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Autres articles (41)
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Use, discuss, criticize
13 avril 2011, parTalk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
A discussion list is available for all exchanges between users. -
ANNEXE : Les plugins utilisés spécifiquement pour la ferme
5 mars 2010, parLe site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)
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Configuration spécifique d’Apache
4 février 2011, parModules spécifiques
Pour la configuration d’Apache, il est conseillé d’activer certains modules non spécifiques à MediaSPIP, mais permettant d’améliorer les performances : mod_deflate et mod_headers pour compresser automatiquement via Apache les pages. Cf ce tutoriel ; mode_expires pour gérer correctement l’expiration des hits. Cf ce tutoriel ;
Il est également conseillé d’ajouter la prise en charge par apache du mime-type pour les fichiers WebM comme indiqué dans ce tutoriel.
Création d’un (...)
Sur d’autres sites (8537)
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How to use Python to capture thumbnails from online videos without downloading the entire video ? [closed]
28 septembre 2023, par gaowanliangWhen watching online videos, the web player can always drag the progress bar without having to download the entire video. This is thanks to the Range in the header, which can specify the range for playback. But I can’t find a way to use Python or ffmpeg to capture a part of the video content from a network video.


The program does not need to be very accurate in how long it takes to capture a screenshot, but it does not need to download the entire video completely.


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Model the loss of video codec
10 janvier 2024, par MonacoI want to use a neural network to model the error loss after video encoding. The modeling process is as follows :


I use ffmpeg to encode and decode video frames. Since this process is not implemented using tensors in PyTorch and cannot compute gradients, I have to separately implement a neural network in PyTorch to enable gradient backpropagation. However, it turns out that the neural network cannot effectively learn the video encoding.


I want to know if there are currently any implementations of video encoders or decoders that support backpropagation of gradients. I don't necessarily need to update the parameters of the encoder/decoder, but I want it to support gradient backpropagation so that I can use it for various tasks related to deep learning.


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ffmpeg : How to use blackdetect filter and cut black frames at once
25 juin 2012, par cacheI use the following command to detect black screen interval :
" ffmpeg -i black.mp4 -vf blackdetect=d=1:pic_th=0.70:pix_th=0.10 -an -f null "
and it gives me output containing this line :
"[blackdetect @ 0x219a580] black_start:0 black_end:1.44 black_duration:1.44"Now I want to cut off black screens in the video from 0-1.44s.
So my question is : How to use blackdetect filter and cut black frames at once
Thanks !