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  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Automated installation script of MediaSPIP

    25 avril 2011, par

    To overcome the difficulties mainly due to the installation of server side software dependencies, an "all-in-one" installation script written in bash was created to facilitate this step on a server with a compatible Linux distribution.
    You must have access to your server via SSH and a root account to use it, which will install the dependencies. Contact your provider if you do not have that.
    The documentation of the use of this installation script is available here.
    The code of this (...)

  • Demande de création d’un canal

    12 mars 2010, par

    En fonction de la configuration de la plateforme, l’utilisateur peu avoir à sa disposition deux méthodes différentes de demande de création de canal. La première est au moment de son inscription, la seconde, après son inscription en remplissant un formulaire de demande.
    Les deux manières demandent les mêmes choses fonctionnent à peu près de la même manière, le futur utilisateur doit remplir une série de champ de formulaire permettant tout d’abord aux administrateurs d’avoir des informations quant à (...)

Sur d’autres sites (5585)

  • FFmpeg for marking time video based on a reference date

    3 août 2016, par Denio Mariz

    I am trying to mark a timestamp in a video using Drawtext filter.
    FFmpeg easily marks timestamps based on localtime, gmtime or even PTS. However, I want to assign a reference time (start time) for the timestamp in order to represent the time the video was recorded (not encoded).

    Reading the documentation, I found that option "basetime" can be used for this purpose. However it seems that is not working or I am missing something.

    The command line I am using is :

    ffmpeg -y -i input.mp4 -filter_complex drawtext="fontfile=/tmp/UbuntuMono-B.ttf: fontsize=36: fontcolor=yellow: box=1: boxcolor=black@0.4: text='Wall Clock Time\: %{gmtime\:%Y-%m-%d %T}': basetime=1456007118" output.mp4

    By using basetime=1456007118", it was expected the start time was set to ’02/20/2016 20:25:18’ since 1456007118 is the UTC time for that time and date :

    date -d '02/20/2016 20:25:18' +"%s" # format MM/DD/AAAA hh:mm:ss
    
1456007118

    However, no error is issued by FFMpeg and the video is marked with current GMT, ignoring "basetime" option.

    Any hint ?
    Thanks.

    Complete information about FFmpeg version and output is :

       ffmpeg -y -i /home/denio/Videos/Interstellar_2014_Trailer_4_5.1-1080p-HDTN.mp4 -filter_complex drawtext="fontfile=/tmp/UbuntuMono-B.ttf: fontsize=36: fontcolor=yellow: box=1: boxcolor=black@0.4: text='Wall Clock Time\: %{gmtime\:%Y-%m-%d %T}': basetime=1470226363" /tmp/x.mp4
       ffmpeg version 3.1.1 Copyright (c) 2000-2016 the FFmpeg developers
         built with gcc 5.3.1 (Ubuntu 5.3.1-14ubuntu2.1) 20160413
         configuration: --enable-libxavs --enable-bzlib --enable-libfaac --enable-libfreetype --enable-libfontconfig --enable-libmp3lame --enable-libschroedinger --enable-libspeex --enable-libvorbis --enable-libx264 --enable-libx265 --enable-libxvid --enable-zlib --enable-x11grab --enable-static --enable-pthreads --enable-gpl --enable-nonfree --enable-version3 --disable-ffserver --enable-libgsm --enable-librtmp --enable-libvpx --enable-libschroedinger --enable-libopencore-amrnb --enable-libopenjpeg
         libavutil      55. 28.100 / 55. 28.100
         libavcodec     57. 48.101 / 57. 48.101
         libavformat    57. 41.100 / 57. 41.100
         libavdevice    57.  0.101 / 57.  0.101
         libavfilter     6. 47.100 /  6. 47.100
         libswscale      4.  1.100 /  4.  1.100
         libswresample   2.  1.100 /  2.  1.100
         libpostproc    54.  0.100 / 54.  0.100
       ...
       ...

  • Revision 903801f1ef : vp9 decoder : row-based multi-threaded loopfilter Implemented parallel loopfilte

    28 décembre 2013, par Yunqing Wang

    Changed Paths :
     Modify /vp9/common/vp9_loopfilter.c


     Modify /vp9/common/vp9_loopfilter.h


     Modify /vp9/decoder/vp9_decodeframe.c


     Add /vp9/decoder/vp9_dthread.c


     Add /vp9/decoder/vp9_dthread.h


     Modify /vp9/decoder/vp9_onyxd_if.c


     Modify /vp9/decoder/vp9_onyxd_int.h


     Modify /vp9/decoder/vp9_thread.c


     Modify /vp9/decoder/vp9_thread.h


     Modify /vp9/vp9dx.mk



    vp9 decoder : row-based multi-threaded loopfilter

    Implemented parallel loopfiltering, which uses existing tile-
    decoding threads. Each thread works on one row, and when that row
    is loopfiltered, it moves to next unattended row. To ensure the
    correct filtering order, threads are synchronized and one
    superblock is filtered only if the superblocks it depends on are
    filtered already.

    To reduce synchronization overhead and speed up the decoder, we use
    nsync > 1 for high resolution.

    Performance tests :
    1. on desktop :
    8-tile 4k video using 8 threads, speedup : 70% - 80%
    4-tile HD video using 4 threads, speedup : 35%
    2. on mobile device(Nexus 7) :
    4-tile 1080p video using 4 threads, speedup : 18% - 25%
    4-tile 1080p video using 2 threads, speedup : 10% - 15%

    Change-Id : If54b4a11960dd706c22d5ad145ad94156031f36a

  • Add new build based on jQuery UI build file

    20 mars 2011, par jzaefferer

    + build.xml + build/ant-contrib-0.6.jar + build/google-compiler-20110320.jar Add new build based on jQuery UI build file

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