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Autres articles (35)

  • Supporting all media types

    13 avril 2011, par

    Unlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)

  • 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 (...)

  • De l’upload à la vidéo finale [version standalone]

    31 janvier 2010, par

    Le chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
    Upload et récupération d’informations de la vidéo source
    Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
    Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier ; La génération d’une vignette : extraction d’une (...)

Sur d’autres sites (5225)

  • lowpass filter Q factor online simulator (bode plot)

    5 novembre 2016, par user1320370

    I like to add a low pass filter on a audio file myfile.flac with ffmpeg.

    The parameters to choose are the frequency and Q-factor or slope.

    ffmpeg -i myfile.flac -af "highpass=f=9000:width_type=q:width=0.707" output.flac

    The default q-factor is 0.707.

    I like to increase the q-factor but a too high value can cause excessive resonance.

    For this reason before do it can be useful to test with a bode plot simular (online if exist) that can accept filter type (lowpass, highpass) , frequency and Q-factor.

    Someone can please send a link of a bode plot that show a simulator like this ?

    thank you !!

  • Is it possible to replace a moving transparent area inside video with a image

    6 octobre 2016, par somya bhargava

    Have a video with moving transparent rectangle want to put up a image in that particular area is it possible using ffmpeg or need to split into frames and do the needful

  • FFmpeg sws_scale on changed area

    1er octobre 2016, par useprxf

    I was using sws_scale to convert a group of RGB32 images to YUV420 format. Each image is very similar to the previous one and they only differ on a rectangle region Q.

    My question is how to utilize Q to speed up the conversion process ? An additional parameter should be added to sws_scale function.

    sws_scale( ctx, in_plane, in_stride, sliceY, height, out_plane, out_stride, Q){
    
    // parameter out_plane stores the YUV420 data of previous image
    
    Instead of scanning the whole image, scan through rectangle Q{
    
        Do conversion
    
    }
    
}

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