
Recherche avancée
Autres articles (60)
-
Configurer la prise en compte des langues
15 novembre 2010, parAccéder à la configuration et ajouter des langues prises en compte
Afin de configurer la prise en compte de nouvelles langues, il est nécessaire de se rendre dans la partie "Administrer" du site.
De là, dans le menu de navigation, vous pouvez accéder à une partie "Gestion des langues" permettant d’activer la prise en compte de nouvelles langues.
Chaque nouvelle langue ajoutée reste désactivable tant qu’aucun objet n’est créé dans cette langue. Dans ce cas, elle devient grisée dans la configuration et (...) -
Personnaliser en ajoutant son logo, sa bannière ou son image de fond
5 septembre 2013, parCertains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;
-
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
Sur d’autres sites (8456)
-
How to change resolution without compromising video quality using ffmpeg ?
20 mars 2024, par blake bankerI'm trying to develop a simple video transcoding system.
When you upload a video,
After extracting the video and audio separately,
I want to encode them at 360, 720, and 1080p resolutions respectively and then merge them to create three final mp4 files.
At this time, I have two questions.


- 

-
Is there a big difference between encoding the video and audio separately in the original video file and encoding the original video file as is ? In a related book, it is said that a system is created by separating video and audio, and I am curious as to why.


-
I want to change the resolution without compromising the original image quality. At this time, the resolution of the uploaded file can be known at the time of upload. As a test, I created files according to each resolution, and found that the image quality was damaged. If I want to change only the resolution while keeping the original image quality, I would like to know how to adjust each ffmpeg option. We plan to change it to 360, 720, and 1080p.








-
-
avcodec/av1_vaapi : fixed a decoding corruption issue
2 novembre 2022, par Ruijing Dongavcodec/av1_vaapi : fixed a decoding corruption issue
In av1_spec.pdf page 38/669, there is a sentence below :
if ( frame_type == KEY_FRAME && show_frame )
for ( i = 0 ; i < NUM_REF_FRAMES ; i++)
RefValid[ i ] = 0
......
......
This shows that the condition of invalidating current
DPB frames should be the coming frame_type is KEY_FRAME plus
show_frame is equal to 1. Otherwise, some of the frames
in sequence after KEY_FRAME still refer to the reference frames
before KEY_FRAME, and if these before KEY_FRAME reference
frames were invalidated, these frames could not find their
reference frames, and it could cause image corruption.Mesa fix is in https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19386
Reviewed-by : Fei Wang <fei.w.wang@intel.com>
Signed-off-by : Ruijing Dong <ruijing.dong@amd.com> -
swscale/swscale_unscaled : fixed the issue that when width/height is not 2-multiple...
28 mars 2019, par Dong, Jerryswscale/swscale_unscaled : fixed the issue that when width/height is not 2-multiple, transition of nv12 to u/v planes is not completed.
Signed-off-by : Dong, Jerry <jerry.dong@intel.com>
Signed-off-by : Decai Lin <decai.lin@intel.com>
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>