Recherche avancée

Médias (91)

Autres articles (28)

  • Qualité du média après traitement

    21 juin 2013, par

    Le bon réglage du logiciel qui traite les média est important pour un équilibre entre les partis ( bande passante de l’hébergeur, qualité du média pour le rédacteur et le visiteur, accessibilité pour le visiteur ). Comment régler la qualité de son média ?
    Plus la qualité du média est importante, plus la bande passante sera utilisée. Le visiteur avec une connexion internet à petit débit devra attendre plus longtemps. Inversement plus, la qualité du média est pauvre et donc le média devient dégradé voire (...)

  • Ajouter notes et légendes aux images

    7 février 2011, par

    Pour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
    Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
    Modification lors de l’ajout d’un média
    Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...)

  • 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 (...)

Sur d’autres sites (3294)

  • What is a good/simple way to obtain a stream of song metadata from an online radio station ?

    29 juin 2022, par esp

    What is a good/simple way to obtain a stream of song metadata (artist names and song titles etc.) from an online radio station ? Just the metadata, not the data (media). On bash command-line for now, thinking of getting it to a database (eg MySQL) in future.

    


    I have had success using FFMpeg to do this (simply FFMpeg -i <streamurl></streamurl>). However it only reports the song playing once - when it is run. If I specify an outputfile (e.g. -f null -) then it continues to run but does not report any updates to the "now playing" metadata. If I do not specify an output file then, after reporting that metadata, it quits (which in my case is more useful !).

    &#xA;

    I can imagine one way round this would be to make a polling-loop, say every 10 seconds, only reporting when the metadata has changed (since the previous time). Does anyone have a battle-tested example ?

    &#xA;

    But is there a better (or cooler way) to achieve this ?

    &#xA;

  • Revision 8701ed0270 : update vp9_thread.c pull the latest from libwebp. Original source : http://git

    9 juillet 2014, par James Zern

    Changed Paths :
     Modify /test/vp9_thread_test.cc


     Modify /vp9/common/vp9_thread.c



    update vp9_thread.c

    pull the latest from libwebp.

    Original source :
    http://git.chromium.org/webm/libwebp.git
    100644 blob 264210ba2807e4da47eb5d18c04cf869d89b9784 src/utils/thread.c

    commit 46fd44c1042c9903b2f1ab87e9f200a13c7e702d
    Author : James Zern <jzern@google.com>
    Date : Tue Jul 8 19:53:28 2014 -0700

    thread : remove harmless race on status_ in End()

    if a thread was still doing work when End() was called there’d be a race
    on worker->status_. in these cases, however, the specific value is
    meaningless as it would be >= OK and the thread would have been shut
    down properly, but we’ll check ’impl_’ instead to avoid any potential
    TSan/DRD reports.

    Change-Id : Ib93cbc226a099f07761f7bad765549dffb8054b1

    Change-Id : Ib0ef25737b3c6d017fa74822e21ed58508230b91

  • Theora puts incorrect PTS presentation time on video with held frames

    17 mars 2012, par hexatron

    I have a problem with the packet PTS/DTS on OGG Theora videos with held frames.
    Theora tries to be clever about held frames by omitting duplicate frames
    and using the packet PTS/DTS (they are equal) to skip the held frame time.

    For example, a 2-second-long 10 fps video with frames
    
  A A A A A A A A A A B C D E F G G G G G
    
should encode with PTS (the frame start) as (note the encoder adds some dup frames)
    
    A 0.0
    
    A 0.1
    
    B 1.0
    
    C 1.1
    
    D 1.2
    
    E 1.3
    
    F 1.4
    
    G 1.5
    
    G 1.9
    
But libtheora (and ffmpeg) put an incorrect time stamp on frame B
    
(the first frame following a the dup frames)
    
    B 0.6
    
This causes video to hiccup on the mislabeled frame.
    

    
My crude fix for this is to use
    
    current frame PTS =  (next frame PTS time) - (one frame time)
    
and
    
    last frame PTS = duration - (one frame time)

    (I tried submitting a bug report for theora at xiph.org, as the theora site recommends, but could not figure out how to register for a login. I also noticed the reports were several years old, so decided to document this behavior here)

Navigation