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Autres articles (96)

  • 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

  • Que fait exactement ce script ?

    18 janvier 2011, par

    Ce script est écrit en bash. Il est donc facilement utilisable sur n’importe quel serveur.
    Il n’est compatible qu’avec une liste de distributions précises (voir Liste des distributions compatibles).
    Installation de dépendances de MediaSPIP
    Son rôle principal est d’installer l’ensemble des dépendances logicielles nécessaires coté serveur à savoir :
    Les outils de base pour pouvoir installer le reste des dépendances Les outils de développements : build-essential (via APT depuis les dépôts officiels) ; (...)

  • Contribute to a better visual interface

    13 avril 2011

    MediaSPIP is based on a system of themes and templates. Templates define the placement of information on the page, and can be adapted to a wide range of uses. Themes define the overall graphic appearance of the site.
    Anyone can submit a new graphic theme or template and make it available to the MediaSPIP community.

Sur d’autres sites (5511)

  • avfilter/vf_histogram : make it possible to pick color components for levels mode

    19 août 2015, par Paul B Mahol
    avfilter/vf_histogram : make it possible to pick color components for levels mode

    Signed-off-by : Paul B Mahol <onemda@gmail.com>
    • [DH] doc/filters.texi
    • [DH] libavfilter/vf_histogram.c

  • ffplay + color-grading filter settings : live-adjust filter settings while playback ?

    5 octobre 2019, par raven

    following up on a previous topic, a color-grading ffmpeg M$ batch script which you guys have brillantly helped me to set up (link : ffmpeg - color-grading video material AND display original source as picture-in-picture, using -filter_complex), I now have another daring question for you :))

    The script renders one input video file and displays the original (non-graded) source material as a PIP overlay (lower-right corner), based on some pre-defined filter settings. These filter settings are hard-coded (M$ batch file). This works really nice, and I am quite happy with it, thanks again to the helping hands of the contributors !

    Could this now be taken one step further, i.e., having the filter parameters dynamically changing during playback ? Being able to adjust color-grading parameters on-the-fly, during playback, would certainly help to quicker find the correct color grading values for later rendering, using the aforementioned script.

    Maybe one has to ditch the PIP for this. So, let’s go playback only (no PIP encoding) and use ffplay, with some adjustable filter settings while playing the video material. Is such a dynamic filter adjustment even possible with ffplay, during video playback ?

    I’ll remain curious, and would like to thank you guys in advance for your time and support ! Cheers, raven.

  • ffmpeg converting mp4 to gif with color palette results in truncated video

    6 décembre 2019, par Tik0

    I want to generate a gif from my mp4 movie with ffmpeg (ffmpeg version 2.8.15-0ubuntu0.16.04.1) using a color palette. Everything works fine if I do not use a palette :

    $ ffmpeg -i in.mp4 -filter_complex "scale=160:-1" out.gif
    
...
    
frame= 2003 fps=251 q=-0.0 Lsize=   21172kB time=00:01:20.12 bitrate=2164.7kbits/s    
    
video:21155kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.077667%

    But using a palette like so results in Buffer queue overflow, dropping messages and a truncated video

    $ ffmpeg -i in.mp4 -filter_complex "[0:v] scale=160:-1, split [a][b];[a] palettegen [p];[b][p] paletteuse" out.gif
    
....
    
[Parsed_paletteuse_3 @ 0xc56de0] [framesync @ 0xd1af08] Buffer queue overflow, dropping.
    
Last message repeated 36 times
    
[Parsed_paletteuse_3 @ 0xc56de0] [framesync @ 0xd1af08] Buffer queue overflow, dropping.
    
Last message repeated 106 times
    
...
    
[Parsed_palettegen_2 @ 0xc56d40] 255(+1) colors generated out of 1347441 colors; ratio=0.000189
    
frame=   65 fps=5.4 q=-0.0 Lsize=    1036kB time=00:01:20.12 bitrate= 105.9kbits/s    
    
video:1035kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.124664%

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