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  • À propos des documents

    21 juin 2013, par

    Que faire quand un document ne passe pas en traitement, dont le rendu ne correspond pas aux attentes ?
    Document bloqué en file d’attente ?
    Voici une liste d’actions ordonnée et empirique possible pour tenter de débloquer la situation : Relancer le traitement du document qui ne passe pas Retenter l’insertion du document sur le site MédiaSPIP Dans le cas d’un média de type video ou audio, retravailler le média produit à l’aide d’un éditeur ou un transcodeur. Convertir le document dans un format (...)

  • Modifier la date de publication

    21 juin 2013, par

    Comment changer la date de publication d’un média ?
    Il faut au préalable rajouter un champ "Date de publication" dans le masque de formulaire adéquat :
    Administrer > Configuration des masques de formulaires > Sélectionner "Un média"
    Dans la rubrique "Champs à ajouter, cocher "Date de publication "
    Cliquer en bas de la page sur Enregistrer

  • 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 (...)

Sur d’autres sites (8793)

  • Revision 5290eeab88 : Speed 2 feature adjustment. With sf->auto_mv_step_size on it is questionable wh

    3 juillet 2013, par Paul Wilkins

    Changed Paths :
     Modify /vp9/encoder/vp9_onyx_if.c



    Speed 2 feature adjustment.

    With sf->auto_mv_step_size on it is questionable
    whether sf->reduce_first_step_size is worthwhile.
    At speed 2 it was not having a big impact.

    Even at speed 2 sf->optimize_coefficients = 0 is not
    having a big speed imapct so for now I have moved it
    down into a higher speed setting.

    Change-Id : I8a54de76d486ad37aabce76474889da2768b14c1

  • How to speed up ffmpeg video conversions [closed]

    24 janvier 2013, par PIKP

    I need to extract the audio as a MP3 file from a given video file. I have selected "ffmpeg" for audio extraction process. with the use of following arguments I have managed to extract the audio as a MP3. this work very well. but it takes about "2 minutes" to extract the audio from "21 minutes" long video file.

    ffmpeg -i source_video.avi -vn -ar 44100 -ac 2 -ab 128k -f mp3 sound.mp3

    for my purpose "2 minutes" for "21 minutes" is a long time. I need to speed up this as much as possible.

    could someone please tell me what are the factors that control the conversion speed ?

    currently I'm using a SATA hard disk with 7500rmp, will it speed up the conversion process if I upgrade my hard disk to SSD ?

    Thank you !

  • x264 library speed - Altivec vs SSE2 -

    25 février 2013, par Omer Merdan

    I have simple cheap dualcore intel-3ghz-debian and access to super-expensive powerPc7-Aix.

    And after few days of strugle, i compiled libx264 and tested it on both computers :

    1. GCC : library x264 on intel (with SSE2 capabilities) and
    2. GCC on 16 core powerPc (with altivec).

    ... and result is that cheap intel is x2 times faster ! (with altivec disabled, intel is 10x times faster)

    My question : is this normal ?
    Does all other powerPC-users have same results ? Can powerPc-altivec-optimisation of x264 library work at same speed with intel... or MMX/SSE optimisation is officially at least 2 times faster for this library ?

    I am not interested in multi-thread options. Number of cores and threads are irrelevant. Just simple one-thread x264 encoding with default "medium preset" using rawvideo as source, sse vs altivec.

    Maybe native Aix XLC compiler provide better results ? (i managed only gcc to work)

    ... mac-powerpc-users maybe know something about this.

    powrPc7-Aix:$ time (cat raw10sec.y4m |x264 --input-res 720x576 --fps 50 -o /dev/null -)
    
x264: 64-bit XCOFF
    
x264 [info]: using cpu capabilities: Altivec
    
time: real 0m33.559s
    
---
    
intelDebian:$ time (cat raw10sec.y4m |x264 --input-res 720x576 --fps 50 -o /dev/null -)
    
x264: ELF 32-bit LSB executable
    
x264 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.1 Cache64
    
time: real 0m16.503s

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