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  • 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 (...)

  • 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 (...)

  • Changer son thème graphique

    22 février 2011, par

    Le thème graphique ne touche pas à la disposition à proprement dite des éléments dans la page. Il ne fait que modifier l’apparence des éléments.
    Le placement peut être modifié effectivement, mais cette modification n’est que visuelle et non pas au niveau de la représentation sémantique de la page.
    Modifier le thème graphique utilisé
    Pour modifier le thème graphique utilisé, il est nécessaire que le plugin zen-garden soit activé sur le site.
    Il suffit ensuite de se rendre dans l’espace de configuration du (...)

Sur d’autres sites (8854)

  • ffmpeg seeking drops consistently two frames from the start of segments

    27 janvier 2018, par Fernando D'Andrea

    I’m trying to script-cut a 24 fps video and it gets close to the right thing, except for two missing frames at the beginning of every segment I cut with seeking.

    I’ve found out that index-frames (keyframes) could become an issue for seeking, so I first create an intermediate file with every frame as a index frame using this line :

    ffmpeg -i input.mov -c:v libx264 -g 1 -c:a copy intermediate.mp4

    Then I proceed to make a cut with this line. Notice I’m drawing some text on top of it :

    ffmpeg -hide_banner -y -i intermediate.mp4 -ss 00:00:02.083333333333 -to 00:00:02.875000000000 -vf drawtext=fontfile=DroidSans.ttf:fontsize=48:text="segment2":fontcolor=yellow:box=1:boxborderw=16:boxcolor=black@0.5:x=w/32:y=h/18 output.mp4

    No matter the length of the segment, the first two frames get dropped.

    I’m using python do control ffmpeg.

    Any ideas ?

    Edit :

    Running ffprobe on one of the generated segments with ffprobe -hide_banner Nixing_0010_0010.mp4 says the following :

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Nixing_0010_0010.mp4':

    Metadata:
       major_brand     : isom
       minor_version   : 512
       compatible_brands: isomiso2avc1mp41
       encoder         : Lavf57.82.101
     Duration: 00:00:02.11, start: 0.000000, bitrate: 4717 kb/s
       Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 4751 kb/s, 24 fps, 24 tbr, 12288 tbn, 48 tbc (default)
       Metadata:
         handler_name    : VideoHandler
         timecode        : 00:00:00:00
       Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 2 kb/s (default)
       Metadata:
         handler_name    : SoundHandler
       Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s
       Metadata:
         handler_name    : TimeCodeHandler
         timecode        : 00:00:00:00

  • Stripping a video with start point and end point defined using TimeCodes

    12 juin 2014, par Tarun

    Is anyone aware about how to strip a segment out of a video , a segment whose start point and end points are defined by TimeCode not TimeStamp.

    I tried ffmpeg and ffmbc but I dont think they support cutting video based on timeCode.

    I have also considered approach where I can attemp to convert a timecode into timestamp

    Would anyone please advise ?

  • concatdec : add option for adding segment start time and duration metadata

    24 octobre 2015, par Marton Balint
    concatdec : add option for adding segment start time and duration metadata

    Reviewed-by : Nicolas George <george@nsup.org>
    
Signed-off-by : Marton Balint <cus@passwd.hu>
    • [DH] doc/demuxers.texi
    • [DH] libavformat/concatdec.c

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