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Médias (1)

Mot : - Tags -/berlin

Autres articles (46)

  • 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 (...)

  • 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" ;

  • 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 (...)

Sur d’autres sites (6048)

  • truehd : add hand-scheduled ARM asm version of ff_mlp_rematrix_channel.

    20 mars 2014, par Ben Avison
    truehd : add hand-scheduled ARM asm version of ff_mlp_rematrix_channel.

    Profiling results for overall audio decode and the rematrix_channels function
    
in particular are as follows :
    

                  Before          After
    
              Mean   StdDev   Mean   StdDev  Confidence  Change
    
6:2 total     370.8  17.0     348.8  20.1    99.9%       +6.3%
    
6:2 function  46.4   8.4      45.8   6.6     18.0%       +1.2%  (insignificant)
    
8:2 total     343.2  19.0     339.1  15.4    54.7%       +1.2%  (insignificant)
    
8:2 function  38.9   3.9      40.2   6.9     52.4%       -3.2%  (insignificant)
    
6:6 total     658.4  15.7     604.6  20.8    100.0%      +8.9%
    
6:6 function  109.0  8.7      59.5   5.4     100.0%      +83.3%
    
8:8 total     896.2  24.5     766.4  17.6    100.0%      +16.9%
    
8:8 function  223.4  12.8     93.8   5.0     100.0%      +138.3%
    

    The assembly version has also been tested with a fuzz tester to ensure that
    
any combinations of inputs not exercised by my available test streams still
    
generate mathematically identical results to the C version.
    

    Signed-off-by : Martin Storsjö <martin@martin.st>
    • [DBH] libavcodec/arm/mlpdsp_armv5te.S
    • [DBH] libavcodec/arm/mlpdsp_init_arm.c

  • truehd : tune VLC decoding for ARM.

    20 mars 2014, par Ben Avison
    truehd : tune VLC decoding for ARM.

    Profiling on a Raspberry Pi revealed the best performance to correspond
    
with VLC_BITS = 5. Results for overall audio decode and the get_vlc2 function
    
in particular are as follows :
    

                  Before          After
    
              Mean   StdDev   Mean   StdDev  Confidence  Change
    
6:2 total     348.8  20.1     339.6  15.1    88.8%       +2.7%  (insignificant)
    
6:2 function  38.1   8.1      26.4   4.1     100.0%      +44.5%
    
8:2 total     339.1  15.4     324.5  15.5    99.4%       +4.5%
    
8:2 function  33.8   7.0      27.3   5.6     99.7%       +23.6%
    
6:6 total     604.6  20.8     572.8  20.6    100.0%      +5.6%
    
6:6 function  95.8   8.4      68.9   8.2     100.0%      +39.1%
    
8:8 total     766.4  17.6     741.5  21.2    100.0%      +3.4%
    
8:8 function  106.0  11.4     86.1   9.9     100.0%      +23.1%
    

    Signed-off-by : Martin Storsjö <martin@martin.st>
    • [DBH] libavcodec/mlpdec.c

  • FFMPEG - Slowing to a Specific Duration

    3 janvier 2019, par Purple Prince

    I have an unusual problem when working with ffmpeg. I’m fixing up some .wav files which have very small errors in their duration, on the order of 0.001% of the total length of the recording.

    The suggested solution is to use the atempo filter to slow the audio, but this isn’t precise enough for my application (sound synchronisation with video) due to floating point imprecision. Is there a way to set the desired length of the output and have the input scale to that length ?

    For example if I set a desired length of 3 minutes with an input of 02:59.56 duration, can I get an output of exactly 3 minutes ? With the atempo filter I’m more likely to get 2:59.95 or similar, which doesn’t solve my issue.

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