
Recherche avancée
Médias (1)
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1 000 000 (wav version)
26 septembre 2011, par
Mis à jour : Avril 2013
Langue : English
Type : Audio
Autres articles (99)
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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 -
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" ; -
Les formats acceptés
28 janvier 2010, parLes commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
ffmpeg -codecs ffmpeg -formats
Les format videos acceptés en entrée
Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
Les formats vidéos de sortie possibles
Dans un premier temps on (...)
Sur d’autres sites (5470)
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Real-time seeking and playback ffmpeg use case
6 octobre 2023, par BlackIce2107What is best approach to store the 24x7 RTSP recorded streams and format that can satisfy near real-time seeking and playback preferably without concatenating or trimming them first and then serving the resulting file ?


We have attempted using h264 videos that are segmented into 15 minute chunks with a high key frame interval where the user may request for a start and end time that can span either multiple videos or a single video file.


With FFMPEG this is relatively straightforward but we would need to either concatenate or trim files based on the input which takes a tiny bit of time even with copy codec accurately and even on higher-end EC2s thereby leading to a unsatisfactory user experience.


Additonally attempted to use hevc/h265 to also tackle cost efficiency as this is also a factor in the long run but hevc videos are not widely supported on most browsers.


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avfilter/vf_format : re-use AVFilterFormats for pix_fmt parsing
21 octobre 2023, par Niklas Haasavfilter/vf_format : re-use AVFilterFormats for pix_fmt parsing
Rewrite the format parsing code to make it more easily generalizable. In
particular, `invert_formats` does not depend on the type of format list
passed to it, which allows me to re-use this helper in an upcoming
commit.Slightly shortens the code, at the sole cost of doing several malloc
(ff_add_format) instead of a single malloc. -
Modifying CISCO openh264 to take image frames and out compressed frames
16 mai 2017, par Khurram AminHas anyone tried to modify the CISCO openh264 library to take JPEG images as input and compress them into P and I frames (output as frames, NOT video) and similarly to modify decoder to take compressed P and I frames and generate uncompressed-frames ?
I have a camera looking at a static scene and taking pictures (1280x720p) every 30 second. The scene is almost static. Currenlty I am using JPEG compression to compress each frame individually and it is resulting in an image size of 270KB. This compressed frame is transferred via internet to a storage server. Since there is very little motion in the scene, the ’I’ frame size will be very small (I think it should be 20-50KB). So it will be very cost effective to transmit I frames over internet instead of JPEG images.
Can anyone guide me to some project or about how to proceed with this task ?