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Médias (91)

Autres articles (36)

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

  • Emballe médias : à quoi cela sert ?

    4 février 2011, par

    Ce plugin vise à gérer des sites de mise en ligne de documents de tous types.
    Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;

  • Les images

    15 mai 2013

Sur d’autres sites (6187)

  • libavcodec/exr : fix channel size calculation for uint32 channel

    16 novembre 2016, par Martin Vignali
    libavcodec/exr : fix channel size calculation for uint32 channel

    uint32 need 4 bytes not 1.
    
Fix decoding when there is half/float and uint32 channel.
    

    This fixes crashes due to pointer corruption caused by invalid writes.
    

    The problem was introduced in commit
    
03152e74dfdc7f438cb4a10402c4de744e807e22.
    

    Signed-off-by : Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
    • [DH] libavcodec/exr.c

  • Revision 876c72a093 : AVX2 Convolve Optimization Two convolve functions were optimized for AVX2 : 1. v

    17 janvier 2014, par levytamar82

    Changed Paths :
     Modify /vp9/common/vp9_rtcd_defs.sh


     Modify /vp9/common/x86/vp9_asm_stubs.c


     Add /vp9/common/x86/vp9_subpixel_8t_intrin_avx2.c


     Modify /vp9/vp9_common.mk



    AVX2 Convolve Optimization

    Two convolve functions were optimized for AVX2 :
    1. vp9_filter_block1d16_h8
    2. vp9_filter_block1d16_v8
    vp9_filter_block1d16_v8 was optimized for AVX2 by reducing the number of
    loop strides by half, two strides were processed in parallel.
    vp9_filter_block1d16_v8 was also optimized in the same way also some of the
    loads were being done outside of the loop and by that preventing redundant
    loads.
    This Optimization gives 43% function level gain and 1.3% user level gain.
    Now can be compiled in Windows

    Change-Id : I2714124cfb0c14a77d7a0ce126a20db92ffbf92c

  • mencoder -> x264 : FPS problem : Video is 2x faster at the output

    28 mars 2011, par Julien Palard

    I got an input video, ffmpeg says about it : 29.96FPS 59.75 tbr 1k tbn 59.83 tbc
    My process to encode is :

    $ mencoder input_video -vf dsize=480:320:0,scale=0:0,expand=480:320,dsize=1.5,format=i420 -of rawvideo -ofps 25 -ovc raw -nosound -o output.yuv
    
$ x264 input_video --profile baseline --fps 25 [blahblah] -o output
    
$ MP4Box -add output.yuv -fps 25 output.mp4

    Im'simplificating a lot here to let you parse less as I'm encoding the audio apart and merging the result using mp4box.

    ffmpeg -i output says that the vid is : 25 FPS 25 tbr 25 tbn 50 tbc

    And while playing the video, the audio is normal, the video is 2x faster than input, so the video ends at the half of the audio track (compared to the input, the audio is good, it's just the video running 2x faster)

    Any idea about my problem ?

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