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  • 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

  • Personnaliser les catégories

    21 juin 2013, par

    Formulaire de création d’une catégorie
    Pour ceux qui connaissent bien SPIP, une catégorie peut être assimilée à une rubrique.
    Dans le cas d’un document de type catégorie, les champs proposés par défaut sont : Texte
    On peut modifier ce formulaire dans la partie :
    Administration > Configuration des masques de formulaire.
    Dans le cas d’un document de type média, les champs non affichés par défaut sont : Descriptif rapide
    Par ailleurs, c’est dans cette partie configuration qu’on peut indiquer le (...)

  • 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 (...)

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  • ffmpeg scale, how to crop correctly

    23 mars 2015, par sathia

    I’m using this command to encode videos

    $transcode = FFMPEG_BINARY.' -loglevel panic -y -i "'.$files['original'].'" -vf scale='.VIDEO_SIZE_X.':'.VIDEO_SIZE_Y.' -vcodec libx264 -profile main -preset slow -r 25 -b '.VIDEO_BITRATE.' -maxrate '.VIDEO_BITRATE.' -bufsize 1000k -threads '.VIDEO_THREADS.' -acodec aac -ar 44100 -f mp4 -strict -2 '.$files['mp4'];
    

    
where: VIDEO_SIZE_X = 640 and VIDEO_SIZE_Y = 480, VIDEO_BITRATE = 900k

    it all seems to work fine, but the problem I’m having is that the video is not resized to the desired size which is 640x480

    output from vlc

    ^ This is the output from vlc

    It looks like there’s some reference to the desired size, but the video is not scaled/cropped,
    what’s the correct way of scaling videos in order to have the desired size ? I don’t mind having black stripes above and below or bands at the sides.

    so, here’s a bit of debugging as requested :

    /usr/bin/ffmpeg -loglevel panic -y -i "in.wmv" -vf scale=640:480 -vcodec libx264 -profile main -preset slow -r 25 -b 900k -maxrate 900k -bufsize 1000k -threads 8 -acodec aac -ar 44100 -f mp4 -strict -2 out.mp4

    original video :

    [wmv3 @ 0x13245c0] Extra data: 8 bits left, value: 20
    
Input #0, asf, from 'in.wmv':
    
  Metadata:
    
    WMFSDKVersion   : 12.0.9600.16384
    
    WMFSDKNeeded    : 0.0.0.0000
    
    IsVBR           : 1
    
    VBR Peak        : 313
    
    Buffer Average  : 397
    
  Duration: 00:06:09.13, start: 0.000000, bitrate: 2111 kb/s
    
    Stream #0:0: Audio: wmav2 (a[1][0][0] / 0x0161), 48000 Hz, 2 channels, s16, 96 kb/s
    
    Stream #0:1: Video: wmv3 (Main) (WMV3 / 0x33564D57), yuv420p, 860x484, 2000 kb/s, SAR 1:1 DAR 215:121, 29.97 tbr, 1k tbn, 1k tbc
    
[wmv3 @ 0x13245c0] Extra data: 8 bits left, value: 20

    while the result is :

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'out.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf54.29.104
    
  Duration: 00:06:08.76, start: 0.000000, bitrate: 975 kb/s
    
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 645:484 DAR 215:121], 842 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, s16, 125 kb/s
    
    Metadata:
    
      handler_name    : SoundHandler

    cheers

  • Revision 691ec45b4e : Enable group adaptive max q by default. Set the GF group adaptive max Q compile

    23 mars 2015, par paulwilkins

    Changed Paths :
     Modify /vp9/encoder/vp9_firstpass.c



    Enable group adaptive max q by default.

    Set the GF group adaptive max Q compile flag to 1 by default.

    This change has a quite big visual impact in some clips and also
    contributes to tighter rate control.

    For short test clips that have consistent content the impact is
    quite small on metrics but for more varied long form clips there is
    a drop in overal psnr but a sharp rise in average psnr caused by
    greater expenditure on some easier sections and tighter rate clipping
    in hard sections.

    In chunck’ed encodes some of the effect will already be present due
    to the independent rate control in each chunk but this change takes
    the control down to a smaller scale.

    yt hd +10.67%, - 3.77%, -1.56%
    yt +9.654%, - 3.6%, - 1.82%
    std hd +0.25%, -0.85%, -0.42%
    derf +0.25%, - 1.1%. - 0.87%

    Change-Id : Ibbc39b800d99d053939f4c6712d715124082843e

  • curl | tar - gzip : stdin : not in gzip format

    16 avril 2015, par Jonathan Ong

    I’m trying to install ffmpeg on travis with this command :

    curl http://johnvansickle.com/ffmpeg/releases/ffmpeg-release-64bit-static.tar.xz | tar -C /usr/local/bin/ -xvz

    I get this error :

    $ curl http://johnvansickle.com/ffmpeg/releases/ffmpeg-release-64bit-static.tar.xz | tar -C /usr/local/bin/ -xvz
    
  % Total    % Received % Xferd  Average Speed   Time    Time     Time      Current
    
                                 Dload  Upload   Total   Spent    Left      Speed
    
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
    
gzip: stdin: not in gzip format
    
tar: Child died with signal 13
    
tar: Error is not recoverable: exiting now
    
The command "curl http://johnvansickle.com/ffmpeg/releases/ffmpeg-release-64bit-static.tar.xz | tar -C /usr/local/bin/ -xvz" failed and exited with 2 during .

    however, it works locally on OS X. what’s going on ?

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