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Autres articles (24)
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Demande de création d’un canal
12 mars 2010, parEn fonction de la configuration de la plateforme, l’utilisateur peu avoir à sa disposition deux méthodes différentes de demande de création de canal. La première est au moment de son inscription, la seconde, après son inscription en remplissant un formulaire de demande.
Les deux manières demandent les mêmes choses fonctionnent à peu près de la même manière, le futur utilisateur doit remplir une série de champ de formulaire permettant tout d’abord aux administrateurs d’avoir des informations quant à (...) -
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. -
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 (6925)
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build : Allow generating dependencies as a side-effect of assembling
13 octobre 2016, par Diego Biurrun -
Best way to record a HTML Canvas/WebGL animation server-side into a video ?
19 novembre 2022, par AbhinavI have a set of animations which I can make in Canvas (fabric.js) or WebGL (three.js). I need to record them automatically, server-side, through a script and output a video file.



The animations include :



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- Pictures
- Videos (with audio)
- Other animations/effects









I have researched a lot during last few months on this.



Results

1. Use PhantomJS + FFMPEG

Run HTML Canvas animations on headless browser(PhantomJS) and record with FFMPEG. Here the issue is PhantomJS supports neither WebGL nor Video element. http://phantomjs.org/supported-web-standards.html
2. Use Websockets to send data back to server using DataURL

Here again, we will need to run the animations on browser (which we can't because we have to do everything on server).
3. Use node-canvas

This is a library by TJ Holowaychuk which allows rendering HTML Canvas on Node.js. But it has its own limitations plus I haven't really explored this field much. 
(If someone could shed more light on this library)


If anyone has done it before or can guide me somewhere useful.

All we need to do is use some data to create animations and record it into a video, everything on server side.

- Pictures
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With apulsator in ffempeg - How do I make so one side does not completely become silent ?
3 avril 2022, par corgrathI am trying to learn more about signal processing and the
apulsatoreffect in ffmpeg.

http://ffmpeg.org/ffmpeg-filters.html#apulsator


With the most default example :


ffmpeg -y -i input.mp3 -af "apulsator=hz=0.0625:timing=hz:mode=sine" output.mp3

You can clearly hear that the sound travels from left to right and then back to left, as expected.


However, I am trying to understand how/if it is possible that sound volume does not completely becomes silent, but perhaps 10% of the volume, while the other side gets 90%.


What I am trying to achieve is that one side does not completely becomes silent.


If this cannot be achieved solely by the
apulsatorsettings, what other effects or ways can I achieve this using ffmpeg ?

Any advice is appreciated !


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