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Autres articles (110)

  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
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    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
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    5 mars 2010, par

    Le site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)

Sur d’autres sites (10276)

  • Ghosting in colour channels

    24 mai 2024, par Blikpils

    This seems like a very specific question so i hope there is someone who can help me out.
Within FFMPEG i am trying to add (channel pack) 3 different grayscale videos in RGB within a webm or mp4 video. I got it to work to a degree via Merge planes.
This is what i tried :

    


    ffmpeg -y -i video1.webm -i video2.webm -i video3.webm -filter_complex "[0:v]format=gray[r]; [1:v]format=gray[g]; [2:v]format=gray[b]; [g][b][r]mergeplanes=0x001020:format=gbrp" -pix_fmt yuv420p -t 00:00:03 output.webm


    


    This is the result :
enter image description here

    


    As you see the 9 is visible in the red and blue channel and so are each of the other channels

    


    I have tried just extracting a single channel in a video, change the compression change the format change the color space, make sure that its all linear but each seem to have the limitation of some smearing/artifacts between the other channels.

    


    Is it at all possible to add different grayscale streams in the color channels without any artifacts and if so in which direction should i look ?

    


    Any help would be greatly appreciated !

    


  • How to change colour in WebM video using FFMPEG

    21 septembre 2020, par gowtham kosaraju

    I Have a web video file in this want to change the colour of the video pixels which are in black to blue color. I tried with the below command.

    


    Input video :
https://share.getcloudapp.com/WnuJoLGX

    


    ffmpeg -vcodec libvpx-vp9 -i input.webm -filter_complex "[0:v]format=rgba,lutrgb=r='if(eq(val,0),240,val)':g='if(eq(val,0),111,val)':b='if(eq(val,0),69,val)':a='val'[out]" -vcodec libvpx-vp9 -map "[out]" output.webm


    


    Output video : https://share.getcloudapp.com/geuzn6be

    


    But output video looks stuttering at the edges. Can anyone guide me on how to make video smoother ?

    


  • ffmpeg Ghosting between RGB color channels [closed]

    24 mai 2024, par Blikpils

    This seems like a very specific question so i hope there is someone who can help me out.
Within FFMPEG i am trying to add (channel pack) 3 different grayscale videos in RGB within a webm or mp4 video. I got it to work to a degree via Merge planes.
This is what i tried :

    


    ffmpeg -y -i video1.webm -i video2.webm -i video3.webm -filter_complex "[0:v]format=gray[r]; [1:v]format=gray[g]; [2:v]format=gray[b]; [g][b][r]mergeplanes=0x001020:format=gbrp" -pix_fmt yuv420p -t 00:00:03 output.webm


    


    This is the result :
enter image description here

    


    As you see the 9 is visible in the red and blue channel and so are each of the other channels

    


    I have tried just extracting a single channel in a video, change the compression change the format change the color space, make sure that its all linear but each seem to have the limitation of some smearing/artifacts between the other channels.

    


    Is it at all possible to add different grayscale streams in the color channels without any artifacts and if so in which direction should i look ?

    


    Any help would be greatly appreciated !

    


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