
Recherche avancée
Autres articles (49)
-
La file d’attente de SPIPmotion
28 novembre 2010, parUne file d’attente stockée dans la base de donnée
Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...) -
XMP PHP
13 mai 2011, parDixit Wikipedia, XMP signifie :
Extensible Metadata Platform ou XMP est un format de métadonnées basé sur XML utilisé dans les applications PDF, de photographie et de graphisme. Il a été lancé par Adobe Systems en avril 2001 en étant intégré à la version 5.0 d’Adobe Acrobat.
Étant basé sur XML, il gère un ensemble de tags dynamiques pour l’utilisation dans le cadre du Web sémantique.
XMP permet d’enregistrer sous forme d’un document XML des informations relatives à un fichier : titre, auteur, historique (...) -
Contribute to documentation
13 avril 2011Documentation is vital to the development of improved technical capabilities.
MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
To contribute, register to the project users’ mailing (...)
Sur d’autres sites (5505)
-
Why do file length appears to be longer after using ffmpeg convert HEIC to PNG ?
15 octobre 2024, par BrinyFishI have been moving all my photos from iphone to my windows PC. Because I don't like to keep all the files in HEIC format, so I used ffmpeg to try to batch convert all the photos from HEIC to PNG.


Get-ChildItem *.heic | ForEach-Object {
 ffmpeg -i $_.FullName -map_metadata 0 -q:v 1 "$($_.BaseName).png"
}



File size difference
After testing this chatGPT generated code on a small sample set of photos, I realize that the length of the PNG photos are smaller than the length of the HEIC photos. I have always believed that HEIC is the compressed format, which should be smaller. However, this size difference really makes me wonder if I am losing resultion or meta data. Do anyone know why would this be the case ?


I have googled and most articles are saying that HEIC should be smaller than PNG, which don't help me in this case.


-
lavc/vvc : Don't check motion estimation region for IBC
28 novembre 2024, par Frank Plowmanlavc/vvc : Don't check motion estimation region for IBC
The final parameter of check_available determines whether the motion
estimation region constraints imposed in section 8.5.2.3 of H.266 (V3)
on MVP candidates apply to the current candidate or not. In the case of
IBC spatial merge candidates they do not, as their availability is
dependent only on the criteria described in sections 8.6.2.3 and 6.4.4,
which do not include this constraint on the motion estimation region.Signed-off-by : Frank Plowman <post@frankplowman.com>
-
h265 and CRF in a specific region
11 juin 2021, par D.GiunchiI need to create an h265 with a region that is compressed with a different CRF.


I was thinking of generating 2 compressed videos from the original using h265 with different CRFs and then blending each frame. The final step is to create an h265 video from the blended frames using the min CRF between the two. Does it make sense or there is a simpler and better way ?