Recherche avancée

Médias (91)

Autres articles (64)

  • Des sites réalisés avec MediaSPIP

    2 mai 2011, par

    Cette page présente quelques-uns des sites fonctionnant sous MediaSPIP.
    Vous pouvez bien entendu ajouter le votre grâce au formulaire en bas de page.

  • Participer à sa traduction

    10 avril 2011

    Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
    Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
    Actuellement MediaSPIP n’est disponible qu’en français et (...)

  • 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 (...)

Sur d’autres sites (12237)

  • Creating a transparent video out of an input video

    28 juillet 2021, par poldown

    I'm trying to create a video with a transparent background out of an input video (with the same dimensions, etc.). I tried several strategies (using the chromakey filter and others) and none worked... I got this far :

    


    ffmpeg -i input.mp4 -filter_complex "color=color=black@0.0,format=yuva420p[bg],[bg][0:v]scale2ref[bg][0v],[bg]drawbox=x=10:y=10:w=100:h=100:color=pink@0.5;[0v]nullsink" -c:v qtrle -an "alpha.mov"


    


      

    • creating a video stream with transparency, and setting a transparent background (black@0.0)

      • 


    • scaling the transparent video according to the input video

      • 


    • [for testing purposes : drawing a box over the transparent video. I omitted the part in which I embed subtitles onto the video, for simplicity's sake]

      • 


    • discarding the input video stream

      • 


    • removing the audio stream

      • 


    


    It basically works, but the processing never ends - I can't manage to limit the output video length so it'll match the input video's length...
I've tried using the -shortest option anywhere in the command - with no success.

    


  • Give a video rounded transparent edges so that it can be overlayed on another video using FFMPEG

    15 octobre 2020, par Kevin Jasti

    Im trying to overlay a smaller video (200x200)on top of a bigger video (800x800).

    



    I've used the FFMPEG overlay filter to achieve this

    



        ffmpeg -i big.mp4 -vf "movie=small.mkv[clip2]; [in][clip2] overlay=1:5 [out]"  final.mp4


    



    Challenge is that the smaller video needs its edges to be rounded.
I have tried working with alphaextract and alphamerge. The documentation on FFMPEG is sparse and im not sure how to go about it.

    


  • Give a video rounded transparent edges so that it can be overlayed on another video using FFMPEG

    30 septembre 2015, par Kevin Jasti

    Im trying to overlay a smaller video (200x200)on top of a bigger video (800x800).

    I’ve used the FFMPEG overlay filter to achieve this

        ffmpeg -i big.mp4 -vf "movie=small.mkv[clip2]; [in][clip2] overlay=1:5 [out]"  final.mp4

    Challenge is that the smaller video needs its edges to be rounded.
    I have tried working with alphaextract and alphamerge. The documentation on FFMPEG is sparse and im not sure how to go about it.

Navigation