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Autres articles (47)

  • 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

  • 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 (...)

Sur d’autres sites (10931)

  • C# FFmpeg / NReco.VideoConverter : Increase Conversion Speed

    16 septembre 2015, par Chaki_Black

    I use NReco.VideoConverter for video conversion.
    How can I increase video conversion speed and get a maximum performance ?
    Theory says, that it is possible to increase video conversion :

    • rise processor cores quantity ;
    • rise CPU frequency (set more powerful processor(s)) ;
    • set outer video adapter to use GPU.

    There several questions :

    • can FFmpeg / NReco.VideoConverter use several cores/processor(s) at
      once and how ?
    • can FFmpeg / NReco.VideoConverter use GPU or it depends from video
      codec installed in OS ?

    What factors can influence on conversion process ?

  • FFMPEG improve MP4 encoding speed [on hold]

    17 septembre 2015, par Kim T

    My input files are MP4, which are combined with an overlay to one MP4 video file. How can I improve the speed of these FFMPEG commands ?

    ./ffmpeg -y -i intro.mp4 -f mpegts 0.ts
    
./ffmpeg -y -i record.mp4 -i overlay.png -filter_complex "[0:v][1:v] overlay=0:0" -ac 2 -f mpegts 1.ts
    
./ffmpeg -y -i outro.mp4 -f mpegts 2.ts
    
./ffmpeg -y -i "concat:0.ts|1.ts|2.ts" -vcodec libx264 -preset ultrafast -strict -2 output.mp4

    Commands that improved speed :

    • upgrading ffmpeg to version 2.42 with neon support for my device
    • -f mpegts = converts videos to transport streams which process faster
    • -preset ultrafast = tells encoder to use fastest encoding preset
    • -ss before -i = seeks straight to start point without processing frames

    Commands where I saw no speed improvement :

    • -c copy = copies the stream, but this doesn’t seem to work on overlay filters and concats :(
    • -threads 2 = tells FFMPEG to use more threads, but don’t noticed an improvement over the default

  • aviflter/vf_waveform : speed up non-color filters

    10 novembre 2015, par Paul B Mahol
    aviflter/vf_waveform : speed up non-color filters

    Remove loops, output is also more interesting.
    

    Signed-off-by : Paul B Mahol <onemda@gmail.com>
    • [DH] libavfilter/vf_waveform.c

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