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Autres articles (43)

  • Gestion générale des documents

    13 mai 2011, par

    MédiaSPIP ne modifie jamais le document original mis en ligne.
    Pour chaque document mis en ligne il effectue deux opérations successives : la création d’une version supplémentaire qui peut être facilement consultée en ligne tout en laissant l’original téléchargeable dans le cas où le document original ne peut être lu dans un navigateur Internet ; la récupération des métadonnées du document original pour illustrer textuellement le fichier ;
    Les tableaux ci-dessous expliquent ce que peut faire MédiaSPIP (...)

  • 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.

  • 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.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

Sur d’autres sites (5920)

  • How to overlay/downmix two AMR speech files using ffmpeg (with SID mode)

    19 novembre 2019, par Tarrakis

    I have two AMR audio files, extracted from a SIP stream (VoIP call), one file for each person in the conversation.
    The audio files can be played independently using VLC, but it is clear that the SID (Silence Indicator) is being ignored, since one file has a considerably longer playback time than the other.

    I have tried merging them using FFmpeg, as indicated in this post, but I get the following error messages :
    "SID mode is not implemented." "Error while decoding stream #1:0 : Not yet implemented in FFmpeg"

    Does anyone know of an alternative for merging AMR audio files that could support SID mode ?
    Thanks.

  • ffmpeg select() filter conditionally [closed]

    18 août 2023, par Tomasz Plonka

    I am trying to generate thumbnail strip image from a video file ; the number of thumbnails is constant. So I generate timestamps, dividing the video length by a number of frames, seeking for the frame using -ss option and extracting a frame using 'select='eq(pict_type\,I) filter to get a clear snapshot (this is a quite fast method). There is a problem at the end of a video, however : usually two or three last frames are simply not intraframes, so ffmpeg does not extract anything. Is there a way to write select() filter conditionally, i.e. something like "select intraframe if it exists, otherwise get any frame from at a time provided" ?

    


  • Blur HD-video to make less artefacts when scaled down

    25 juin 2020, par Werner

    I'm enconding a video in HD-size adding a watermark, the source being 4K. The source-video seems to be very "sharp" and "clear".

    


    My problem is that when the HD-video is displayed in a small window in the browser or in VLC, I get a lot of artefacts, even sometimes noisy. My idea was to blur the video just a bit to keep the good quality but to reduce the artefacts.

    


    I'm encoding the video with ffmpeg on windows like :

    


    ffmpeg -i "source.mov" -i "watermark.png" -filter_complex "overlay=24:960,boxblur=1:1:cr=0:ar=0" -y "dest.mp4"


    


    The boxblur results already in a good video, but I was wondering if I can get a better solution by using other parameters on boxblur or using another blur-filter at all. But before trying things I must admit I don't fully understand perhaps somebody got some hints what would be a good place to start ?

    


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