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Médias (1)
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Publier une image simplement
13 avril 2011, par ,
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (71)
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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 (...) -
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 (13223)
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Changelog : Add Support hevc,vp9,av1 codec fourcclist in enhanced rtmp protocol
5 septembre 2023, par Steven Liu -
phantomjs screenshots and ffmpeg frame missing
20 octobre 2015, par Bussiness WayI have problem making video from website screenshots taken from phantomjs.
the phantomjs did not make screenshots for all frames within the same second and even not all seconds there , there is huge missing frames .
the result is high speed video playing with many jumps in video effects .
test.js :
var page = require('webpage').create(),
address = 'http://raphaeljs.com/polar-clock.html',
duration = 5, // duration of the video, in seconds
framerate = 24, // number of frames per second. 24 is a good value.
counter = 0,
width = 1024,
height = 786;
frame = 10001;
page.viewportSize = { width: width, height: height };
page.open(address, function(status) {
if (status !== 'success') {
console.log('Unable to load the address!');
phantom.exit(1);
} else {
window.setTimeout(function () {
page.clipRect = { top: 0, left: 0, width: width, height: height };
window.setInterval(function () {
counter++;
page.render('newtest/image'+(frame++)+'.png', { format: 'png' });
if (counter > duration * framerate) {
phantom.exit();
}
}, 1/framerate);
}, 200);
}
});this will create 120 image , this is correct count , but when you see the images one by one you will see many duplicate the same contents and many missing frames
ffmpeg :
fmpeg -start_number 10001 -i newtest/image%05d.png -c:v libx264 -r 24 -pix_fmt yuv420p out.mp4
I know this script and ffmpeg command not perfect , because I did hundred of changes without lucky, and I lost the correct setting understanding .
an anyone guide me to fix this ?.
thank you all
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How to extract per Coding Tree Unit (CTU) Quantization Parameter (QP) from a h.265 encoded video [closed]
16 avril 2023, par ali falahatiI want to extract and analyze per CTU or per macro-block information such as QP value from a encoded video file.


All the methods I found are either changing the ffmpeg source code or deprecated tools. Also other questions are not answered correctly.
I wanted to know if there is a simple, straight forward and up to date tutorial on how to extract QP values from an encoded video file using tools such as HM or ffmpeg.
Even if the only way to do it is to change the source code of ffmpeg please provide a clear explanation of what to do and change.