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  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • 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 (...)

  • Librairies et binaires spécifiques au traitement vidéo et sonore

    31 janvier 2010, par

    Les logiciels et librairies suivantes sont utilisées par SPIPmotion d’une manière ou d’une autre.
    Binaires obligatoires FFMpeg : encodeur principal, permet de transcoder presque tous les types de fichiers vidéo et sonores dans les formats lisibles sur Internet. CF ce tutoriel pour son installation ; Oggz-tools : outils d’inspection de fichiers ogg ; Mediainfo : récupération d’informations depuis la plupart des formats vidéos et sonores ;
    Binaires complémentaires et facultatifs flvtool2 : (...)

Sur d’autres sites (9265)

  • advanced ffmpeg compression controll

    27 décembre 2015, par Daniel Mahler

    I am using very aggressive video compression, eg -crf 51. I am using this for ’artistic’ effect, so what I am doing may not make sense from a normal video compression point of view.

    So far I have only been using very basic compression control using only the -crf or -b:v flags. The results look like ffmpeg divides images into square patches and the makes smooth approximations within the patches. This gives 2 control dimensions to the process : the patch size and the aggressiveness of the smoothing within the patches.

    It have found that ffmpeg uses both parameters to some extent, but there appears to be an absolute maximum patch size in pixels beyond which it will not go regardless of the frame size.
    After that it will only increase compression by reducing the detail within the patches.

    This is suboptimal for high resolution video, where this becomes equivalent to reducing the resolution. The problem is particularly noticeable on fractal like images which have large featureless region as well as regions of high detail.

    How can I tell ffmpeg to increase the maximum patch size and retain more detail within the patches ?

  • Change volume in only one of the audio channels with FFMPEG

    13 avril 2017, par Nadir

    I need, in an android application using FFmpeg, to separately adjust the volume of an mp3 file setting two different values for the two channels.
    This is the command I’m executing :

    [-i, 0.mp3, -filter_complex, channelsplit[lpre][rpre];[lpre]volume=0.0[l];
    
[rpre]volume=1.0[r];[l][r]amix=inputs=2, 0.wav]

    In this case for example I’d expect the output to have a mute left channel and the right channel as normal. The result is instead a wave with the same volume on both channels.

  • Compression in Android taking long time

    24 avril 2017, par NSR

    I am new to Video related operations. I am using [FFMPEG][1] to compress a video in my Android application.

    I am trying to compress a video of 50MB to 10MB by executing following command

    ffmpeg -y -i /videos/in.mp4 -strict experimental -s 640x480 -r 25 -vcodec mpeg4 -b 150k -ab 48000 -ac 2 -ar 22050 /videos/out.mp4

    Video compressing successfully, but it taking more than 150 seconds. I am unable find out how to reduce that time.

    I want to change this command to complete this process in less time.

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