Recherche avancée

Médias (16)

Mot : - Tags -/mp3

Autres articles (34)

  • Support de tous types de médias

    10 avril 2011

    Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)

  • List of compatible distributions

    26 avril 2011, par

    The table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
    If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...)

  • Selection of projects using MediaSPIP

    2 mai 2011, par

    The examples below are representative elements of MediaSPIP specific uses for specific projects.
    MediaSPIP farm @ Infini
    The non profit organizationInfini develops hospitality activities, internet access point, training, realizing innovative projects in the field of information and communication technologies and Communication, and hosting of websites. It plays a unique and prominent role in the Brest (France) area, at the national level, among the half-dozen such association. Its members (...)

Sur d’autres sites (6018)

  • Artifacts in WMP after speed-up and fps change

    11 septembre 2014, par Snow

    Trying to convert a 1 hour video with 0.02 fps, to a very short one (100 times speed-up) with somethinglike 10 fps to include in a powerpoint presentation.

    I did this :

    ffmpeg - input.mp4 -filter:v "setpts=0.01*PTS" -r 10 output.mp4

    Works great, play nicely with VLC or SMPlayer (which I believe use ffmpeg libraries for decoding). But if played with Windows Media Player, or inserted in a powerpoint presentation, this gives a lot of artifacts...the video is almost not watchable.

    Is there a way to make this watchable in powerpoint (i’m guessing the problem lies down with the video renderer used in powerpoint...)

  • Revision 1092140379 : No longer use use_lastframe_partitioning speed feature The speedup in rd_pick_p

    6 septembre 2014, par Yunqing Wang

    Changed Paths :
     Modify /vp9/encoder/vp9_speed_features.c



    No longer use use_lastframe_partitioning speed feature

    The speedup in rd_pick_partition() function makes it possible
    to drop use_lastframe_partitioning feature. By doing that, we
    achieve good PSNR gain with small speed loss. Also, this makes
    encoding loop less complicated. The code cleanup patch will
    follow.

    Borg tests showed :
    1. At speed 2,
    stdhd set : 0.201% PSNR gain, 0.133% SSIM gain ;
    derf set : 0.262% PSNR gain, 0.276% SSIM gain.
    2. At speed 3,
    stdhd set : 0.139% PSNR gain, 0.109% SSIM gain ;
    derf set : 0.447% PSNR gain, 0.442% SSIM gain.

    The average speed loss over selected test clips is within 1%
    with the worst case of 4%.

    Change-Id : Icfd2ded7869372b585a6972855d933b3d0280d90

  • Revision d62d804e64 : Speed up compound inter prediction mode check This commit allows the encoder to

    3 septembre 2014, par Jingning Han

    Changed Paths :
     Modify /vp9/encoder/vp9_block.h


     Modify /vp9/encoder/vp9_context_tree.h


     Modify /vp9/encoder/vp9_pickmode.c


     Modify /vp9/encoder/vp9_rdopt.c



    Speed up compound inter prediction mode check

    This commit allows the encoder to store outcomes of single reference
    frame modes and compares them to decide if the inter prediction
    filter, forward transform, and quantization can be skipped.

    The compression performance of speed 3 is down
    derf -0.364%
    stdhd -0.198%

    For test sequences, the speed 3 runtime is reduced
    highway CIF 100 kbps, 51976 ms -> 45033 ms, 13% speed-up
    stockholm 720p 1000 kbps, 71826 ms -> 67838 ms, 5.5% speed-up
    pedestrian 1080p 2000 kbps, 154924 ms -> 150702 ms, 2.6% speed-up

    Change-Id : I5aa26f918d2b4b5197a2c0afa2779319f1c88e44

Navigation