpeg2theora ; On n’installe plus flvtool2 au profit de flvtool++ ; On n’installe plus ffmpeg-php qui n’est plus maintenu au (...)

  • 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 ;

  • 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

Sur d’autres sites (11763)

  • avcodec/x86/h264_idct : Fix incorrect xmm spilling on win64

    24 mars 2024, par Henrik Gramner
    avcodec/x86/h264_idct : Fix incorrect xmm spilling on win64

    Broken in afa471d0efed1df5dca6eeeb2fcdd211ae4cad4e. It just happened
    
to work before due to x86inc.asm previously performing XMM spills in
    
INIT_MMX mode which was more of a bug than an intentional feature.
    • [DH] libavcodec/x86/h264_idct.asm

  • Convert SDR-JPEG to HDR-AVIF [closed]

    27 avril 2024, par Jonas Janzen

    I would like to convert a jpg file into an avif file that is to be saved in HDR10-capable metadata (PQ curve, 2020 color space, 10 bit).

    


    The idea is to save normal SDR images in HDR-capable containers so that they can be displayed in all their glory on HDR-capable displays.

    


    I want to play with inverse tone mapping, to manipulate the output, so I implemented in Python via subprocess.

    


    So far I just want the input image to be saved in AVIF as HDR and look the same at the end as before, so that I can then make changes in the next step.

    


    I used the following command for this :

    


    ffmpeg_command = [
'ffmpeg',

    


    Input File
'-i', temp_file,

    


    Used Library
'-c', 'libaom-av1',

    


    '-still-picture', '1',

    


    Output Metadata
'-pix_fmt', 'yuv420p10le',
'-strict', 'experimental',
'-color_primaries', 'bt2020',
'-color_trc', 'smpte2084',
'-colorspace', 'bt2020nc',
'-color_range', 'pc',

    


    Output File
output_file
]

    


    So far my attempts have only been successful with the HLG characteristic. Here you can see that the images are really brighter in the peaks on my HDR monitor.

    


    With the PQ characteristic curve, the images are far too oversaturated.

    


    I guess this is because the HLG curve is compatible with the gamma curve, but PQ is not.

    


    Now my question is what I need to change.

    


    Which curve does FFMpeg expect as input.

    


    In Python I can change the images mathematically without any problems.

    


    The Example Images are again tone mapped down to jpg, to show what happened.

    


    enter image description here
enter image description here

    


  • Revert "avcodec : Rename ff_kbd_window_init() as it will be needed from outside libavc...

    28 janvier 2024, par Andreas Rheinhardt
    Revert "avcodec : Rename ff_kbd_window_init() as it will be needed from outside libavcodec"

    This reverts commits fd5aa93a37b3fa21195c6d7b22ef655124020e09
    
and cf00f60bab1f79213c274a6cd4357b32bd5c0101
    
("avcodec/kbdwin : Support arbitrary sized windows").
    

    The change in question has only been made for libavradio.
    
in anticipation of merging it into the main tree. This has
    
not happened, so this commit reverts the changes to kbdwin
    
that are not used for anything else. In particular, these
    
functions are no longer exported (as avpriv functions) ;
    
notice that the fixed-point function has been exported
    
despite having never been used outside of lavc.
    

    Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
    • [DH] libavcodec/aacdec_template.c
    • [DH] libavcodec/aactab.c
    • [DH] libavcodec/ac3dec.c
    • [DH] libavcodec/ac3enc_fixed.c
    • [DH] libavcodec/ac3enc_float.c
    • [DH] libavcodec/dolby_e.c
    • [DH] libavcodec/kbdwin.c
    • [DH] libavcodec/kbdwin.h

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