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Collections - Formulaire de création rapide
19 février 2013, par
Mis à jour : Février 2013
Langue : français
Type : Image
Autres articles (71)
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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 (...) -
Récupération d’informations sur le site maître à l’installation d’une instance
26 novembre 2010, parUtilité
Sur le site principal, une instance de mutualisation est définie par plusieurs choses : Les données dans la table spip_mutus ; Son logo ; Son auteur principal (id_admin dans la table spip_mutus correspondant à un id_auteur de la table spip_auteurs)qui sera le seul à pouvoir créer définitivement l’instance de mutualisation ;
Il peut donc être tout à fait judicieux de vouloir récupérer certaines de ces informations afin de compléter l’installation d’une instance pour, par exemple : récupérer le (...) -
MediaSPIP v0.2
21 juin 2013, parMediaSPIP 0.2 is the first MediaSPIP stable release.
Its official release date is June 21, 2013 and is announced here.
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)
Sur d’autres sites (4366)
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Motion Vectors and DC coefficients from MPEG4 stream
9 octobre 2013, par LampisI need to extract information about motion vectors and DC coefficients from an MPEG4 video. I've searched relevant sites and topics and I found that a good solution is to work with the code of ffmpeg codec. Especially the ff_print_debug_info function in libavcodec/mpegvideo.c calculates relevant information.
However, I'm new on the C/C++ field and if there is any example code that describes or explains how to extract MVs and DC coefficients that would be very helpful.
In the more recent version I use (FFmpeg 0.10.2 from http://ffmpeg.org/download.html) there is another file mpeg4videodec.c. Is there any chance to retrieve the needed information by this code ?
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Executing a binary file on webhost
25 avril 2016, par Samuel L JacksonI am on shared hosting with godaddy and am trying to install ffmpeg. I obtained a binary file for ffmpeg that works on godaddy hosting from here -
http://bogdan.org.ua/2007/06/28/compiled-linux-ffmpeg-binary-for-gallery2-download.html
I am wondering how to execute it on my account so it can be used.
Thank you for any help !
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Videos which don't play in Firefox : How to detect and how to fix ?
25 octobre 2019, par Max WilliamsI have, as test cases, two mp4 videos : they seem to be encoded the same, but one works in Firefox and one doesn’t :
bad.mp4 (doesn’t work) view download
good.mp4 (does work) view download
(NOTE - I thought that the "view" links above would open them using the browser’s built-in player, but it looks like they use Dropbox’s video player, which DOES work in firefox. So, to see it in firefox, download it and then drag it into Firefox or right click and choose Firefox from "open with" - thanks !)
They both play in Chrome.
There is a long discussion on the Mozilla bug tracking site about a related issue :
https://bugzilla.mozilla.org/show_bug.cgi?id=1130450So, I need to answer three questions :
1) What is the problem with bad.mp4 ?
2) How can I detect, programmatically (ie at the linux command line) which videos, of a library of videos, are going to have this problem ?
3) How can I fix it, programmatically (eg with FFMPEG).
One thing I noticed was that in the good one, the video is on stream 0 and the audio stream 1, while on the bad one it’s the other way round. I tried swapping the streams but it didn’t seem to help.
EDIT : re the Baseline profile
It was suggested that FF might not like Baseline profile videos. I was able to identify some baseline profile videos that work and some that don’t, so I think that’s not the key problem. Here are a couple more samples :