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Médias (1)
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Video d’abeille en portrait
14 mai 2011, par
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (56)
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Ajouter des informations spécifiques aux utilisateurs et autres modifications de comportement liées aux auteurs
12 avril 2011, parLa 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. -
Les formats acceptés
28 janvier 2010, parLes commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
ffmpeg -codecs ffmpeg -formats
Les format videos acceptés en entrée
Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
Les formats vidéos de sortie possibles
Dans un premier temps on (...) -
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.
Sur d’autres sites (11540)
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Live webcam stream to mjpeg file [on hold]
20 mars 2018, par neph94I am looking for a way for ffmpeg or any other alternative to be able to continuously stream data to an mjpeg (or any other) file. There would be a size limitation to it. When exceeded oldest frames would just be removed to make space.
Basically, what I am looking is ffserver with an option to stream locally to a file without serving it on an HTTP server.
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What is the difference between "png" and "jpg -q 0" ?
28 août 2015, par xkfz007When you are using ffmpeg to extract images from videos, what is the difference between "png" and "jpg -q 0" ?
In my opinion, "-q 0" means the quantization is 0 and there is no compression. And the fact is the "jpg -q 0" is much smaller than "png"
The commands like :ffmpeg -i a.mp4 image-%d.png
ffmpeg -i a.mp4 -q 0 image-%d.jpg -
avcodec/aac* : Make initializing ff_aac_pow*sf_tab thread-safe
19 novembre 2020, par Andreas Rheinhardtavcodec/aac* : Make initializing ff_aac_pow*sf_tab thread-safe
This table is currently initialized up to three times : Once by the
encoder and twice by the decoders (once by the fixed and once by the
floating-point decoder) ; each of these initializations is guarded by an
AVOnce, yet the fact that there are three of them implies that there
might be data races (the fact that each entry is only written to once
(to its final value) when initializing means that this is safe in
practice, yet it is still undefined behaviour). Fix this by only
initializing the table from one place that is guarded by a single AVOnce.
This also avoids unnecessary duplications of the init code.Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@gmail.com>