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Médias (1)
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Bug de détection d’ogg
22 mars 2013, par
Mis à jour : Avril 2013
Langue : français
Type : Video
Autres articles (99)
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MediaSPIP 0.1 Beta version
25 avril 2011, parMediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...) -
Multilang : améliorer l’interface pour les blocs multilingues
18 février 2011, parMultilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela. -
L’agrémenter visuellement
10 avril 2011MediaSPIP est basé sur un système de thèmes et de squelettes. Les squelettes définissent le placement des informations dans la page, définissant un usage spécifique de la plateforme, et les thèmes l’habillage graphique général.
Chacun peut proposer un nouveau thème graphique ou un squelette et le mettre à disposition de la communauté.
Sur d’autres sites (11751)
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I transcode using the ffmpeg library, but the resulting video playback speed is different [closed]
25 novembre 2023, par 최용훈

I'm studying ffmpeg and trying to write a C++ wrapper.


The test code at the bottom of the video.cpp source in the test folder is a transcoding example, and the resulting video playback speed is about 5 times faster.


Timebase and FPS are the same because they are copied and used.


Why does this phenomenon occur ?




I found a problem similar to mine but it didn't help


I couldn't find anyone else with the same problem


I referred to the transcoding example and video_encoding example in the ffmpeg tutorial.


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How to get FFmpeg to consistently apply speed effect to first few frames ?
16 janvier 2021, par melody_florumI am using FFmpeg to apply speed effects to short gifs and videos and I noticed strange stuttering on looping gifs when sped up. I manually tested and found what was going on. FFmpeg failed to apply the speed filter to the first few frames of the video.


I started with this file, which loops between the numbers "1 2 3 4" every frame.




I then ran the command
ffmpeg -i 123410fps.mp4 -vf setpts=0.5*PTS 123410fpsout.mp4


That left me with this file : 123410fpsout.mp4


On close analysis, I discovered that the output file didn't show a repeating
1 3 1 3
or2 4 2 4
pattern, but shows1 2 3 4 1 3 1 3 1 3...
the speed effect didn't apply for the first few frames

I apologize if it sounds like i'm being super nitpicky, but my usage for this is on very short gifs and videos where this effect is very apparent. How can I prevent this effect from happening and have a 100% consistent speed effect applied to the video ? I don't mind using other non-ffmpeg software but a CLI solution that works easily for most videos is ideal.


In case anyone is wondering, I don't use ffmpeg to encode gifs, i use gifski from ffmpeg exported image sequences. The problem shows up even when no gifs are used, so it's not a gifski problem.


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Revision 336ca9a43a : Merge "keyframe_test : use a fixed speed step for realtime"
8 août 2012, par John KoleszarChanged Paths : Modify /test/encode_test_driver.h Merge "keyframe_test : use a fixed speed step for realtime"