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  • Les tâches Cron régulières de la ferme

    1er décembre 2010, par

    La gestion de la ferme passe par l’exécution à intervalle régulier de plusieurs tâches répétitives dites Cron.
    Le super Cron (gestion_mutu_super_cron)
    Cette tâche, planifiée chaque minute, a pour simple effet d’appeler le Cron de l’ensemble des instances de la mutualisation régulièrement. Couplée avec un Cron système sur le site central de la mutualisation, cela permet de simplement générer des visites régulières sur les différents sites et éviter que les tâches des sites peu visités soient trop (...)

  • 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 (...)

  • List of compatible distributions

    26 avril 2011, par

    The table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
    If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...)

Sur d’autres sites (10456)

  • 2-pass rate control in HEVC encoder or x265

    6 mai 2021, par Alearner

    I want to use 2-pass rate control in the HEVC encoder reference code but I do not know if there is a configuration setting to do it. My goal is to encode an original sequence in the 1st-pass rate control and encode a filtered sequence of the original sequence in the 2nd-pass.

    


    I see this can be done in FFmpeg and x265, but giving two different input videos (original and filtered) to the encoder, does it still even make sense ? Any ideas on how to do it in the HEVC encoder/x265 or any comments would be appreciated.

    


  • rails / streamio-ffmpeg - How to execute 2-pass encoding ?

    20 mars 2017, par R4ttlesnake

    I’m using streamio-ffmpeg to encode videos uploaded to my Rails application via ffmpeg. I want to encode the videos to .webm-format using the VP9 coding format and the VP9 Encoding Guide of the WebM Project recommends using 2-pass encoding. I managed to get the videos encoding via streamio-ffmpeg using 1-pass encoding, but I can’t figure out how to handle the 2-pass encoding.

    Here my setup so far :

    # create two tempfiles for the video and a still
    
video = Tempfile.new(["video", ".webm"], binmode: true)
    
still = Tempfile.new(["still", ".jpg"], binmode: true)
    

    
# new FFMPEG
    
movie = FFMPEG::Movie.new(original.path)
    

    
# extract still from video
    
movie.screenshot(still.path)
    

    
# encode video
    
options = %w(-c:v libvpx-vp9 -b:v 1000K -threads 8 -speed 4 -tile-columns 6 -frame-parallel 1 -auto-alt-ref 1 -lag-in-frames 25 -c:a libvorbis -b:a 64k -f webm)
    
movie.transcode(video.path, options)

    The command to do a 2-pass encoding with ffmpeg would be :

    ffmpeg -i <source> -c:v libvpx-vp9 -pass 1 ... -f webm /dev/null
    
ffmpeg -i <source> -c:v libvpx-vp9 -pass 2 ... -f output.webm
    
</source></source>

    In particular, I don’t get how to pass the file of the first encoding step to the second step with streamio-ffmpeg. How would I apply these two steps to the syntax of movie.transcode(output, options) ?

    Thanks !

  • How to pass frame bitmap from ffmpeg to android ?

    2 juin 2014, par 4ntoine

    I have ported to android ffmpeg (via JNI) and working android app. How can i pass frame bitmap from native code to android (what ffmpeg function and how to pass bitmap though JNI) to make it OpenGL texture ?

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