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Autres articles (41)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

  • Other interesting software

    13 avril 2011, par

    We don’t claim to be the only ones doing what we do ... and especially not to assert claims to be the best either ... What we do, we just try to do it well and getting better ...
    The following list represents softwares that tend to be more or less as MediaSPIP or that MediaSPIP tries more or less to do the same, whatever ...
    We don’t know them, we didn’t try them, but you can take a peek.
    Videopress
    Website : http://videopress.com/
    License : GNU/GPL v2
    Source code : (...)

Sur d’autres sites (6508)

  • Merge commit ’599fe93a840397f551d94db406d0bad42b46b94b’

    8 septembre 2015, par Hendrik Leppkes
    Merge commit ’599fe93a840397f551d94db406d0bad42b46b94b’

    * commit ’599fe93a840397f551d94db406d0bad42b46b94b’ :
    
  riff : Add AVj2 fourcc for Avid jpeg2000
    

    Merged-by : Hendrik Leppkes <h.leppkes@gmail.com>
    • [DH] libavformat/riff.c

  • How to leverage NativeClients ports in new applications ?

    8 septembre 2015, par user1634494

    The specific NaCl port I would like to leverage in my NaCl project is ffmpeg. I know that the port exists and I can download the port from here
    but how do I actually use it.

    I have used ffmpeg in its normal command line setting, but I do not even know where to begin if I want to use it in a native client application. I have searched everywhere and there does not seem to be any information on how to do so.

    Any help on getting ffmpeg running with native client would be greatly appreciated.

  • Do FFMPEG H264 compression presets affect the video quality ? [closed]

    14 novembre 2013, par angainor

    I am definitely not an FFMPEG expert, but according to this document :

    A preset is a collection of options that will provide a certain encoding speed to compression ratio. A slower preset will provide better compression (compression is quality per filesize). General usage is to use the slowest preset that you have patience for. Current presets in descending order of speed are : ultrafast, superfast, veryfast, faster, fast, medium, slow, slower, veryslow, placebo.

    So as I understand it, the ffmpeg presets should not affect the quality of the output video, but should only determine the compression ratio / output file size. Consequently, assuming the same quality setting (I will use -crf 24), the files should be larger for e.g., faster preset than for the slower preset. That would be the only reason to use a slower preset - to get a smaller file size.

    This turns out not to be the case. I encode a HD stream from a handycam using different presets, everything else is the same :

    ffmpeg -y -i "$fname" -vf yadif=1,scale=-1:720 -acodec aac -ab 128k -ac 2 -strict experimental -vcodec libx264 -vpre slow -threads 2 -crf 24 "$outp"

    Surprisingly, I get the smallest file size for veryfast preset ! For example :

    • slower : output bitrate 3500kbps, encoding speed 17 fps, file size 29MB
    • veryfast : output bitrate 3050kbps, encoding speed 34 fps, file size 25MB

    Which I think is not as it should be. Now I wonder, is that due to a worse encoding quality for the veryfast preset ? Or in my case using slower does simply not make sense for some reason ?

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