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  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Possibilité de déploiement en ferme

    12 avril 2011, par

    MediaSPIP peut être installé comme une ferme, avec un seul "noyau" hébergé sur un serveur dédié et utilisé par une multitude de sites différents.
    Cela permet, par exemple : de pouvoir partager les frais de mise en œuvre entre plusieurs projets / individus ; de pouvoir déployer rapidement une multitude de sites uniques ; d’éviter d’avoir à mettre l’ensemble des créations dans un fourre-tout numérique comme c’est le cas pour les grandes plate-formes tout public disséminées sur le (...)

  • Ajouter des informations spécifiques aux utilisateurs et autres modifications de comportement liées aux auteurs

    12 avril 2011, par

    La manière la plus simple d’ajouter des informations aux auteurs est d’installer le plugin Inscription3. Il permet également de modifier certains comportements liés aux utilisateurs (référez-vous à sa documentation pour plus d’informations).
    Il est également possible d’ajouter des champs aux auteurs en installant les plugins champs extras 2 et Interface pour champs extras.

Sur d’autres sites (9139)

  • Nvenc session limit per GPU

    4 juin 2020, par teals

    I'm using Imageio, the python library that wraps around ffmpeg to do hardware encoding via nvenc. My issue is that I can't get more than 2 sessions to launch (I am using non-quadro GPUs). Even using multiple GPUs. I looked over NVIDIA's support matrix and they state only 2 sessions per gpu, but it seems to be per system.

    



    For example I have 2 GPUs in a system. I can either use the env variable CUDA_VISIBLE_DEVICES or set the ffmpeg flag -gpu to select the GPU. I've verified gpu usage using Nvidia-smi cli. I can get 2 encoding sessions working on a single gpu. Or 1 session working on 2 separate gpus each. But I can't get 2 encoding sessions working on 2 gpus.

    



    Even more strangely if I add more gpus I am still stuck at 2 sessions. I can't launch a third encoding session on a 3rd gpu. I am always stuck at 2 regardless of the # of gpus. Any ideas on how to fix this ?

    


  • aacenc_tns : rework the way coefficients are calculated

    29 août 2015, par Rostislav Pehlivanov
    aacenc_tns : rework the way coefficients are calculated

    This commit abandons the way the specifications state to
    
quantize the coefficients, makes use of the new LPC float
    
functions and is much better.
    

    The original way of converting non-normalized float samples
    
to int32_t which out LPC system expects was wrong and it was
    
wrong to assume the coefficients that are generated are also
    
valid. It was essentially a full garbage-in, garbage-out
    
system and it definitely shows when looking at spectrals
    
and listening. The high frequencies were very overattenuated.
    
The new LPC function performs the analysis directly.
    

    The specifications state to quantize the coefficients into
    
four bit index values using an asin() function which of course
    
had to have ugly ternary operators because the function turns
    
negative if the coefficients are negative which when encoding
    
causes invalid bitstream to get generated.
    

    This deviates from this by using the direct TNS tables, which
    
are fairly small since you only have 4 bits at most for index
    
values. The LPC values are directly quantized against the tables
    
and are then used to perform filtering after the requantization,
    
which simply fetches the array values.
    

    The end result is that TNS works much better now and doesn’t
    
attenuate anything but the actual signal, e.g. TNS removes
    
quantization errors and does it’s job correctly now.
    

    It might be enabled by default soon since it doesn’t hurt and
    
helps reduce nastyness at low bitrates.
    

    Signed-off-by : Rostislav Pehlivanov <atomnuker@gmail.com>
    • [DH] libavcodec/aaccoder.c
    • [DH] libavcodec/aacenc.c
    • [DH] libavcodec/aacenc.h
    • [DH] libavcodec/aacenc_tns.c
    • [DH] libavcodec/aacenc_tns.h

  • aacenc_pred : disable PNS SFBs and disable right predictors with IS

    6 septembre 2015, par Rostislav Pehlivanov
    aacenc_pred : disable PNS SFBs and disable right predictors with IS

    Since PNS generates coefficients it doesn’t make sense to send
    
the predicted ones as well. Also the specifications explicitly
    
state to disable right channel IS predictors.
    

    Signed-off-by : Rostislav Pehlivanov <atomnuker@gmail.com>
    • [DH] libavcodec/aacenc_pred.c

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