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Autres articles (61)
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MediaSPIP : Modification des droits de création d’objets et de publication définitive
11 novembre 2010, parPar défaut, MediaSPIP permet de créer 5 types d’objets.
Toujours par défaut les droits de création et de publication définitive de ces objets sont réservés aux administrateurs, mais ils sont bien entendu configurables par les webmestres.
Ces droits sont ainsi bloqués pour plusieurs raisons : parce que le fait d’autoriser à publier doit être la volonté du webmestre pas de l’ensemble de la plateforme et donc ne pas être un choix par défaut ; parce qu’avoir un compte peut servir à autre choses également, (...) -
Emballe médias : à quoi cela sert ?
4 février 2011, parCe plugin vise à gérer des sites de mise en ligne de documents de tous types.
Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ; -
Use, discuss, criticize
13 avril 2011, parTalk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
A discussion list is available for all exchanges between users.
Sur d’autres sites (7100)
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Adjust printf conversion specifiers to match variable signedness
15 décembre 2015, par Diego BiurrunAdjust printf conversion specifiers to match variable signedness
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FPS shown in ffmpeg does not match with total frames/duration
14 juin 2020, par LincolnhujFPS is defined as number of frames per second. But when I try to calculate FPS using total frames / duration, I get slightly different number than the FPS shown in ffmpeg :



For this video http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/ForBiggerFun.mp4
using ffmpeg, we can get its FPS, duration and total frames :





ffprobe -select_streams v -show_streams ForBiggerFun.mp4 | grep nb_frames





nb_frames=1440





ffmpeg -i ForBiggerFun.mp4





23.98 fps
Duration : 00:01:00.07



If we calculate duration per frame using nb_frames, we get
fps = nb_frames/Duration = 1440/60.07 = 23.972032628599965, which is different from 23.98



Which value is more reliable ? Does the difference means duration of a frame might be different from others (frames are not evenly distributed) ?


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How to match ONVIF Camera services with FFMPEG restreaming
2 janvier 2018, par MilenThis is the situation,
I have an IP Camera from which I can view the video associated on an rtsp video streaming.
I also have a software, developed with ffmpeg which takes the camera video, makes some changes to the image and restreams another video, on another rtsp address. The output address rtsp :// :/stream.
Finally, I have an NVR device which is configured to record any camera streaming or substreaming video. To make it work, you have to determine the camera IP and an ONVIF port.
So what I want to do and I dont know how, is to add the camera to the NVR but change the rtsp address. Or maybe, simulate an ONVIF camera service, and associate it with my generated rtsp video. Then, add this ""camera"" to the NVR.
Any answers that consist in recording the video in any other way than using the NVR, will not be useful for me
EDIT :
The first option which consists on adding the camera to the NVR and change the rtsp address didnt work, because the device doesn’t support that. So I want to know how to implement (any language or platform) an ONVIF server which copy the camera service but change the rtsp address.
I downloaded a virtualbox machine which work as ONVIF server, but still didnt know how to change the protocol so It gives my rtsp address to the NVR, because the code was a very close one.