
Recherche avancée
Médias (1)
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MediaSPIP Simple : futur thème graphique par défaut ?
26 septembre 2013, par
Mis à jour : Octobre 2013
Langue : français
Type : Video
Autres articles (96)
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Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...) -
Emballe médias : à quoi cela sert ?
4 février 2011, parCe plugin vise à gérer des sites de mise en ligne de documents de tous types.
Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;
Sur d’autres sites (8090)
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Give a video rounded transparent edges so that it can be overlayed on another video using FFMPEG
15 octobre 2020, par Kevin JastiIm trying to overlay a smaller video (200x200)on top of a bigger video (800x800).



I've used the FFMPEG overlay filter to achieve this



ffmpeg -i big.mp4 -vf "movie=small.mkv[clip2]; [in][clip2] overlay=1:5 [out]" final.mp4




Challenge is that the smaller video needs its edges to be rounded.
I have tried working with alphaextract and alphamerge. The documentation on FFMPEG is sparse and im not sure how to go about it.


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Creating a transparent video out of an input video
28 juillet 2021, par poldownI'm trying to create a video with a transparent background out of an input video (with the same dimensions, etc.). I tried several strategies (using the
chromakey
filter and others) and none worked... I got this far :

ffmpeg -i input.mp4 -filter_complex "color=color=black@0.0,format=yuva420p[bg],[bg][0:v]scale2ref[bg][0v],[bg]drawbox=x=10:y=10:w=100:h=100:color=pink@0.5;[0v]nullsink" -c:v qtrle -an "alpha.mov"



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- creating a video stream with transparency, and setting a transparent background (black@0.0)
- scaling the transparent video according to the input video
- [for testing purposes : drawing a box over the transparent video. I omitted the part in which I embed subtitles onto the video, for simplicity's sake]
- discarding the input video stream
- removing the audio stream












It basically works, but the processing never ends - I can't manage to limit the output video length so it'll match the input video's length...
I've tried using the
-shortest
option anywhere in the command - with no success.

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Merge two video devices into a third device by placing the video next to each other
14 janvier 2021, par Lennart Van der GotenThe Situation


I have two webcams (with associated video devices
/dev/video0
and/dev/video1
). The first webcam generates a resolution of 720p while the other one generates 1080p.

The Task


I would like to create a new video device
/dev/video2
that is defined by putting the video from the first webcame next to the one coming from the second webcam.