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  • La file d’attente de SPIPmotion

    28 novembre 2010, par

    Une file d’attente stockée dans la base de donnée
    Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
    Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...)

  • Contribute to documentation

    13 avril 2011

    Documentation is vital to the development of improved technical capabilities.
    MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
    To contribute, register to the project users’ mailing (...)

  • Use, discuss, criticize

    13 avril 2011, par

    Talk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
    The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
    A discussion list is available for all exchanges between users.

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  • FFMPEG improve MP4 encoding speed [on hold]

    17 septembre 2015, par Kim T

    My input files are MP4, which are combined with an overlay to one MP4 video file. How can I improve the speed of these FFMPEG commands ?

    ./ffmpeg -y -i intro.mp4 -f mpegts 0.ts
    
./ffmpeg -y -i record.mp4 -i overlay.png -filter_complex "[0:v][1:v] overlay=0:0" -ac 2 -f mpegts 1.ts
    
./ffmpeg -y -i outro.mp4 -f mpegts 2.ts
    
./ffmpeg -y -i "concat:0.ts|1.ts|2.ts" -vcodec libx264 -preset ultrafast -strict -2 output.mp4

    Commands that improved speed :

    • upgrading ffmpeg to version 2.42 with neon support for my device
    • -f mpegts = converts videos to transport streams which process faster
    • -preset ultrafast = tells encoder to use fastest encoding preset
    • -ss before -i = seeks straight to start point without processing frames

    Commands where I saw no speed improvement :

    • -c copy = copies the stream, but this doesn’t seem to work on overlay filters and concats :(
    • -threads 2 = tells FFMPEG to use more threads, but don’t noticed an improvement over the default

  • aviflter/vf_waveform : speed up non-color filters

    10 novembre 2015, par Paul B Mahol
    aviflter/vf_waveform : speed up non-color filters

    Remove loops, output is also more interesting.
    

    Signed-off-by : Paul B Mahol <onemda@gmail.com>
    • [DH] libavfilter/vf_waveform.c

  • AAC encoder : simplify and speed up find_min_book

    21 septembre 2015, par Claudio Freire
    AAC encoder : simplify and speed up find_min_book

    Trivial change to simplify the small but hot
    
find_min_book function. The new form is easier to
    
understand and faster.
    • [DH] libavcodec/aacenc_utils.h
    • [DH] libavcodec/aacenctab.h
    • [DH] libavcodec/mips/aaccoder_mips.c

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