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Autres articles (42)
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La file d’attente de SPIPmotion
28 novembre 2010, parUne file d’attente stockée dans la base de donnée
Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...) -
Contribute to documentation
13 avril 2011Documentation is vital to the development of improved technical capabilities.
MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
To contribute, register to the project users’ mailing (...) -
Récupération d’informations sur le site maître à l’installation d’une instance
26 novembre 2010, parUtilité
Sur le site principal, une instance de mutualisation est définie par plusieurs choses : Les données dans la table spip_mutus ; Son logo ; Son auteur principal (id_admin dans la table spip_mutus correspondant à un id_auteur de la table spip_auteurs)qui sera le seul à pouvoir créer définitivement l’instance de mutualisation ;
Il peut donc être tout à fait judicieux de vouloir récupérer certaines de ces informations afin de compléter l’installation d’une instance pour, par exemple : récupérer le (...)
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Merge commit ’04763c6f87690b31cfcd0d324cf36a451531dcd0’
18 mars 2017, par Clément BœschMerge commit ’04763c6f87690b31cfcd0d324cf36a451531dcd0’
* commit ’04763c6f87690b31cfcd0d324cf36a451531dcd0’ :
h264_direct : use the reference mask from the actual referenceThis commit is a noop, see d8151a7e944aea52d167571badc247c8d9972847
Merged-by : Clément Bœsch <u@pkh.me>
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ffmpeg - prop flicker removal works but ffmpeg insists on changing framerate [closed]
28 avril 2023, par Mutley EugeniusI have been researching how to use FFmpeg to do some fantastic wizardry on my cockpit videos to remove the dramatically distracting propeller, but after many hours now I cannot seem to find a way to get the program to stop stripping more than half the frames. The source video file is 1920 x 1080 @ 60fps and I believe I have my offset right (1/60= 0.0166) but the output video is always coming out at 25 fps. Can't see what element in the code is telling it to do that, or how to change it.


Here's my file :


https://drive.google.com/file/d/1VPttH4PHgUr0uzmsbl4Bcyg5_gAixblA/view?usp=sharing


Here's my code :


ffmpeg -i G:\PropFlicker.mp4 -itsoffset 0.01666 -i G:\PropFlicker.mp4 -filter_complex color=0x202020:s=1920x1080:d=24[mask];[mask][0][1]maskedmax=[out] -map [out] -crf 10 G:\PropNoFlicker.mp4



I have tried adding
-r 60
which gives me a 60 fps output file, but the video is still being processed at 25 and it just adds in duplicated frames after processing to pad it out to 60. The rendering shows more dropped frames than rendered frames by about a 3 to 2 ratio which matches frame drops from 60 to 25. I lose my shot fluidity and I get flickery artifacts

What am I missing to get the flicker removal processing done at 60 fps and the output file rendered at 60 fps with the original smoothness ?


I'm also not sure what the :d=24 is doing. I tried d=60, but it made no difference.


I copied original code that I found in this link :




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FFMPEG Wipe transition one layer over another
25 juillet 2021, par Dan WeaverHow to reveal one layer over another with a wipe transition using FFMPEG ?




NOTE : this is not a slide transition. The top image stays in one position but is gradually revealed over time.


I'd like a technique that can work for top layers with or without transparency and for images, videos or dynamically created sources, like
showwavespic
.

I tried making a mask animation like so :




but
alphamerge
doesn't work as I expected it to and I can't find ablend
mode that works with this type of mask.

EDIT : The
xfade
filter was suggested but it doesn't seem to work with when source has transparency. It renders transparent areas black. Example with transparent source :



But
xfade
renders this :