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Autres articles (69)
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Le profil des utilisateurs
12 avril 2011, parChaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...) -
La sauvegarde automatique de canaux SPIP
1er avril 2010, parDans le cadre de la mise en place d’une plateforme ouverte, il est important pour les hébergeurs de pouvoir disposer de sauvegardes assez régulières pour parer à tout problème éventuel.
Pour réaliser cette tâche on se base sur deux plugins SPIP : Saveauto qui permet une sauvegarde régulière de la base de donnée sous la forme d’un dump mysql (utilisable dans phpmyadmin) mes_fichiers_2 qui permet de réaliser une archive au format zip des données importantes du site (les documents, les éléments (...) -
Supporting all media types
13 avril 2011, parUnlike most software and media-sharing platforms, MediaSPIP aims to manage as many different media types as possible. The following are just a few examples from an ever-expanding list of supported formats : images : png, gif, jpg, bmp and more audio : MP3, Ogg, Wav and more video : AVI, MP4, OGV, mpg, mov, wmv and more text, code and other data : OpenOffice, Microsoft Office (Word, PowerPoint, Excel), web (html, CSS), LaTeX, Google Earth and (...)
Sur d’autres sites (9003)
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MEAN stack express.js video uploader/converter
5 janvier 2017, par MattJThe idea is a social site where people can upload their videos. I am planning to use multer for uploading (limiting by size and by mimetype). Then for performance and mostly storage purposes to use fluent-ffmpeg and convert it to mp4 format and store it somewhere on the server with a reference in mongodb. Since I do not want the user to wait while the whole process is done, I plan to separate it into to main parts :
- Uploading
- Converting and storing.
Where the user uploads the file and then some separate node process ( using node-schedule) which run checks every 1 min. or so to convert all files in the directory and after that adds the references to mongodb. So what do you guys think ? What is the best approach performance-wise ?
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How to convert VP8 track with different frame resolution to h264
13 septembre 2016, par NikitaI have a .webm file with VP8 track, recorded from WebRTC stream by external service (TokBox Archiving). The stream is adaptive, so each frame in track could have different resolution. Most players (in webkit browsers) use video resolution from track description (which is always 640x480) and scale frames to this resolution. Firefox and VLC player uses real frame resolution, changing video resolution respectively.
I want to achieve 2 goals :
- play this video in Internet Explorer 9+ without additional plugin installation.
- change frames resolution to one fixed resolution, so the video will look identically in different browsers.
So, my plan is :
- extract frames from source webm file to images with real frame resolution (e.g. PNG or BMP) (how could I do that ?)
- find max width and max height of images
- add black padding to images, so smaller frames will be in the center of a new frame (of size MAX_WIDHTxMAX_HEIGHT)
- combine images to h264 track using ffmpeg
Is all correct ? How can I achieve this ? Can this algorithm be optimized some way ?
I tried ffmpeg to extract images, but it does not parse real frame resolution, using resolution from track header.
I think some libwebm functions can help me (to parse frame headers and extract images). Maybe someone has some code snippets to do this ?Example .webm (download source, do not play google-converted version) : https://drive.google.com/file/d/0BwFZRvYNn9CKcndhMzlVa0psX00/view?usp=sharing
Official description of adaptive stream from TokBox support : https://support.tokbox.com/hc/en-us/community/posts/206241666-Archived-video-resolution-is-supposed-to-be-720x1280-but-reports-as-640x480
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How to Measure Marketing Effectiveness : A Step-by-Step Guide
22 février 2024, par Erin