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Médias (39)

Mot : - Tags -/audio

Autres articles (109)

  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • 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 (...)

  • XMP PHP

    13 mai 2011, par

    Dixit Wikipedia, XMP signifie :
    Extensible Metadata Platform ou XMP est un format de métadonnées basé sur XML utilisé dans les applications PDF, de photographie et de graphisme. Il a été lancé par Adobe Systems en avril 2001 en étant intégré à la version 5.0 d’Adobe Acrobat.
    Étant basé sur XML, il gère un ensemble de tags dynamiques pour l’utilisation dans le cadre du Web sémantique.
    XMP permet d’enregistrer sous forme d’un document XML des informations relatives à un fichier : titre, auteur, historique (...)

Sur d’autres sites (12263)

  • lavc/vaapi_encode : grow packet if vaMapBuffer returns multiple buffers

    31 mai 2019, par Linjie Fu
    lavc/vaapi_encode : grow packet if vaMapBuffer returns multiple buffers

    Currently, assigning new buffer for pkt when multiple buffers were returned
    
from vaMapBuffer will overwrite the previous encoded pkt data and lead
    
to encode issues.
    

    Iterate through the buf_list first to find out the total buffer size
    
needed for the pkt, allocate the whole pkt to avoid repeated reallocation
    
and memcpy, then copy data from each buf to pkt.
    

    Signed-off-by : Linjie Fu <linjie.fu@intel.com>
    • [DH] libavcodec/vaapi_encode.c

  • tf.contrib.signal.stft returns an empty matrix

    9 décembre 2017, par matt-pielat

    This is the piece of code I run :

    import tensorflow as tf
    

    
sess = tf.InteractiveSession()
    

    
filename = 'song.mp3' # 30 second mp3 file
    
SAMPLES_PER_SEC = 44100
    

    
audio_binary = tf.read_file(filename)
    

    
pcm = tf.contrib.ffmpeg.decode_audio(audio_binary, file_format='mp3', samples_per_second=SAMPLES_PER_SEC, channel_count = 1)
    
stft = tf.contrib.signal.stft(pcm, frame_length=1024, frame_step=512, fft_length=1024)
    

    
sess.close()

    The mp3 file is properly decoded because print(pcm.eval().shape) returns :

    (1323119, 1)

    And there are even some actual non-zero values when I print them with print(pcm.eval()[1000:1010]) :

    [[ 0.18793298]
    
 [ 0.16214484]
    
 [ 0.16022217]
    
 [ 0.15918455]
    
 [ 0.16428113]
    
 [ 0.19858395]
    
 [ 0.22861415]
    
 [ 0.2347789 ]
    
 [ 0.22684409]
    
 [ 0.20728172]]

    But for some reason print(stft.eval().shape) evaluates to :

    (1323119, 0, 513) # why the zero dimension?

    And therefore print(stft.eval()) is :

    []

    According to this the second dimension of the tf.contrib.signal.stft output is equal to the number of frames. Why are there no frames though ?

  • aarch64 : vp9 : use alternative returns in the core loop filter function

    14 novembre 2016, par Janne Grunau
    aarch64 : vp9 : use alternative returns in the core loop filter function

    Since aarch64 has enough free general purpose registers use them to
    
branch to the appropiate storage code. 1-2 cycles faster for the
    
functions using loop_filter 8/16, ... on a cortex-a53. Mixed results
    
(up to 2 cycles faster/slower) on a cortex-a57.
    • [DBH] libavcodec/aarch64/vp9lpf_neon.S

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