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  • 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

  • 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 (6270)

  • FFMPEG : cut clips from a long video with "fast seek" while maintaining accuracy

    15 août 2020, par japseow

    I have this 3 hour long video which consists of <1-5 seconds of black frames> — < clip > — <1-5 seconds of black frames> — < clip > — ...

    &#xA;

    I could successfully get the clip without the black frames with the slow seek, but it takes over 4 minutes just for seeking.

    &#xA;

    ffmpeg -y -i "C:\Users\user\Videos\obs\part1.mp4" -ss 4370.48 -to 4384.95 -c:a copy -c:v hevc_nvenc -rc vbr_hq -cq 19 -b:v 10000k -maxrate:v 12500k "C:\Users\user\Videos\obs\____delete1.mp4"

    &#xA;

    I tried using the fast seek which takes only 4 sec, but it includes a 4 sec blackframe chunk at the end of the video. The output that should've been 14 sec long became 18 sec.

    &#xA;

    ffmpeg -y -ss 4370.48 -i "C:\Users\user\Videos\obs\part1.mp4" -to 14.47 -c:a copy -c:v hevc_nvenc -rc vbr_hq -cq 19 -b:v 10000k -maxrate:v 12500k "C:\Users\user\Videos\obs\____delete2.mp4"

    &#xA;

    My video has around 640 clips so it's impractical to wait that long just for seeking, and it'll only get worse when I'll be seeking at around the 2+ hour mark.

    &#xA;

  • FFmpeg : How to convert horizontal video 16:9 to vertical video 9:16, with blurred background on top and bottom sides

    13 janvier 2016, par gomezo

    I know there is a post to do the contrary :
    FFmpeg : How to convert vertical video with black sides, to video 16:9, with blurred background sides

    but i can’t figure out how to do this with ffmpeg

    here is the input :

    and here is the expected result (the background video should be zoomed with the same aspect ratio, cropped to 9/16 and blurred) :

    Thanks for your help !

  • Filter the video while keeping the bitrate (FFmpeg) [migrated]

    20 décembre 2013, par Timofey

    For experimental purposes, I need to filter my video (using -vf option) and change, say, brightness, but keep the same bitrate as in original video.

    Just for testing purposes, I change RGB values to make video completely black using line like this :

    ffmpeg -i input.mp4 -vf lutrgb=&#39;r=0.0*val:g=0.0*val:b=0.0*val&#39; output.mp4

    So far, I tried to specify bitrate manually by adding -b, -minrate/maxrate and -q options to this line, but no matter what I do, FFmpeg keep reducing the br of the output video to just a few kilobytes.

    And my question is - if it's possible to keep bitrate on the same level even if if I change RGB values to be completely black (as an extreme case).

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