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  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Ajouter des informations spécifiques aux utilisateurs et autres modifications de comportement liées aux auteurs

    12 avril 2011, par

    La manière la plus simple d’ajouter des informations aux auteurs est d’installer le plugin Inscription3. Il permet également de modifier certains comportements liés aux utilisateurs (référez-vous à sa documentation pour plus d’informations).
    Il est également possible d’ajouter des champs aux auteurs en installant les plugins champs extras 2 et Interface pour champs extras.

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

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  • How to Replace Duplicate Frames in a Video with Black Frames using ffmpeg ?

    21 mars 2021, par Yam Shargil

    I'm trying to trim all "no action, no movement" frames out of my screen recording. Some of my screen recordings are really long (like 100 hours long).

    


    I found this :
How to Simply Remove Duplicate Frames from a Video using ffmpeg

    


    ffmpeg -i in.mp4 -vf
"select='if(gt(scene,0.01),st(1,t),lte(t-ld(1),1))',setpts=N/FRAME_RATE/TB"
trimmed.mp4


    


    I don't want to lose any important frames, so for testing the threshold purposes, I want to replace (not remove) all the "no action" frames with black frames.

    


    That's my best shot so far, not my proudest work :

    


    ffmpeg -i in.mp4 -vf "select='if(gt(scene,0.01),st(1,t),lte(t-ld(1),1))',drawbox=color=black:t=fill" out.mp4


    


  • how to generate frames using ffmpeg `select` filter with custom function

    14 février 2023, par Ricky

    I got a video, and want to generate some frames to be my video cover candidates which should satisfied with some conditions below :

    


      

    1. frame in vary scenes.

      2. 


    2. frame contain person with good look, no eyes closed and etc.

      3. 


    


    I found ffmpeg select filter abilities, like

    


    ffmpeg -i input.mp4 -vf "select=gt(scene\,0.4)" -frames:v 5 -vsync vfr frames-diff-%02d.png


    


    can generate frames that have more than 40% scene change compared to the previous frames.

    


    I just found that only built-in select expressions support and no customization support.

    


      

    1. Does ffmpeg support external function/api/local command/script to give a frame select evaluation ?

      2. 


    2. Is there any other solutions to complete my goal ?

      3. 


    


    Thanks.

    


  • ffmpeg : sliding overlay for filter comparison

    8 octobre 2020, par cduguet

    I am trying to get the effect demonstrated in this video : https://www.youtube.com/watch?v=xrMZSLb_gPs

    


    Most of the sliding overlay solutions I've seen are for a sliding fixed image, but not for a progressive crop of each part of the video.

    


    I've tried doing :

    


    ffmpeg -i video1.mp4 -i video2.mp4 \
 -filter_complex "[0]crop='min(iw*(1+n)/100,iw)':ih:0:0[left];[1]crop='max((1-n/100)*iw,1)':ih:1-'max((1-n/100)*iw,1)':0[right];[left][right]hstack[out]" -map '[out]' -y out.mp4


    


    But it still does not work. Is there a way ?

    


    Thank you !

    


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