
Recherche avancée
Autres articles (54)
-
Websites made with MediaSPIP
2 mai 2011, parThis page lists some websites based on MediaSPIP.
-
Creating farms of unique websites
13 avril 2011, parMediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...) -
(Dés)Activation de fonctionnalités (plugins)
18 février 2011, parPour gérer l’ajout et la suppression de fonctionnalités supplémentaires (ou plugins), MediaSPIP utilise à partir de la version 0.2 SVP.
SVP permet l’activation facile de plugins depuis l’espace de configuration de MediaSPIP.
Pour y accéder, il suffit de se rendre dans l’espace de configuration puis de se rendre sur la page "Gestion des plugins".
MediaSPIP est fourni par défaut avec l’ensemble des plugins dits "compatibles", ils ont été testés et intégrés afin de fonctionner parfaitement avec chaque (...)
Sur d’autres sites (6907)
-
Doc : Tech Resolution Process
10 mars 2021, par Jean-Baptiste Kempf -
Getting video dimension / resolution / width x height from ffmpeg
17 octobre 2023, par David542How would I get the height and width of a video from
ffmpeg
's information output. For example, with the following output :


$ ffmpeg -i video.mp4
...
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
 Metadata:
 major_brand : isom
 minor_version : 1
 compatible_brands: isomavc1
 creation_time : 2010-01-24 00:55:16
 Duration: 00:00:35.08, start: 0.000000, bitrate: 354 kb/s
 Stream #0.0(und): Video: h264 (High), yuv420p, 640x360 [PAR 1:1 DAR 16:9], 597 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc
 Metadata:
 creation_time : 2010-01-24 00:55:16
 Stream #0.1(und): Audio: aac, 44100 Hz, stereo, s16, 109 kb/s
 Metadata:
 creation_time : 2010-01-24 00:55:17
At least one output file must be specified




How would I get
height = 640, width= 360
?

-
Deal with resolution changed while decoding ?
30 juillet 2024, par TTGroupI'm using FFMPEG with C++ to read frames and decode them from RTSP Stream on IP Camera.


Anything is ok, but while decoding, I try to change stream resolution config on IP Camera (ex : change from 1280x720 to 1920x1080).


The result is
av_read_frame()
in while loop still read successful next frames (with new resolution) without error. So I can not detect that change to reinit buffer or reconnect stream to update other stream's information.

av_read_frame()
will read an AVPacket, If I can read resolution info in the AVPacket, then I can detect that change and reinit buffer. But I can't see any resolution info in AVPacket struct.

How do I detect a resolution change while reading and decoding the stream ?



I'm using many codecs as H264 and H265/H265+. This case happened with all 3 codecs above.


In many cases, I also store the AVPacket for later playback, so there's no need for decode. I need to detect the resolution change immediately to be able to properly build header information to store on the HDD.