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Médias (1)
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Video d’abeille en portrait
14 mai 2011, par
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (34)
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Encoding and processing into web-friendly formats
13 avril 2011, parMediaSPIP automatically converts uploaded files to internet-compatible formats.
Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
All uploaded files are stored online in their original format, so you can (...) -
Installation en mode ferme
4 février 2011, parLe mode ferme permet d’héberger plusieurs sites de type MediaSPIP en n’installant qu’une seule fois son noyau fonctionnel.
C’est la méthode que nous utilisons sur cette même plateforme.
L’utilisation en mode ferme nécessite de connaïtre un peu le mécanisme de SPIP contrairement à la version standalone qui ne nécessite pas réellement de connaissances spécifique puisque l’espace privé habituel de SPIP n’est plus utilisé.
Dans un premier temps, vous devez avoir installé les mêmes fichiers que l’installation (...) -
De l’upload à la vidéo finale [version standalone]
31 janvier 2010, parLe chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
Upload et récupération d’informations de la vidéo source
Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier ; La génération d’une vignette : extraction d’une (...)
Sur d’autres sites (4519)
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How to make a text animate (brighter, darker, brighter....) in ffmpeg ?
27 juin 2017, par Ko32moI know how to draw a text :
ffmpeg -i my.mp4 -vf drawtext="fontfile=some_font.ttf: text='some text': fontcolor=white: fontsize=28: [omitted]" -codec:a copy out.mp4
How can I draw a text which shines or animates ? Meaning, it slowly becomes brighter, then darker, then brighter again and so on.
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unity recorder use at runtime in C#
5 février 2020, par bluejaykeI’m using the unity recorder package in the editor, but I wasn’t sure / didn’t see in the docs if its possible to use the unity recorder package to capture video at runtime — meaning after the project is built to webGL etc., can unity record, and perhaps send / stream the video result to a server ? If not how else would this be accomplished ?
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Create a rolling X second webcam buffer in Linux, press button saves to file
13 août 2016, par Grant GibsonI’m working on a webcam installation with an ’instant replay’ feature. The concept is basically this :
- Webcam captures live, 24/7
- When user presses a key, the last (previous) 30 seconds of video saves to a file
- I’ll then compress that video using something like FFMPEG and upload to a remote server
I’m fine with step 3 and beyond, but I haven’t been able to find a solution that does the equivalent of a FIFO buffer for video streams [i.e. pretty much what the ’rewind live tv’ buffer on TiVo does].
Does anyone know of a way to keep a rolling webcam video/audio buffer that can be exported to a file ?
Design considerations :
- I’m planning to use a standard webcam, but open to other suggestions
- Recording would ideally be 1080p, 30fps
- Recording must include sound
- Linux hardware and OS can be specified in the answer, there are no existing pre-requisites. Raspberry Pi would be nice if that’s possible, but equally fine with a small Intel machine (e.g. NUC).
- There’s no requirement to save the 24/7 stream, but it’s ok if that’s a by-product. So, storage permitting it can be saving to a file continuously for say 12 hours and just ’cat’ the last 30 secs to a separate file, if that’s an option ? But better would be the 30 sec rolling FIFO buffer that could potentially do the whole job in RAM.
- The ’save instant replay’ button will eventually be a physical pushbutton rather than a keyboard key. However, I’ve got that side of things covered (if the solution is RPi I’d use the GPIO pins, if it’s an Intel box I’d probably use an Arduino in HID mode to simulate a keyboard press).