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Richard Stallman et le logiciel libre
19 octobre 2011, par
Mis à jour : Mai 2013
Langue : français
Type : Texte
Autres articles (111)
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Websites made with MediaSPIP
2 mai 2011, parThis page lists some websites based on MediaSPIP.
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Creating farms of unique websites
13 avril 2011, parMediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...) -
Configurer la prise en compte des langues
15 novembre 2010, parAccéder à la configuration et ajouter des langues prises en compte
Afin de configurer la prise en compte de nouvelles langues, il est nécessaire de se rendre dans la partie "Administrer" du site.
De là, dans le menu de navigation, vous pouvez accéder à une partie "Gestion des langues" permettant d’activer la prise en compte de nouvelles langues.
Chaque nouvelle langue ajoutée reste désactivable tant qu’aucun objet n’est créé dans cette langue. Dans ce cas, elle devient grisée dans la configuration et (...)
Sur d’autres sites (9345)
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ffmpeg rotate overlay image background transparent on video [closed]
5 mai 2021, par Abhi Panchal'ffmpeg -y -i video.mp4 -i bells_sticker.png -filter_complex "[1:v]rotate='90*PI/180:c=black@0'[rotate] ;[rotate]scale=238:238[b] ;[0][b] overlay=100:50:enable='between(t,0,20)'" -codec:a copy StickerWithVideo.mp4'


I get black background behind the input image


try also this for remove background


c=0x00000000
c=none






i'm say thanks in advance


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Converting png images series to webm with transparent white background from Daz3d
25 août 2015, par JamesI’m trying to make a webm video with a transparent background from a Daz3D model.
My process is export png image series with transparent background from Daz3D, use ffmpeg to convert png series to webm video.
This was working well in Daz3D 4.6.But in Daz3D 4.8 the exported background is black instead of white, so when converted to webm is ok on Chrome as has the transparency, but on Firefox is black and has a halo (as Firefox does not support transparency so displays background).
So I’m looking for a solution with Daz3D, or tools like ImageMagik.
I almost got it with ImageMagik,convert -alpha extract *.png mask.png
mogrify -flatten talk*.png
for /f %x in ('dir /s /b blink*.png') do @composite -compose CopyOpacity mask-0.png %x %xBut for some reason the final webm has a white background not transparent ...
Some more info here,http://www.daz3d.com/forums/discussion/61237/daz3d-4-8-png-background-is-black
and here,
http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=28214
>
Doh, okay I figured it out. My images were good, but I somehow have two different versions of ffmpeg on my computer and was using the wrong one that doesn’t seem to support transparency.Now it is working.
My only issue is the last shell line,
for /f %x in (’dir /s /b blink*.png’) do @composite -compose CopyOpacity mask-0.png %x %x
This only uses mask-0.png, instead of mask-1 for blink01.png, mask-2 for blink02.png etc.
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FFMPEG Overlay Not Found For Putting Watermark in Video
6 mars 2021, par Devin DixonI am trying to put a logo in an rtmp stream using ffmpeg. My version of ffmpeg is
ffmpeg version 4.3.1
Currently in my complex filter I have :

ffmpeg -re -i 'video.mp4' -filter_complex "tpad=start_duration=10:stop_duration=15:start_mode=add:color=black:stop_mode=add" -f flv rtmp://example.com/a/stream



And it works ! But when I add :overlay=0:0 at the end :


ffmpeg -re -i 'video.mp4' -i image.jpeg -filter_complex "tpad=start_duration=10:stop_duration=15:start_mode=add:color=black:stop_mode=add:overlay=0:0" -f flv rtmp://example.com/a/stream



I get the errors :


[Parsed_tpad_0 @ 0x555bc5d99f40] Option 'overlay' not found
[AVFilterGraph @ 0x555bc5e7a980] Error initializing filter 'tpad' with args 'start_duration=10:stop_duration=15:start_mode=add:color=black:stop_mode=add:overlay=0:0'
Error initializing complex filters.
Option not found



What might I be doing wrong ?